0001193125-25-258663 | 10-Q | XBRL Viewer

Long-Term Debt - Long-Term Debt (Parenthetical) (Detail) - 2.500% Senior Unsecured Notes Due 2031 [Member]	3 Months Ended
	Sep. 30, 2025	Jul. 01, 2021
Debt Instrument [Line Items]
Debt instrument, interest rate	2.50%	2.50%
Debt instrument, maturity year	2031

- Definition

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

+ References

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+ Details

Segment Information - Financial Information Related to Operations by Segment (Parenthetical) (Detail) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Sep. 30, 2025	Sep. 30, 2024	Sep. 30, 2025	Sep. 30, 2024
Segment Reporting Information [Line Items]
Depreciation, Depletion, and Amortization			$ 82,633	$ 77,427
Corporate Assets [Member]
Segment Reporting Information [Line Items]
Depreciation, Depletion, and Amortization	$ 1,228	$ 767	$ 2,052	$ 1,507

- Definition

The aggregate expense recognized in the current period that allocates the cost of tangible assets, intangible assets, or depleting assets to periods that benefit from use of the assets.

+ References + Details

REVENUE	6 Months Ended
Sep. 30, 2025
Revenue from Contract with Customer [Abstract]
REVENUE	(D) REVENUE We earn Revenue primarily from the sale of products, which include cement, concrete, aggregates, gypsum wallboard, and recycled paperboard. The vast majority of Revenue from the sale of concrete, aggregates, and gypsum wallboard is originated by purchase orders from our customers, who are mostly third-party contractors and suppliers. Revenue from the sale of cement is recognized at the point-of-sale to customers under sales orders. Revenue from our Recycled Paperboard segment is generated mainly through long-term supply agreements. These agreements do not have a stated maturity date, but may be terminated by either party with a two to three-year notice period. We invoice customers upon shipment, and our collection terms range from 30 to 75 days. Revenue from the sale of cement, concrete, aggregates, and gypsum wallboard not related to long-term supply agreements is recognized upon shipment of the related products to customers, which is when title and ownership are transferred, and the customer is obligated to pay. Revenue from sales under our long-term supply agreements is also recognized upon transfer of control to the customer, which generally occurs at the time the product is shipped from the production facility or terminal location. Our long-term supply agreements with customers define, among other commitments, the volume of product we must provide and the volume that the customer must purchase by the end of the defined periods. Pricing structures under our agreements are generally market-based, but are subject to certain contractual adjustments. Shortfall amounts, if applicable under these arrangements, are constrained and not recognized as Revenue until an agreement is reached with the customer and, therefore, are not subject to the risk of reversal. The Company offers certain of its customers, including those with long-term supply agreements, rebates and incentives, which we treat as variable consideration. We adjust the amount of Revenue recognized for the variable consideration using the most likely amount method based on past history and projected volumes in the rebate and incentive period. Any amounts billed to customers for taxes are excluded from Revenue. The Company has elected to treat freight and delivery charges we pay for the delivery of goods to our customers as a fulfillment activity rather than a separate performance obligation. When we arrange for a third party to deliver products to customers, fees for shipping and handling billed to the customer are recorded as Revenue, while costs we incur for shipping and handling are recorded as expenses and included in Cost of Goods Sold. Other Non-Operating Income includes lease and rental income, asset sale income, non-inventoried aggregates sales income, distribution center income, and trucking income, as well as other miscellaneous revenue items and costs that have not been allocated to a business segment. See Note (N) to the Unaudited Consolidated Financial Statements for disaggregation of revenue by segment.

REVENUE

6 Months Ended

Sep. 30, 2025

Revenue from Contract with Customer [Abstract]

REVENUE

(D) REVENUE

We earn Revenue primarily from the sale of products, which include cement, concrete, aggregates, gypsum wallboard, and recycled paperboard. The vast majority of Revenue from the sale of concrete, aggregates, and gypsum wallboard is originated by purchase orders from our customers, who are mostly third-party contractors and suppliers. Revenue from the sale of cement is recognized at the point-of-sale to customers under sales orders. Revenue from our Recycled Paperboard segment is generated mainly through long-term supply agreements. These agreements do not have a stated maturity date, but may be terminated by either party with a two to three-year notice period. We invoice customers upon shipment, and our collection terms range from 30 to 75 days. Revenue from the sale of cement, concrete, aggregates, and gypsum wallboard not related to long-term supply agreements is recognized upon shipment of the related products to customers, which is when title and ownership are transferred, and the customer is obligated to pay.

Revenue from sales under our long-term supply agreements is also recognized upon transfer of control to the customer, which generally occurs at the time the product is shipped from the production facility or terminal location. Our long-term supply agreements with customers define, among other commitments, the volume of product we must provide and the volume that the customer must purchase by the end of the defined periods. Pricing structures under our agreements are generally market-based, but are subject to certain contractual adjustments. Shortfall amounts, if applicable under these arrangements, are constrained and not recognized as Revenue until an agreement is reached with the customer and, therefore, are not subject to the risk of reversal.

The Company offers certain of its customers, including those with long-term supply agreements, rebates and incentives, which we treat as variable consideration. We adjust the amount of Revenue recognized for the variable consideration using the most likely amount method based on past history and projected volumes in the rebate and incentive period. Any amounts billed to customers for taxes are excluded from Revenue.

The Company has elected to treat freight and delivery charges we pay for the delivery of goods to our customers as a fulfillment activity rather than a separate performance obligation. When we arrange for a third party to deliver products to customers, fees for shipping and handling billed to the customer are recorded as Revenue, while costs we incur for shipping and handling are recorded as expenses and included in Cost of Goods Sold.

Other Non-Operating Income includes lease and rental income, asset sale income, non-inventoried aggregates sales income, distribution center income, and trucking income, as well as other miscellaneous revenue items and costs that have not been allocated to a business segment.

See Note (N) to the Unaudited Consolidated Financial Statements for disaggregation of revenue by segment.

- Definition

The entire disclosure of revenue from contract with customer to transfer good or service and to transfer nonfinancial asset. Includes, but is not limited to, disaggregation of revenue, credit loss recognized from contract with customer, judgment and change in judgment related to contract with customer, and asset recognized from cost incurred to obtain or fulfill contract with customer. Excludes insurance and lease contracts.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 606
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+ Details

Income Taxes - Additional Information (Detail)	6 Months Ended
Income Taxes - Additional Information (Detail)	Sep. 30, 2025	Sep. 30, 2024
Income Tax Disclosure [Abstract]
Effective tax rate	22.00%	22.00%
Statutory tax rate	21.00%

Consolidated Statements of Earnings (unaudited) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Sep. 30, 2025	Sep. 30, 2024	Sep. 30, 2025	Sep. 30, 2024
Income Statement [Abstract]
Revenue	$ 638,906	$ 623,619	$ 1,273,596	$ 1,232,308
Cost of Goods Sold	439,194	419,775	888,285	841,596
Gross Profit	199,712	203,844	385,311	390,712
Equity in Earnings of Unconsolidated Joint Venture	6,309	9,276	10,113	16,992
Corporate General and Administrative Expense	(21,316)	(17,879)	(42,099)	(33,528)
Other Non-Operating Income	1,131	724	2,085	3,407
Interest Expense, net	(9,362)	(10,714)	(21,078)	(21,398)
Earnings before Income Taxes	176,474	185,251	334,332	356,185
Income Taxes	(39,091)	(41,731)	(73,587)	(78,823)
Net Earnings	$ 137,383	$ 143,520	$ 260,745	$ 277,362
EARNINGS PER SHARE
Basic	$ 4.25	$ 4.29	$ 8.03	$ 8.26
Diluted	$ 4.23	$ 4.26	$ 7.99	$ 8.19
WEIGHTED AVERAGE SHARES OUTSTANDING
Basic	32,297,313	33,431,315	32,459,801	33,581,970
Diluted	32,469,833	33,716,036	32,638,307	33,853,703
CASH DIVIDENDS PER SHARE	$ 0.25	$ 0.25	$ 0.5	$ 0.5

Fair Value of Financial Instruments (Parenthetical) (Detail) - 2.500% Senior Unsecured Notes Due 2031 [Member]	3 Months Ended
	Sep. 30, 2025	Jul. 01, 2021
Fair Value Of Financial Instruments [Line Items]
Debt instrument, interest rate	2.50%	2.50%
Debt instrument, maturity year	2031

Equity Awards - Summary of Activity for Restricted Stock Units and Nonvested Restricted Stock (Detail) - Restricted Stock Units and Restricted Stock [Member]	6 Months Ended
	Sep. 30, 2025 $ / shares shares
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Number of Shares, Restricted Stock Units and Nonvested Restricted Stock at March 31, 2025 \| shares	194,099
Number of Shares, Granted \| shares	70,167
Number of Shares, Vested \| shares	(73,347)
Number of Shares, Cancelled \| shares	0
Number of Shares, Restricted Stock Units and Nonvested Restricted Stock at September 30, 2025 \| shares	190,919
Weighted Average Grant Date Fair Value, Restricted Stock at March 31, 2025 \| $ / shares	$ 150.56
Weighted Average Grant Date Fair Value, Granted \| $ / shares	215.28
Weighted Average Grant Date Fair Value, Vested \| $ / shares	107.09
Weighted Average Grant Date Fair Value, Cancelled \| $ / shares	0
Weighted Average Grant Date Fair Value, Restricted Stock at September 30, 2025 \| $ / shares	$ 123.94

ACCOUNTS RECEIVABLE

6 Months Ended

Sep. 30, 2025

Receivables [Abstract]

ACCOUNTS RECEIVABLE

(E) ACCOUNTS RECEIVABLE

Accounts Receivable are shown net of the allowance for credit losses totaling $6.7 million at both September 30, 2025, and March 31, 2025. We perform ongoing credit evaluations of our customers’ financial condition and generally require no collateral from our customers. The allowance for non-collection of receivables is based on analysis of economic trends in the construction industry, detailed analysis of the expected collectability of past due accounts receivable, and the expected collectability of overall receivables. We have no significant credit risk concentration among our diversified customer base.

Accounts Receivable - Additional Information (Detail) - USD ($) $ in Millions	Sep. 30, 2025	Mar. 31, 2025
Receivables [Abstract]
Allowance for doubtful accounts	$ 6.7	$ 6.7

INTEREST EXPENSE (Tables)

6 Months Ended

Sep. 30, 2025

Banking and Thrift, Interest [Abstract]

Interest Expense, Net

The following components are included in Interest Expense, net:



	For the Three Months Ended September 30,								For the Six Months Ended September 30,


		2025				2024				2025				2024


	(dollars in thousands)								(dollars in thousands)


Interest Income	$		(363	)	$		(558	)	$		(514	)	$		(740	)


Interest Expense			11,203				11,420				23,942				22,103


Other Expenses			474				474				948				949


Interest Capitalized			(1,952	)			(622	)			(3,298	)			(914	)


Interest Expense, net	$		9,362		$		10,714		$		21,078		$		21,398

Consolidated Statements of Comprehensive Earnings (unaudited) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Sep. 30, 2025	Sep. 30, 2024	Sep. 30, 2025	Sep. 30, 2024
Statement of Comprehensive Income [Abstract]
Net Income (Loss)	$ 137,383	$ 143,520	$ 260,745	$ 277,362
Net Actuarial Change in Defined Benefit Plans:
Amortization of Net Actuarial Loss	53	60	106	120
Tax Expense	(12)	(15)	(24)	(30)
Comprehensive Earnings	$ 137,424	$ 143,565	$ 260,827	$ 277,452

- Definition

Amount after tax of increase (decrease) in equity from transactions and other events and circumstances from net income and other comprehensive income, attributable to parent entity. Excludes changes in equity resulting from investments by owners and distributions to owners.

+ References + Details

- Definition

The portion of profit or loss for the period, net of income taxes, which is attributable to the parent.

+ References

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Reference 48: http://www.xbrl.org/2003/role/disclosureRef
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+ Details

Equity Awards - Additional Information (Detail) - USD ($) $ in Millions	1 Months Ended	3 Months Ended		6 Months Ended
	May 31, 2025	Sep. 30, 2025	Sep. 30, 2024	Sep. 30, 2025	Sep. 30, 2024	Aug. 03, 2023
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Common Stock, Capital Shares Reserved for Future Issuance						1,425,000
Number of shares available for future grant		1,244,080		1,244,080
Stock option expense		$ 0.5	$ 0.3	$ 0.9	$ 0.6
Aggregate intrinsic value for outstanding options		25.0		25.0
Aggregate intrinsic value for exercisable options		22.9		22.9
Total intrinsic value of options exercised				$ 0.8
Number of Shares, Exercised				(6,003)
Restricted stock or unit expense		$ 5.0	$ 4.6	$ 9.4	$ 8.8
Maximum Performance Level [Member]
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Vesting Percentage of Target PSA's				200.00%
Threshold Performance Level [Member]
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Vesting Percentage of Target PSA's				50.00%
Performance share units [Member]
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Allocated share based compensation expense				$ 17.4
Performance share units [Member] \| Fiscal 2026 Stock Awards [Member]
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Number of shares available for future grant	29,273
Performance stock options [Member] \| Fiscal 2026 Stock Awards [Member]
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Number of shares available for future grant	14,712
Performance Vesting Stock Options [Member] \| Long Term Compensation Plan [Member]
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Stock based compensation plan, description				The performance vesting criteria are based upon certain levels of average annual return on equity (as defined in the Performance Stock Award Agreements) ranging from 10.0% to 20.0% measured at the end of fiscal 2028 (three-year performance period) as modified by total stockholder return. Performance outcomes (taking into account both criteria) will result in a threshold vesting percentage of 50% of target and maximum performance will result in a vesting percentage of 200% of target. If the threshold vesting percentage is not achieved none of the Performance Stock Awards will be earned.
Performance Vesting Stock Options [Member] \| Long Term Compensation Plan [Member] \| Maximum [Member]
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Percentage of average return on invested capital	20.00%
Performance Vesting Stock Options [Member] \| Long Term Compensation Plan [Member] \| Minimum [Member]
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Percentage of average return on invested capital	10.00%
Fiscal 2026 Time Vesting Stock Options [Member] \| Long Term Compensation Plan [Member]
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Number of shares available for future grant		14,712		14,712
Share-based compensation vesting period				3 years
Employee Stock Option
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Weighted-average period of recognition of unrecognized compensation cost				2 years 2 months 12 days
Unrecognized compensation expense		$ 3.2		$ 3.2
Time Vesting Restricted Stock [Member]
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Number of shares available for future grant		29,273		29,273
Fiscal 2026 Employee Restricted Stock Unit Time-Vesting Award [Member] \| Long Term Compensation Plan [Member]
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Share-based compensation vesting period				3 years
Restricted Stock [Member]
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Weighted-average period of recognition of unrecognized compensation cost				1 year 7 months 6 days
Unrecognized compensation expense		$ 27.8		$ 27.8

LEASES

6 Months Ended

Sep. 30, 2025

Leases [Abstract]

LEASES

(H) LEASES

We lease certain real estate, buildings, and equipment, including railcars and barges. Certain of these leases contain escalations of rent over the term of the lease, as well as options for us to extend the term of the lease at the end of the original term. These extensions range from periods of one year to 20 years. Our lease agreements do not contain material residual value guarantees or material restrictive covenants. In calculating the present value of future minimum lease payments, we use the rate implicit in the lease if it can be determined. Otherwise, we use our incremental borrowing rate in effect at the commencement of the lease to determine the present value of the future minimum lease payments. Additionally, we lease certain equipment under short-term leases with initial terms of less than 12 months, which are not recorded on the balance sheet.

Lease expense for our operating and short-term leases is as follows:



	For the Three Months Ended September 30,				For the Six Months Ended September 30,


	2025		2024		2025		2024


	(dollars in thousands)				(dollars in thousands)


Operating Lease Cost	$	2,260	$	1,904	$	4,459	$	3,951


Short-Term Lease Cost		518		304		1,141		645


Total Lease Cost	$	2,778	$	2,208	$	5,600	$	4,596

The Right-of-Use Assets and Lease Liabilities are reflected on our Balance Sheet as follows:



	September 30,		March 31,


	2025		2025


	(dollars in thousands)


Operating Leases:


Operating Lease Right-of-Use Assets	$	30,991	$	29,313





Current Operating Lease Liabilities	$	4,522	$	4,032


Noncurrent Operating Lease Liabilities		34,248		33,597


Total Operating Lease Liabilities	$	38,770	$	37,629

Future payments for operating leases are as follows:



	Amount
Fiscal Year	(dollars in thousands)


2026 (remaining six months)	$	2,890


2027		5,227


2028		4,467


2029		4,044


2030		4,130


Thereafter		30,037


Total Lease Payments	$	50,795


Less: Imputed Interest		(12,025	)


Present Value of Lease Liabilities	$	38,770





Weighted-Average Remaining Lease Term (in years)		11.8


Weighted-Average Discount Rate		4.43	%

Equity Awards - Stock Option Activity (Detail)	6 Months Ended
Equity Awards - Stock Option Activity (Detail)	Sep. 30, 2025 $ / shares shares
Share-Based Payment Arrangement [Abstract]
Number of Shares, Outstanding Options at March 31, 2025 \| shares	184,233
Number of Shares, Granted \| shares	29,424
Number of Shares, Exercised \| shares	(6,003)
Number of Shares, Cancelled \| shares	0
Number of Shares, Outstanding Options at September 30, 2025 \| shares	207,654
Number of Shares, Options Exercisable at September 30, 2025 \| shares	160,325
Weighted Average Fair Value of Options Granted During the Year \| $ / shares	$ 90.94
Weighted-Average Exercise Price, Outstanding Options at March 31, 2025 \| $ / shares	95.75
Weighted-Average Exercise Price, Granted \| $ / shares	213.66
Weighted-Average Exercise Price, Exercised \| $ / shares	79.73
Weighted-Average Exercise Price, Cancelled \| $ / shares	0
Weighted-Average Exercise Price, Outstanding Options at September 30, 2025 \| $ / shares	$ 112.92

COMPUTATION OF EARNINGS PER SHARE

6 Months Ended

Sep. 30, 2025

Earnings Per Share [Abstract]

COMPUTATION OF EARNINGS PER SHARE

(J) COMPUTATION OF EARNINGS PER SHARE

The calculation of basic and diluted common shares outstanding is as follows:



	For the Three Months Ended September 30,						For the Six Months Ended September 30,


	2025			2024			2025			2024


Weighted-Average Shares of Common Stock Outstanding		32,297,313			33,431,315			32,459,801			33,581,970


Effect of Dilutive Shares:


Assumed Exercise of Outstanding Dilutive Options		175,755			239,969			177,256			245,200


Less Shares Repurchased from Proceeds of Assumed Exercised Options		(72,822	)		(92,198	)		(75,674	)		(95,378	)


Restricted Stock and Restricted Stock Units		69,587			136,950			76,924			121,911


Weighted-Average Common Stock and Dilutive Securities Outstanding		32,469,833			33,716,036			32,638,307			33,853,703


Shares Excluded Due to Anti-Dilution Effects, Including Contingent Awards		41,982			4,701			34,392			3,332

FAIR VALUE OF FINANCIAL INSTRUMENTS (Tables)

6 Months Ended

Sep. 30, 2025

Fair Value Disclosures [Abstract]

Fair Value of Senior Notes

The fair value of our long-term debt has been estimated based on our current incremental borrowing rates for similar types of borrowing arrangements. The fair value of our 2.500% Senior Unsecured Notes at September 30, 2025, is as follows:



	Fair Value
	(dollars in thousands)


2.500% Senior Unsecured Notes Due 2031	$	679,000

PENSION AND EMPLOYEE BENEFIT PLANS

6 Months Ended

Sep. 30, 2025

Retirement Benefits [Abstract]

PENSION AND EMPLOYEE BENEFIT PLANS

(K) PENSION AND EMPLOYEE BENEFIT PLANS

We sponsor several single-employer defined benefit plans and defined contribution plans, which together cover substantially all our employees. Benefits paid under the single-employer defined benefit plans covering certain hourly employees were historically based on years of service and the employee’s qualifying compensation over the last few years of employment. These plans have been frozen to new participants and new benefits over the last several years, with the last plan frozen during fiscal 2020. Our defined benefit plans are all fully funded, with plan assets exceeding the benefit obligation at March 31, 2025. Due to the frozen status and current funding of the single-employer pension plans, our expected pension expense for fiscal 2026 is less than $0.1 million.

- Definition

The entire disclosure for retirement benefits.

+ References

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+ Details

Acquisition - Additional Information (Details) - USD ($) $ in Thousands		3 Months Ended	6 Months Ended
	Jan. 07, 2025	Sep. 30, 2025	Sep. 30, 2025	Sep. 30, 2024
Business Combination [Line Items]
Purchase price of separate operating segment			$ 0	$ 24,881
Western Pennsylvania Acquisition [Member]
Business Combination [Line Items]
Purchase price of separate operating segment	$ 149,900
Depreciation		$ 1,700	3,400
Amortization		$ 1,700	$ 3,400
Western Pennsylvania Acquisition [Member] \| Minimum [Member]
Business Combination [Line Items]
Property, plant and equipment, estimated useful life		5 years	5 years
Western Pennsylvania Acquisition [Member] \| Maximum [Member]
Business Combination [Line Items]
Property, plant and equipment, estimated useful life		30 years	30 years

- Definition

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

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+ Details

Pay vs Performance Disclosure - USD ($) $ in Thousands	3 Months Ended				6 Months Ended
Pay vs Performance Disclosure - USD ($) $ in Thousands	Sep. 30, 2025	Jun. 30, 2025	Sep. 30, 2024	Jun. 30, 2024	Sep. 30, 2025	Sep. 30, 2024
Pay vs Performance Disclosure
Net Income (Loss)	$ 137,383	$ 123,362	$ 143,520	$ 133,842	$ 260,745	$ 277,362

- Definition

The portion of profit or loss for the period, net of income taxes, which is attributable to the parent.

+ References

+ Details

Inventories - Schedule of Inventories (Detail) - USD ($) $ in Thousands	Sep. 30, 2025	Mar. 31, 2025
Inventory [Line Items]
Inventories	$ 370,207	$ 415,175
Raw Materials and Material-in-Progress [Member]
Inventory [Line Items]
Inventories	141,042	164,683
Finished Cement [Member]
Inventory [Line Items]
Inventories	48,292	67,711
Aggregates [Member]
Inventory [Line Items]
Inventories	15,157	17,681
Gypsum Wallboard [Member]
Inventory [Line Items]
Inventories	5,543	5,708
Recycled Paperboard [Member]
Inventory [Line Items]
Inventories	10,024	7,814
Repair Parts and Supplies [Member]
Inventory [Line Items]
Inventories	128,706	126,983
Fuel and Coal [Member]
Inventory [Line Items]
Inventories	$ 21,443	$ 24,595

Fair Value of Financial Instruments (Detail) $ in Thousands	Sep. 30, 2025 USD ($)
2.500% Senior Unsecured Notes Due 2031 [Member]
Fair Value Of Financial Instruments [Line Items]
Fair Value of long term debt	$ 679,000

- Definition

The fair value amount of long-term debt whether such amount is presented as a separate caption or as a parenthetical disclosure. Additionally, this element may be used in connection with the fair value disclosures required in the footnote disclosures to the financial statements. The element may be used in both the balance sheet and disclosure in the same submission.

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+ Details

Equity Awards - Stock Options Outstanding (Detail)	6 Months Ended
Equity Awards - Stock Options Outstanding (Detail)	Sep. 30, 2025 $ / shares shares
Share Based Compensation Shares Authorized Under Stock Option Plans Exercise Price Range [Line Items]
Options Outstanding, Number of Shares Outstanding \| shares	207,654
Options Outstanding, Weighted-Average Remaining Contractual Life (in years)	4 years 2 months 26 days
Options Outstanding, Weighted-Average Exercise Price	$ 112.92
Options Exercisable , Number of Shares Outstanding \| shares	160,325
Options Exercisable, Weighted-Average Exercise Price	$ 90.26
$59.32 - $81.28 [Member]
Share Based Compensation Shares Authorized Under Stock Option Plans Exercise Price Range [Line Items]
Range of Exercise Prices, Lower Range	59.32
Range of Exercise Prices, Upper Range	$ 81.28
Options Outstanding, Number of Shares Outstanding \| shares	82,057
Options Outstanding, Weighted-Average Remaining Contractual Life (in years)	4 years 4 months 2 days
Options Outstanding, Weighted-Average Exercise Price	$ 61.78
Options Exercisable , Number of Shares Outstanding \| shares	82,057
Options Exercisable, Weighted-Average Exercise Price	$ 61.78
$91.21 - $100.88 [Member]
Share Based Compensation Shares Authorized Under Stock Option Plans Exercise Price Range [Line Items]
Range of Exercise Prices, Lower Range	91.21
Range of Exercise Prices, Upper Range	$ 100.88
Options Outstanding, Number of Shares Outstanding \| shares	32,852
Options Outstanding, Weighted-Average Remaining Contractual Life (in years)	2 years 9 months 3 days
Options Outstanding, Weighted-Average Exercise Price	$ 94.95
Options Exercisable , Number of Shares Outstanding \| shares	32,852
Options Exercisable, Weighted-Average Exercise Price	$ 94.95
$118.27 - $139.25 [Member]
Share Based Compensation Shares Authorized Under Stock Option Plans Exercise Price Range [Line Items]
Range of Exercise Prices, Lower Range	118.27
Range of Exercise Prices, Upper Range	$ 139.25
Options Outstanding, Number of Shares Outstanding \| shares	48,931
Options Outstanding, Weighted-Average Remaining Contractual Life (in years)	6 years 7 months 9 days
Options Outstanding, Weighted-Average Exercise Price	$ 126.59
Options Exercisable , Number of Shares Outstanding \| shares	36,079
Options Exercisable, Weighted-Average Exercise Price	$ 126.93
$143.09 - $261.76 [Member]
Share Based Compensation Shares Authorized Under Stock Option Plans Exercise Price Range [Line Items]
Range of Exercise Prices, Lower Range	143.09
Range of Exercise Prices, Upper Range	$ 261.76
Options Outstanding, Number of Shares Outstanding \| shares	43,814
Options Outstanding, Weighted-Average Remaining Contractual Life (in years)	2 years 6 months 3 days
Options Outstanding, Weighted-Average Exercise Price	$ 206.91
Options Exercisable , Number of Shares Outstanding \| shares	9,337
Options Exercisable, Weighted-Average Exercise Price	$ 182.32

Pension and Employee Benefit Plans - Additional information (Detail) $ in Millions	6 Months Ended
	Sep. 30, 2025 USD ($)
Maximum [Member]
Defined Benefit Plan Disclosure [Line Items]
Expected pension expense for fiscal 2025	$ 0.1

- Definition

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

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+ Details

Consolidated Balance Sheets (unaudited) (Parenthetical) - $ / shares	Sep. 30, 2025	Mar. 31, 2025
Statement of Financial Position [Abstract]
Preferred Stock, Par Value	$ 0.01	$ 0.01
Preferred Stock, Authorized	5,000,000	5,000,000
Preferred Stock, Issued	0	0
Common Stock, Par Value	$ 0.01	$ 0.01
Common Stock, Authorized	100,000,000	100,000,000
Common Stock, Issued	32,202,392	32,973,121
Common Stock, Outstanding	32,202,392	32,973,121

Revenue - Additional Information (Detail)	6 Months Ended
Revenue - Additional Information (Detail)	Sep. 30, 2025
Minimum [Member]
Supply Commitment [Line Items]
Revenue from contract with customer collection terms	30 days
Long term supply agreements term of termination notice period	2 years
Maximum [Member]
Supply Commitment [Line Items]
Revenue from contract with customer collection terms	75 days
Long term supply agreements term of termination notice period	3 years

Consolidated Statements of Cash Flows (unaudited) - USD ($) $ in Thousands	6 Months Ended
	Sep. 30, 2025	Sep. 30, 2024
CASH FLOWS FROM OPERATING ACTIVITIES
Net Income (Loss)	$ 260,745	$ 277,362
Adjustments to Reconcile Net Earnings to Net Cash Provided by Operating Activities, Net of Effect of Non-Cash Activity:
Depreciation, Depletion, and Amortization	82,633	77,427
Deferred Income Tax Provision	13,129	936
Stock Compensation Expense	10,290	9,403
Equity in Earnings of Unconsolidated Joint Venture	(10,113)	(16,992)
Changes in Operating Assets and Liabilities
Accounts Receivable	(38,440)	(43,364)
Inventories	44,967	(358)
Accounts Payable and Accrued Liabilities	(4,347)	3,763
Other Assets	(25,534)	(16,279)
Income Taxes Payable (Receivable)	7,901	74,000
Net Cash Provided by Operating Activities	341,231	365,898
CASH FLOWS FROM INVESTING ACTIVITIES
Additions to Property, Plant, and Equipment	(184,635)	(99,605)
Acquisition Spending	0	(24,881)
Net Cash Used in Investing Activities	(184,635)	(124,486)
CASH FLOWS FROM FINANCING ACTIVITIES
Borrowings Under Revolving Credit Facility	130,000	80,000
Repayment of Borrowings Under Revolving Credit Facility	(75,000)	(95,000)
Repayment of Term Loan	(7,500)	(5,000)
Dividends Paid to Stockholders	(16,631)	(17,001)
Purchase and Retirement of Common Stock	(167,700)	(146,176)
Proceeds from Stock Option Exercises	479	2,205
Shares Redeemed to Settle Employee Taxes on Stock Compensation	(5,612)	(1,456)
Net Cash Used in Financing Activities	(141,964)	(182,428)
NET INCREASE IN CASH AND CASH EQUIVALENTS	14,632	58,984
CASH AND CASH EQUIVALENTS AT BEGINNING OF PERIOD	20,401	34,925
CASH AND CASH EQUIVALENTS AT END OF PERIOD	$ 35,033	$ 93,909

BASIS OF PRESENTATION (Policies)

6 Months Ended

Sep. 30, 2025

Accounting Policies [Abstract]

Recent Accounting Pronouncements

PENDING ADOPTION

In December 2023, the Financial Accounting Standards Board (FASB) issued Accounting Standards Update No. 2023-09, Income Taxes (Topic 740): Improvements to Income Tax Disclosures (ASU 2023-09), which focuses on the rate reconciliation and income taxes paid. ASU 2023-09 requires public entities to disclose, on an annual basis, a tabular rate reconciliation using both percentages and currency amounts organized by specified categories with certain reconciling items broken out by nature and jurisdiction to the extent those items exceed a specified threshold. Additionally, all entities are required to disclose income taxes paid, net of refunds received, disaggregated by federal, state, local, and individual jurisdiction if the amount is at least 5% of the total income tax payments, net of refunds received. ASU 2023-09 is effective prospectively for annual periods beginning after December 15, 2024. Early adoption and retrospective application are permitted. ASU 2023-09 will not have any impact on the Company's results of operations, cash flows, and financial condition.

In November 2024, the FASB issued Accounting Standards Update No. 2024-03, Income Statement-Reporting Comprehensive Income-Expense Disaggregation Disclosures (Subtopic 220-40): Disaggregation of Income and Expenses (ASU 2024-03). ASU 2024-03 requires public business entities to disclose additional information about certain key expense categories within major income statement captions in the Notes to the Consolidated Financial Statements. The new standard is effective for fiscal years beginning after December 15, 2026, and is to be applied prospectively. Early adoption is permitted. The Company is currently evaluating the impact of adopting this guidance on its Consolidated Financial Statements.

Leases - Schedule of Future Payments for Operating Leases (Detail) - USD ($) $ in Thousands	Jun. 30, 2025	Mar. 31, 2025
Leases [Abstract]
2026 (remaining six months)	$ 2,890
2027	5,227
2028	4,467
2029	4,044
2030	4,130
Thereafter	30,037
Total Lease Payments	50,795
Less: Imputed Interest	(12,025)
Present Value of Lease Liabilities	$ 38,770	$ 37,629
Weighted-Average Remaining Lease Term (in years)	11 years 9 months 18 days
Weighted-Average Discount Rate	4.43%

BASIS OF PRESENTATION

6 Months Ended

Sep. 30, 2025

Accounting Policies [Abstract]

BASIS OF PRESENTATION

(A) BASIS OF PRESENTATION

The accompanying Unaudited Consolidated Financial Statements as of and for the three and six months ended September 30, 2025, include the accounts of Eagle Materials Inc. and its majority-owned subsidiaries (collectively, the Company, us, or we) and have been prepared by the Company, without audit, pursuant to the rules and regulations of the Securities and Exchange Commission. These Unaudited Consolidated Financial Statements should be read in conjunction with the Audited Consolidated Financial Statements and the notes thereto included in our Annual Report on Form 10-K for the fiscal year ended March 31, 2025, filed with the Securities and Exchange Commission on May 20, 2025.

Certain information and footnote disclosures normally included in financial statements prepared in accordance with generally accepted accounting principles have been condensed or omitted pursuant to such rules and regulations, although we believe that the disclosures are adequate to make the information presented not misleading. In our opinion, all adjustments (consisting solely of normal recurring adjustments) necessary to present fairly the information in the following Unaudited Consolidated Financial Statements of the Company have been included. The results of operations for interim periods are not necessarily indicative of the results for the full year.

The preparation of financial statements in conformity with accounting principles generally accepted in the United States requires management to make estimates and assumptions that affect the reported amounts of assets and liabilities, disclosures of contingent assets and liabilities at the date of the financial statements, and the reported amounts of revenue and expenses during the reporting period. Actual results could differ from those estimates.

Recent Accounting Pronouncements

PENDING ADOPTION

FAIR VALUE OF FINANCIAL INSTRUMENTS

6 Months Ended

Sep. 30, 2025

Fair Value Disclosures [Abstract]

FAIR VALUE OF FINANCIAL INSTRUMENTS

(Q) FAIR VALUE OF FINANCIAL INSTRUMENTS



	Fair Value
	(dollars in thousands)


2.500% Senior Unsecured Notes Due 2031	$	679,000

The estimated fair value of our long-term debt was based on quoted prices of similar debt instruments with similar terms that are publicly traded (estimated based on Level 1 input of the fair value hierarchy). The carrying values of Cash and Cash Equivalents, Accounts Receivable, Accounts Payable, and Accrued Liabilities approximate their fair values at September 30, 2025, because these assets and liabilities have short-term maturities. The fair value of our Revolving Credit Facility and Term Loan also approximates the carrying value at September 30, 2025.

- Definition

The entire disclosure for the fair value of financial instruments (as defined), including financial assets and financial liabilities (collectively, as defined), and the measurements of those instruments as well as disclosures related to the fair value of non-financial assets and liabilities. Such disclosures about the financial instruments, assets, and liabilities would include: (1) the fair value of the required items together with their carrying amounts (as appropriate); (2) for items for which it is not practicable to estimate fair value, disclosure would include: (a) information pertinent to estimating fair value (including, carrying amount, effective interest rate, and maturity, and (b) the reasons why it is not practicable to estimate fair value; (3) significant concentrations of credit risk including: (a) information about the activity, region, or economic characteristics identifying a concentration, (b) the maximum amount of loss the entity is exposed to based on the gross fair value of the related item, (c) policy for requiring collateral or other security and information as to accessing such collateral or security, and (d) the nature and brief description of such collateral or security; (4) quantitative information about market risks and how such risks are managed; (5) for items measured on both a recurring and nonrecurring basis information regarding the inputs used to develop the fair value measurement; and (6) for items presented in the financial statement for which fair value measurement is elected: (a) information necessary to understand the reasons for the election, (b) discussion of the effect of fair value changes on earnings, (c) a description of [similar groups] items for which the election is made and the relation thereof to the balance sheet, the aggregate carrying value of items included in the balance sheet that are not eligible for the election; (7) all other required (as defined) and desired information.

+ References

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+ Details

Consolidated Statements of Stockholders' Equity (unaudited) - USD ($) $ in Thousands	Total	Common Stock [Member]	Capital in Excess of Par Value [Member]	Retained Earnings [Member]	Accumulated Other Comprehensive Losses [Member]
Beginning balance at Mar. 31, 2024	$ 1,308,535	$ 341		$ 1,311,567	$ (3,373)
Net Earnings	133,842			133,842
Stock Option Exercises and Restricted Share Vesting	56		$ 56
Stock Compensation Expense	4,539		4,539
Shares Redeemed to Settle Employee Taxes	(1,421)		(1,421)
Purchase and Retirement of Common Stock	(86,345)	(3)	(3,174)	(83,168)
Dividends to Stockholders	(8,453)			(8,453)
Unfunded Pension Liability, net of tax	45				45
Ending Balance at Jun. 30, 2024	1,350,798	338		1,353,788	(3,328)
Beginning balance at Mar. 31, 2024	1,308,535	341		1,311,567	(3,373)
Net Earnings	277,362
Ending Balance at Sep. 30, 2024	1,431,649	335		1,434,597	(3,283)
Beginning balance at Jun. 30, 2024	1,350,798	338		1,353,788	(3,328)
Net Earnings	143,520			143,520
Stock Option Exercises and Restricted Share Vesting	2,149		2,149
Stock Compensation Expense	4,864		4,864
Shares Redeemed to Settle Employee Taxes	(35)		(35)
Purchase and Retirement of Common Stock	(61,293)	(3)	(6,978)	(54,312)
Dividends to Stockholders	(8,399)			(8,399)
Unfunded Pension Liability, net of tax	45				45
Ending Balance at Sep. 30, 2024	1,431,649	335		1,434,597	(3,283)
Beginning balance at Mar. 31, 2025	1,456,700	330		1,459,495	(3,125)
Net Earnings	123,362			123,362
Stock Compensation Expense	4,822		4,822
Shares Redeemed to Settle Employee Taxes	(5,579)	(1)	(4,822)	(756)
Purchase and Retirement of Common Stock	(79,403)	(3)		(79,400)
Dividends to Stockholders	(8,169)			(8,169)
Unfunded Pension Liability, net of tax	41				41
Ending Balance at Jun. 30, 2025	1,491,774	326		1,494,532	(3,084)
Beginning balance at Mar. 31, 2025	1,456,700	330		1,459,495	(3,125)
Net Earnings	260,745
Ending Balance at Sep. 30, 2025	1,537,058	322		1,539,779	(3,043)
Beginning balance at Jun. 30, 2025	1,491,774	326		1,494,532	(3,084)
Net Earnings	137,383			137,383
Stock Option Exercises and Restricted Share Vesting	479		479
Stock Compensation Expense	5,468		5,468
Shares Redeemed to Settle Employee Taxes	(33)		$ (5,947)	5,914
Purchase and Retirement of Common Stock	(89,975)	(4)		(89,971)
Dividends to Stockholders	(8,079)			(8,079)
Unfunded Pension Liability, net of tax	41				41
Ending Balance at Sep. 30, 2025	$ 1,537,058	$ 322		$ 1,539,779	$ (3,043)

- Definition

The portion of profit or loss for the period, net of income taxes, which is attributable to the parent.

+ References

+ Details

- Definition

Amount of equity (deficit) attributable to parent. Excludes temporary equity and equity attributable to noncontrolling interest.

+ References

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+ Details

EQUITY AWARDS

6 Months Ended

Sep. 30, 2025

Share-Based Payment Arrangement [Abstract]

EQUITY AWARDS

(I) EQUITY AWARDS

On August 3, 2023, our stockholders approved the Eagle Materials Inc. 2023 Equity Incentive Plan (the 2023 Plan), which reserves 1,425,000 shares for future grants of stock awards. Under the terms of the 2023 Plan, we can issue equity awards, including stock options, restricted stock units, restricted stock, and stock appreciation rights to employees of the Company, members of the Board of Directors, and consultants, independent contractors, and agents of the Company. The Compensation Committee of our Board of Directors (Compensation Committee) specifies grant terms for awards under the Plan.

Fiscal 2026 Equity Awards

In May 2025, the Compensation Committee awarded to certain officers and key employees an aggregate of 29,273 performance stock units and 14,712 performance stock options, which represents achievement of the target level of performance (collectively, the Performance Stock Awards or PSAs). For the Performance Stock Awards to be earned, the Company must achieve performance vesting criteria as modified based on the Company’s average absolute total stockholder return during the performance period. The performance vesting criteria are based upon certain levels of average annual return on equity (as defined in the Performance Stock Award Agreements) ranging from 10.0% to 20.0% measured at the end of fiscal 2028 (three-year performance period) as modified by total stockholder return. Performance outcomes (taking into account both criteria) will result in a threshold vesting percentage of 50% of target and maximum performance will result in a vesting percentage of 200% of target. If the threshold vesting percentage is not achieved none of the Performance Stock Awards will be earned.

Our Performance Stock Awards are evaluated on a quarterly basis with adjustments to compensation expense based on the likelihood of the performance targets being achieved or exceeded. The maximum expense for our outstanding Performance Stock Awards is approximately $17.4 million. Any forfeitures are recognized as a reduction to expense in the period in which they occur.

The fair value of the above Performance Stock Awards was determined using a Monte Carlo simulation. The following are key inputs in the Monte Carlo analysis for the Fiscal 2026 Employee Performance Stock Awards.



	Fiscal 2026


Measurement Period (in years)		2.86


Risk-Free Interest Rate		4.0	%


Dividend Yield		0.5	%


Volatility		31.3	%


Estimated Fair Value of Market-Based PSAs at Grant Date	$	213.66

In addition to the Performance Stock Awards discussed above, the Compensation Committee approved the granting to certain officers and key employees an aggregate of 14,712 time-vesting stock options which vest ratably over three years (the Fiscal 2026 Employee Time-Vesting Stock Option Grant) and 29,273 shares of time-vesting restricted stock units, which vest ratably over three years (the Fiscal 2026 Employee Restricted Stock Unit Time-Vesting Award). The Fiscal 2026 Employee Restricted Stock Unit Time-Vesting Award was valued at the closing price of the stock on the grant date and is being expensed over a three-year period. The Fiscal 2026 Employee Time-Vesting Stock Option Grant was valued at the grant date using the Black-Scholes option pricing model, which used similar inputs as the Monte Carlo analysis shown above.

In addition to the stock awards described above, we may issue additional equity awards, including stock options, restricted stock, and restricted stock units, to certain employees from time to time. Any options issued are valued using the Black-Scholes options pricing model on the grant date and expensed over the vesting period, while restricted stock and restricted stock units are valued using the closing price on the grant date and expensed over the vesting period.

STOCK OPTIONS

Stock option expense for all outstanding stock option awards totaled approximately $0.5 million and $0.9 million for the three and six months ended September 30, 2025, respectively and $0.3 million and $0.6 million for the three and six months ended September 30, 2024, respectively. At September 30, 2025, there was approximately $3.2 million of unrecognized compensation cost related to outstanding stock options, which is expected to be recognized over a weighted-average period of 2.2 years.

The following table represents stock option activity for the six months ended September 30, 2025:



	Number of Shares				Weighted- Average Exercise Price


Outstanding Options at March 31, 2025		184,233		$		95.75


Granted		29,424		$		213.66


Exercised		(6,003	)	$		79.73


Cancelled		—		$		—


Outstanding Options at September 30, 2025		207,654		$		112.92


Options Exercisable at September 30, 2025		160,325


Weighted-Average Fair Value of Options Granted During the Year				$		90.94

The following table summarizes information about stock options outstanding at September 30, 2025:



	Options Outstanding						Options Exercisable


Range of Exercise Prices	Number of Shares Outstanding		Weighted- Average Remaining Contractual Life (in years)		Weighted- Average Exercise Price		Number of Shares Outstanding		Weighted- Average Exercise Price


$59.32 - $81.28		82,057		4.34	$	61.78		82,057	$	61.78


$91.21 - $100.88		32,852		2.76	$	94.95		32,852	$	94.95


$118.27 - $139.25		48,931		6.61	$	126.59		36,079	$	126.93


$143.09 - $261.76		43,814		2.51	$	206.91		9,337	$	182.32


		207,654		4.24	$	112.92		160,325	$	90.26

At September 30, 2025, the aggregate intrinsic value of the outstanding and exercisable options was approximately $25.0 million and $22.9 million, respectively. The total intrinsic value of options exercised during the six months ended September 30, 2025, was approximately $0.8 million.

RESTRICTED STOCK UNITS AND RESTRICTED STOCK

The following table summarizes the activity for restricted stock units and nonvested restricted stock during the six months ended September 30, 2025:



	Number of Shares				Weighted- Average Grant Date Fair Value


Restricted Stock Units and Nonvested Restricted Stock at March 31, 2025		194,099		$		150.56


Granted		70,167		$		215.28


Vested		(73,347	)	$		107.09


Cancelled		—		$		—


Restricted Stock Units and Nonvested Restricted Stock at September 30, 2025		190,919		$		123.94

Expense related to restricted stock units and restricted stock was approximately $5.0 million and $9.4 million for the three and six months ended September 30, 2025, respectively, and $4.6 million and $8.8 million for the three and six months ended September 30, 2024, respectively. At September 30, 2025, there was approximately $27.8 million of unearned compensation from restricted stock units and nonvested restricted shares, which will be recognized over a weighted-average period of 1.6 years.

The number of shares available for future grants of stock options, restricted stock units, stock appreciation rights, and restricted stock under the Plan was 1,244,080 at September 30, 2025.

Acquisition - Schedule of Revenue and Operating Earnings Related to Business Acquisition (Details) - Western Pennsylvania Acquisition [Member] - USD ($) $ in Thousands	3 Months Ended	6 Months Ended
	Sep. 30, 2025	Sep. 30, 2025
Business Combination [Line Items]
Revenue	$ 9,602	$ 16,804
Operating Earnings	$ 2,739	$ 4,373

- Definition

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

+ References

+ Details

SEGMENT INFORMATION (Tables)

6 Months Ended

Sep. 30, 2025

Segment Reporting [Abstract]

Financial Information Related to Operations by Segment

The following tables set forth certain financial information relating to our operations by segment. We do not allocate interest or taxes at the segment level, only at the consolidated company level.


For the Three Months Ended September 30, 2025 (dollars in thousands)	Cement		Concrete and Aggregates		Gypsum Wallboard		Recycled Paperboard		Total


Revenue from External Customers	$	344,653	$	81,646	$	183,482	$	29,125	$	638,906


Intersegment Revenue		9,904		4,178		—		19,471		33,553


Revenue from Joint Venture		30,312		—		—		—		30,312


	$	384,869	$	85,824	$	183,482	$	48,596	$	702,771


Reconciliation of Revenue


Intersegment Revenue										(33,553	)


Revenue from Joint Venture										(30,312	)


Total Consolidated Revenue									$	638,906



Less:


Freight and Delivery	$	32,726	$	7,997	$	32,567	$	—	$	73,290


Parts, Supplies, and Services (Includes Maintenance)		41,928		13,632		5,257		3,347		64,164


Energy		39,310		2,624		8,516		4,296		54,746


Raw Materials		29,205		31,074		39,750		19,364		119,393


Labor and Fixed Costs		42,596		11,182		15,021		4,998		73,797


Depreciation, Depletion, and Amortization (1)		23,224		7,137		6,494		3,906		40,761


Purchased Cement		21,831		—		—		—		21,831


Other Segment Items		34,275		4,254		8,570		1,669		48,768


Segment Profit	$	119,774	$	7,924	$	67,307	$	11,016	$	206,021



Reconciliation of Segment Profit and Loss


Corporate General and Administrative Expense										(21,316	)


Other Non-Operating Income										1,131


Interest Expense										(9,362	)


Earnings Before Income Taxes									$	176,474


For the Six Months Ended September 30, 2025 (dollars in thousands)	Cement		Concrete and Aggregates		Gypsum Wallboard		Recycled Paperboard		Total


Revenue from External Customers	$	654,979	$	155,362	$	404,998	$	58,257	$	1,273,596


Intersegment Revenue		19,917		8,030		—		41,443		69,390


Revenue from Joint Venture		57,595		—		—		—		57,595


	$	732,491	$	163,392	$	404,998	$	99,700	$	1,400,581


Reconciliation of Revenue


Intersegment Revenue										(69,390	)


Revenue from Joint Venture										(57,595	)


Total Consolidated Revenue									$	1,273,596



Less:


Freight and Delivery	$	60,804	$	14,886	$	71,939	$	—	$	147,629


Parts, Supplies, and Services (Includes Maintenance)		116,634		25,265		10,611		6,457		158,967


Energy		72,090		4,824		17,113		8,374		102,401


Raw Materials		50,365		60,131		86,417		41,258		238,171


Labor and Fixed Costs		87,105		21,205		31,138		10,863		150,311


Depreciation, Depletion, and Amortization (1)		46,062		13,928		13,013		7,578		80,581


Purchased Cement		39,105		—		—		—		39,105


Other Segment Items		59,468		9,054		14,819		4,651		87,992


Segment Profit	$	200,858	$	14,099	$	159,948	$	20,519	$	395,424



Reconciliation of Segment Profit and Loss


Corporate General and Administrative Expense										(42,099	)


Other Non-Operating Income										2,085


Interest Expense										(21,078	)


Earnings Before Income Taxes									$	334,332


For the Three Months Ended September 30, 2024 (dollars in thousands)	Cement		Concrete and Aggregates			Gypsum Wallboard		Recycled Paperboard		Total


Revenue from External Customers	$	313,571	$	65,930		$	214,975	$	29,143	$	623,619


Intersegment Revenue		10,384		4,050			—		21,634		36,068


Revenue from Joint Venture		28,825		—			—		—		28,825


	$	352,780	$	69,980		$	214,975	$	50,777	$	688,512


Reconciliation of Revenue


Intersegment Revenue											(36,068	)


Revenue from Joint Venture											(28,825	)


Total Consolidated Revenue										$	623,619



Less:


Freight and Delivery	$	27,821	$	12,945		$	36,862	$	—	$	77,628


Parts, Supplies, and Services (Includes Maintenance)		47,305		10,699			5,133		2,502		65,639


Energy		39,206		1,809			7,887		3,680		52,582


Raw Materials		23,162		34,135			44,132		27,329		128,758


Labor and Fixed Costs		40,329		7,565			15,631		5,383		68,908


Depreciation, Depletion, and Amortization (1)		22,907		5,283			6,451		3,669		38,310


Purchased Cement		20,739		—			—		—		20,739


Other Segment Items		15,378		(1,461	)		8,738		173		22,828


Segment Profit	$	115,933	$	(995	)	$	90,141	$	8,041	$	213,120



Reconciliation of Segment Profit and Loss


Corporate General and Administrative Expense											(17,879	)


Other Non-Operating Income											724


Interest Expense											(10,714	)


Earnings Before Income Taxes										$	185,251


For the Six Months Ended September 30, 2024 (dollars in thousands)	Cement		Concrete and Aggregates		Gypsum Wallboard		Recycled Paperboard		Total


Revenue from External Customers	$	613,143	$	126,968	$	432,801	$	59,396	$	1,232,308


Intersegment Revenue		20,664		7,827		—		45,621		74,112


Revenue from Joint Venture		58,135		—		—		—		58,135


	$	691,942	$	134,795	$	432,801	$	105,017	$	1,364,555


Reconciliation of Revenue


Intersegment Revenue										(74,112	)


Revenue from Joint Venture										(58,135	)


Total Consolidated Revenue									$	1,232,308



Less:


Freight and Delivery	$	54,969	$	18,977	$	73,347	$	44	$	147,337


Parts, Supplies, and Services (Includes Maintenance)		122,211		18,794		9,063		7,013		157,081


Energy		73,103		3,736		15,484		6,945		99,268

						-
Raw Materials		44,160		64,036		91,203		49,951		249,350


Labor and Fixed Costs		81,950		15,565		31,093		10,844		139,452


Depreciation, Depletion, and Amortization (1)		45,824		9,813		12,924		7,359		75,920


Purchased Cement		41,558		—		—		—		41,558


Other Segment Items		23,109		1,889		15,570		6,317		46,885


Segment Profit	$	205,058	$	1,985	$	184,117	$	16,544	$	407,704



Reconciliation of Segment Profit and Loss


Corporate General and Administrative Expense										(33,528	)


Other Non-Operating Income										3,407


Interest Expense										(21,398	)


Earnings Before Income Taxes									$	356,185

(1) Depreciation, Depletion, and Amortization for corporate assets was $1,228 and $2,052 for the three and six months ended September 30, 2025, respectively, and $767 and $1,507 for the three and six months ended September 30, 2024, respectively.



	For the Three Months Ended September 30,				For the Six Months Ended September 30,


	2025		2024		2025			2024


	(dollars in thousands)				(dollars in thousands)


Capital Expenditures


Cement	$	73,037	$	47,981	$		119,032	$		66,775


Concrete and Aggregates		7,025		7,538			12,628			14,127


Gypsum Wallboard		25,519		4,085			47,514			7,365


Recycled Paperboard		1,622		4,555			2,937			8,116


Corporate and Other		1,335		2,318			2,524			3,222


	$	108,538	$	66,477	$		184,635	$		99,605



						September 30,			March 31,


					2025			2025


						(dollars in thousands)


Segment Assets


Cement					$		2,281,191	$		2,172,459


Concrete and Aggregates							415,480			408,792


Gypsum Wallboard							435,457			429,268


Recycled Paperboard							163,829			166,673


Corporate and Other							113,321			87,396


					$		3,409,278	$		3,264,588




	For the Three Months Ended September 30,				For the Six Months Ended September 30,


	2025		2024		2025			2024


	(dollars in thousands)				(dollars in thousands)


Cement Operating Earnings


Wholly Owned	$	113,465	$	106,657	$		190,745	$		188,066


Joint Venture		6,309		9,276			10,113			16,992


	$	119,774	$	115,933	$		200,858	$		205,058


Cement Sales Volume (M tons)


Wholly Owned		2,021		1,848			3,856			3,615


Joint Venture		175		176			333			356


		2,196		2,024			4,189			3,971

Segment Breakdown of Goodwill

The segment breakdown of Goodwill is as follows:



	September 30,		March 31,


	2025		2025


	(dollars in thousands)


Cement	$	227,639	$	227,639


Concrete and Aggregates		118,877		118,099


Gypsum Wallboard		116,618		116,618


Recycled Paperboard		7,538		7,538


	$	470,672	$	469,894

Summarized Financial Information for Joint Venture Unconsolidated

Summarized financial information for the Joint Venture that is not consolidated is set out below. This summarized financial information includes the total amount for the Joint Venture and not our 50% interest in those amounts.



	For the Three Months Ended September 30,				For the Six Months Ended September 30,


	2025		2024		2025		2024


	(dollars in thousands)				(dollars in thousands)


Revenue	$	60,623	$	57,650	$	115,190	$	116,270


Gross Margin	$	15,369	$	20,370	$	26,311	$	36,794


Earnings Before Income Taxes	$	12,617	$	18,437	$	20,225	$	33,985



	September 30,		March 31,


	2025		2025


	(dollars in thousands)


Current Assets	$	139,086	$	128,384


Noncurrent Assets	$	212,364	$	207,910


Current Liabilities	$	44,239	$	25,618


Noncurrent Liabilities	$	6,462	$	30,152

- Definition

Tabular disclosure of goodwill by reportable segment and in total which includes a rollforward schedule.

+ References

Reference 1: http://www.xbrl.org/2003/role/exampleRef
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+ Details

Computation of Earnings Per Share - Calculation of Basic and Diluted Common Shares Outstanding (Detail) - shares	3 Months Ended		6 Months Ended
	Sep. 30, 2025	Sep. 30, 2024	Sep. 30, 2025	Sep. 30, 2024
Earnings Per Share [Abstract]
Weighted-Average Shares of Common Stock Outstanding	32,297,313	33,431,315	32,459,801	33,581,970
Assumed Exercise of Outstanding Dilutive Options	175,755	239,969	177,256	245,200
Less Shares Repurchased from Proceeds of Assumed Exercised Options	(72,822)	(92,198)	(75,674)	(95,378)
Restricted Stock and Restricted Stock Units	69,587	136,950	76,924	121,911
Weighted-Average Common Stock and Dilutive Securities Outstanding	32,469,833	33,716,036	32,638,307	33,853,703
Shares Excluded Due to Anti-Dilution Effects, Including Contingent Awards	41,982	4,701	34,392	3,332

- Definition

Additional shares included in the calculation of diluted EPS as a result of the potentially dilutive effect of contingently issuable shares. Contingently issuable shares are those shares that are issuable for little or no cash contingent on certain conditions being met.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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+ Details

LEASES (Tables)

6 Months Ended

Sep. 30, 2025

Leases [Abstract]

Schedule of Lease Expense for Operating and Short-Term Leases

Lease expense for our operating and short-term leases is as follows:



	For the Three Months Ended September 30,				For the Six Months Ended September 30,


	2025		2024		2025		2024


	(dollars in thousands)				(dollars in thousands)


Operating Lease Cost	$	2,260	$	1,904	$	4,459	$	3,951


Short-Term Lease Cost		518		304		1,141		645


Total Lease Cost	$	2,778	$	2,208	$	5,600	$	4,596

Schedule of Balance Sheet Information Related to Leases

The Right-of-Use Assets and Lease Liabilities are reflected on our Balance Sheet as follows:



	September 30,		March 31,


	2025		2025


	(dollars in thousands)


Operating Leases:


Operating Lease Right-of-Use Assets	$	30,991	$	29,313





Current Operating Lease Liabilities	$	4,522	$	4,032


Noncurrent Operating Lease Liabilities		34,248		33,597


Total Operating Lease Liabilities	$	38,770	$	37,629

Schedule of Future Payments for Operating Leases

Future payments for operating leases are as follows:



	Amount
Fiscal Year	(dollars in thousands)


2026 (remaining six months)	$	2,890


2027		5,227


2028		4,467


2029		4,044


2030		4,130


Thereafter		30,037


Total Lease Payments	$	50,795


Less: Imputed Interest		(12,025	)


Present Value of Lease Liabilities	$	38,770





Weighted-Average Remaining Lease Term (in years)		11.8


Weighted-Average Discount Rate		4.43	%

Leases - Additional Information (Detail)	Jun. 30, 2025
Minimum [Member]
Lessee Lease Description [Line Items]
Operating lease term	1 year
Maximum [Member]
Lessee Lease Description [Line Items]
Operating lease term	20 years

ACCRUED EXPENSES

6 Months Ended

Sep. 30, 2025

Payables and Accruals [Abstract]

ACCRUED EXPENSES

(G) ACCRUED EXPENSES

Accrued Expenses consist of the following:


	September 30,		March 31,


	2025		2025


	(dollars in thousands)


Payroll and Incentive Compensation	$	29,183	$	31,918


Benefits		16,880		16,950


Interest		6,470		7,689


Dividends		8,289		8,463


Property Taxes		10,620		5,836


Power and Fuel		2,690		4,045


Freight		4,810		3,664


Excise Tax		2,911		3,822


Legal and Professional		4,152		3,953


Sales and Use Tax		2,501		1,500


Other		4,317		8,237


	$	92,823	$	96,077

SUPPLEMENTAL CASH FLOW INFORMATION

6 Months Ended

Sep. 30, 2025

Supplemental Cash Flow Elements [Abstract]

SUPPLEMENTAL CASH FLOW INFORMATION

(B) SUPPLEMENTAL CASH FLOW INFORMATION

Supplemental cash flow information is as follows:



	For the Six Months Ended September 30,


	2025			2024


		(dollars in thousands)


Cash Payments:


Interest	$		24,504	$	19,058


Income Taxes			53,265		10,778


Operating Cash Flows Used for Operating Leases			2,968		4,550





Noncash Financing Activities:


Right-of-Use Assets Obtained for Capitalized Operating Leases	$		3,325	$	719


Excise Tax on Share Repurchases			1,678		1,462

Supplemental Cash Flow Information (Detail) - USD ($) $ in Thousands	6 Months Ended
	Sep. 30, 2025	Sep. 30, 2024
Cash Payments:
Interest	$ 24,504	$ 19,058
Income Taxes	53,265	10,778
Operating Cash Flows Used for Operating Leases	2,968	4,550
Noncash Financing Activities:
Right-of-Use Assets Obtained for Capitalized Operating Leases	3,325	719
Excise Tax on Share Repurchases	$ 1,678	$ 1,462

EQUITY AWARDS (Tables)

6 Months Ended

Sep. 30, 2025

Share-Based Compensation Arrangement by Share-Based Payment Award [Line Items]

Stock Option Activity

The following table represents stock option activity for the six months ended September 30, 2025:



	Number of Shares				Weighted- Average Exercise Price


Outstanding Options at March 31, 2025		184,233		$		95.75


Granted		29,424		$		213.66


Exercised		(6,003	)	$		79.73


Cancelled		—		$		—


Outstanding Options at September 30, 2025		207,654		$		112.92


Options Exercisable at September 30, 2025		160,325


Weighted-Average Fair Value of Options Granted During the Year				$		90.94

Stock Options Outstanding

The following table summarizes information about stock options outstanding at September 30, 2025:



	Options Outstanding						Options Exercisable


Range of Exercise Prices	Number of Shares Outstanding		Weighted- Average Remaining Contractual Life (in years)		Weighted- Average Exercise Price		Number of Shares Outstanding		Weighted- Average Exercise Price


$59.32 - $81.28		82,057		4.34	$	61.78		82,057	$	61.78


$91.21 - $100.88		32,852		2.76	$	94.95		32,852	$	94.95


$118.27 - $139.25		48,931		6.61	$	126.59		36,079	$	126.93


$143.09 - $261.76		43,814		2.51	$	206.91		9,337	$	182.32


		207,654		4.24	$	112.92		160,325	$	90.26

Summary of Activity for Restricted Stock Units and Nonvested Restricted Stock

The following table summarizes the activity for restricted stock units and nonvested restricted stock during the six months ended September 30, 2025:



	Number of Shares				Weighted- Average Grant Date Fair Value


Restricted Stock Units and Nonvested Restricted Stock at March 31, 2025		194,099		$		150.56


Granted		70,167		$		215.28


Vested		(73,347	)	$		107.09


Cancelled		—		$		—


Restricted Stock Units and Nonvested Restricted Stock at September 30, 2025		190,919		$		123.94

Fiscal 2026 Employee Performance Stock Awards [Member]

Share-Based Compensation Arrangement by Share-Based Payment Award [Line Items]

Weighted-Average Assumptions Used to Value Option Awards



	Fiscal 2026


Measurement Period (in years)		2.86


Risk-Free Interest Rate		4.0	%


Dividend Yield		0.5	%


Volatility		31.3	%


Estimated Fair Value of Market-Based PSAs at Grant Date	$	213.66

- Definition

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 718
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Reference 2: http://www.xbrl.org/2003/role/disclosureRef
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Reference 13: http://www.xbrl.org/2003/role/disclosureRef
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Reference 14: http://www.xbrl.org/2003/role/disclosureRef
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Reference 28: http://www.xbrl.org/2003/role/disclosureRef
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Reference 29: http://www.xbrl.org/2003/role/disclosureRef
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Reference 30: http://www.xbrl.org/2003/role/disclosureRef
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+ Details

LONG-TERM DEBT

6 Months Ended

Sep. 30, 2025

Debt Disclosure [Abstract]

LONG-TERM DEBT

(M) LONG-TERM DEBT

Long-Term Debt at September 30, 2025 was as follows:



		September 30,				March 31,


	2025				2025


	(dollars in thousands)


Revolving Credit Facility	$		255,000		$		200,000


2.500% Senior Unsecured Notes Due 2031			750,000				750,000


Term Loan			288,750				296,250


Total Debt			1,293,750				1,246,250


Less: Current Portion of Long-Term Debt			(15,000	)			(15,000	)


Less: Unamortized Discount and Debt Issuance Costs			(7,300	)			(7,934	)


Long-Term Debt	$		1,271,450		$		1,223,316

Revolving Credit Facility

We have an unsecured $750.0 million revolving credit facility (the Revolving Credit Facility), which includes a separate $300.0 million term loan facility (the Term Loan). The Revolving Credit Facility also provides the Company the option to increase the borrowing capacity by up to $375.0 million (for a total borrowing capacity of $1,125.0 million), provided the existing lenders, or new lenders, agree to such increase. The Revolving Credit

Facility includes a $40.0 million letter of credit facility and a swingline loan sub-facility of $25.0 million, and expires on February 4, 2030.

The Revolving Credit Facility contains customary covenants for an unsecured investment-grade facility, including covenants that restrict the Company’s and/or its subsidiaries’ ability to incur additional debt; encumber assets; merge with or transfer or sell assets to other persons; and enter into certain affiliate transactions. The Revolving Credit Facility also requires the Company to maintain at the end of each fiscal quarter a Leverage Ratio of 3.50:1.00 or less and an Interest Coverage Ratio (both ratios, as defined in the Revolving Credit Facility) equal to or greater than 2.50 to 1.00 (collectively, the Financial Covenants).

At the Company’s option, outstanding loans under the Revolving Credit Facility bear interest, at a variable rate equal to either (i) the adjusted term SOFR rate (secured overnight financing rate), plus 10 basis points, plus an agreed spread (ranging from 100 to 162.5 basis points, which is established based on the Company's credit rating); (ii) in respect of any Revolving Loans (until such time as the then-existing Benchmark (as defined in the Revolving Credit Facility) is replaced in accordance with the Revolving Credit Facility), the adjusted daily simple SOFR rate, plus 10 basis points, plus an agreed spread (ranging from 100 to 162.5 basis points, which is established based on the Company's credit rating) or (iii) an Alternate Base Rate (as defined in the Revolving Credit Facility), which is the highest of (a) the Prime Rate (as defined in the Revolving Credit Facility) in effect on any applicable day, (b) the NYFRB Rate (as defined in the Revolving Credit Facility) in effect on any applicable day, plus ½ of 1%, and (c) the Adjusted Term SOFR (as defined in the Revolving Credit Facility) for a one-month interest period on any applicable day, or if such day is not a business day, the immediately preceding business day, plus 1.0%, in each case plus an agreed upon spread (ranging from 0 to 62.5 basis points), which is established quarterly based on the Company's credit rating. The Company is also required to pay a facility fee on unused available borrowings under the Revolving Credit Facility ranging from 9 to 22.5 basis points, which is established based on the Company's then credit rating.

The Company pays each lender a participation fee with respect to such lender’s participations in letters of credit, which fee accrues at the same Applicable Rate (as defined in the Revolving Credit Facility) used to determine the interest rate applicable to Eurodollar Revolving Loans (as defined in the Revolving Credit Facility), plus a fronting fee for each letter of credit issued by the issuing bank in an amount equal to 12.5 basis points per annum on the daily maximum amount then available to be drawn under such letter of credit. The Company also pays each issuing bank such bank’s standard fees with respect to issuance, amendment or extensions of letters of credit and other processing fees, and other standard costs and charges relating to such issuing bank’s letters of credit from time to time.

There was $255.0 million of outstanding borrowings under the Revolving Credit Facility, plus $9.9 million outstanding letters of credit as of September 30, 2025, leaving us with $485.1 million of available borrowings under the Revolving Credit Facility, net of the outstanding letters of credit. We were in compliance with all Financial Covenants on September 30, 2025; therefore, the entire $485.1 million is available for future borrowings.

Term Loan

On February 4, 2025, we increased our Term Loan borrowings under the Revolving Credit Facility to $300.0 million, and used these proceeds to, among other things, pay down a portion of the Revolving Credit Facility. The Term Loan requires quarterly principal payments of approximately $3.8 million, with any unpaid amounts due upon maturity on February 4, 2030. At the Company’s option, principal amounts outstanding under the Term Loan bear interest as set forth in the Revolving Credit Facility (but not, for the avoidance of doubt, at a daily simple SOFR rate unless and until such time as the then-existing Benchmark (as defined in the Revolving Credit Facility) is replaced in accordance with the Revolving Credit Facility).

2.500% Senior Unsecured Notes Due 2031

On July 1, 2021, we issued $750.0 million aggregate principal amount of 2.500% senior notes due July 2031 (the 2.500% Senior Unsecured Notes). The 2.500% Senior Unsecured Notes are senior unsecured obligations of the Company and are not guaranteed by any of our subsidiaries. The 2.500% Senior Unsecured Notes were issued net of original issue discount of $6.3 million and have an effective interest rate of approximately 2.6%. The original issue discount is being amortized by the effective interest method over the 10-year term of the notes. The 2.500% Senior Unsecured Notes are redeemable prior to April 1, 2031, at a redemption price equal to 100% of the aggregate principal amount of the 2.500% Senior Unsecured Notes being redeemed, plus the present value of remaining scheduled payments of principal and interest from the applicable redemption date to April 1, 2031, discounted to the redemption date on a semi-annual basis at the Treasury rate plus 20 basis points. The 2.500% Senior Unsecured Notes are redeemable on or after April 1, 2031, at a redemption price equal to 100% of the aggregate principal amount of the 2.500% Senior Unsecured Notes being redeemed, plus accrued and unpaid interest to, but excluding, the applicable redemption date. If we experience certain change of control triggering events, we would be required to offer to repurchase the 2.500% Senior Unsecured Notes at a purchase price equal to 101% of the aggregate principal amount of the 2.500% Senior Unsecured Notes being repurchased, plus accrued and unpaid interest to, but excluding, the applicable redemption date. The indenture governing the 2.500% Senior Unsecured Notes contains certain covenants that limit our ability to create or permit to exist certain liens; enter into sale and leaseback transactions; and consolidate, merge, or transfer all or substantially all of our assets, and provides for certain events of default that, if any occurred, would permit or require the principal of and accrued interest on the 2.500% Senior Unsecured Notes to become or be declared due and payable.

Segment Information - Segment Breakdown of Goodwill (Detail) - USD ($) $ in Thousands	Sep. 30, 2025	Mar. 31, 2025
Segment Reporting Information [Line Items]
Goodwill	$ 470,672	$ 469,894
Cement [Member]
Segment Reporting Information [Line Items]
Goodwill	227,639	227,639
Concrete and Aggregates [Member]
Segment Reporting Information [Line Items]
Goodwill	118,877	118,099
Gypsum Wallboard [Member]
Segment Reporting Information [Line Items]
Goodwill	116,618	116,618
Recycled Paperboard [Member]
Segment Reporting Information [Line Items]
Goodwill	$ 7,538	$ 7,538

- Definition

Amount, after accumulated impairment loss, of asset representing future economic benefit arising from other asset acquired in business combination or from joint venture formation or both, that is not individually identified and separately recognized.

+ References

Reference 1: http://www.xbrl.org/2003/role/exampleRef
-Topic 350
-SubTopic 20
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-URI https://asc.fasb.org/1943274/2147478546/942-210-S99-1

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+ Details

INVENTORIES (Tables)

6 Months Ended

Sep. 30, 2025

Inventory Disclosure [Abstract]

Schedule of Inventories

Inventories consist of the following:



	September 30,		March 31,


		2025		2025


	(dollars in thousands)


Raw Materials and Materials-in-Progress	$	141,042	$	164,683


Finished Cement		48,292		67,711


Aggregates		15,157		17,681


Gypsum Wallboard		5,543		5,708


Recycled Paperboard		10,024		7,814


Repair Parts and Supplies		128,706		126,983


Fuel and Coal		21,443		24,595


	$	370,207	$	415,175

Equity Awards - Weighted-Average Assumptions Used to Value Option Awards (Detail) - Fiscal 2026 Employee Performance Stock Awards [Member]	6 Months Ended
	Sep. 30, 2025 $ / shares
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Measurement Period / Expected Life	2 years 10 months 9 days
Risk-Free Interest Rate	4.00%
Dividend Yield	0.50%
Expected Volatility	31.30%
Estimated Fair Value of Market-Based PSAs at Grant Date	$ 213.66

- Definition

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

+ References

+ Details

Commitments and Contingencies - Additional Information (Detail)	Sep. 30, 2025 USD ($)
Commitments and Contingencies Disclosure [Abstract]
Letters of credit outstanding, amount	$ 9,900,000
Outstanding guarantees	0
Contingently liable for performance, current	$ 47,900,000

Leases - Schedule of Lease Expense for Operating and Short-Term Leases (Detail) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Sep. 30, 2025	Sep. 30, 2024	Sep. 30, 2025	Sep. 30, 2024
Leases [Abstract]
Operating Lease Cost	$ 2,260	$ 1,904	$ 4,459	$ 3,951
Short-Term Lease Cost	518	304	1,141	645
Total Lease Cost	$ 2,778	$ 2,208	$ 5,600	$ 4,596

Accrued Expenses - Schedule of Accrued Expenses (Detail) - USD ($) $ in Thousands	Sep. 30, 2025	Mar. 31, 2025
Accounts Payable and Accrued Liabilities, Current [Abstract]
Payroll and Incentive Compensation	$ 29,183	$ 31,918
Benefits	16,880	16,950
Interest	6,470	7,689
Dividends	8,289	8,463
Property Taxes	10,620	5,836
Power and Fuel	2,690	4,045
Freight	4,810	3,664
Excise Tax	2,911	3,822
Legal and Professional	4,152	3,953
Sales and Use Tax	2,501	1,500
Other	4,317	8,237
Accrued Expenses, Total	$ 92,823	$ 96,077

Long-Term Debt - Long-Term Debt (Detail) - USD ($) $ in Thousands	Sep. 30, 2025	Mar. 31, 2025	Jul. 01, 2021
Debt Instrument [Line Items]
Revolving Credit Facility	$ 255,000	$ 200,000
Long-Term Debt, Gross, Total	1,293,750	1,246,250
Less: Current Portion of Long-Term Debt	(15,000)	(15,000)
Less: Unamortized Discounts and Debt Issuance Costs	(7,300)	(7,934)
Long-Term Debt	1,271,450	1,223,316
2.500% Senior Unsecured Notes Due 2031 [Member]
Debt Instrument [Line Items]
Long-Term Debt, Gross, Total	750,000	750,000	$ 750,000
Term Loan [Member]
Debt Instrument [Line Items]
Long-Term Debt, Gross, Total	$ 288,750	$ 296,250

- Definition

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

+ References

+ Details

- Definition

Amount of unamortized debt discount (premium) and debt issuance costs.

+ References + Details

- Definition

The carrying value as of the balance sheet date of the current and noncurrent portions of long-term obligations drawn from a line of credit, which is a bank's commitment to make loans up to a specific amount. Examples of items that might be included in the application of this element may consist of letters of credit, standby letters of credit, and revolving credit arrangements, under which borrowings can be made up to a maximum amount as of any point in time conditional on satisfaction of specified terms before, as of and after the date of drawdowns on the line. Includes short-term obligations that would normally be classified as current liabilities but for which (a) postbalance sheet date issuance of a long term obligation to refinance the short term obligation on a long term basis, or (b) the enterprise has entered into a financing agreement that clearly permits the enterprise to refinance the short-term obligation on a long term basis and the following conditions are met (1) the agreement does not expire within 1 year and is not cancelable by the lender except for violation of an objectively determinable provision, (2) no violation exists at the BS date, and (3) the lender has entered into the financing agreement is expected to be financially capable of honoring the agreement.

+ References + Details

ACQUISITION

6 Months Ended

Sep. 30, 2025

Business Combination [Abstract]

ACQUISITION

On January 7, 2025, we purchased Bullskin Stone & Lime LLC, an aggregates business located in Western Pennsylvania (the Acquisition) for approximately $149.9 million, which was accounted for under the acquisition method. The purchase price was funded through borrowings under our Revolving Credit Facility. Operations related to the Acquisition are included in the Concrete and Aggregates segment of our segment reporting.

The following table summarizes the allocation of the purchase price to the fair value of assets acquired and liabilities assumed (based on Level 3 inputs of the fair value hierarchy) as of September 30, 2025.


		Fair Value
	(dollars in thousands)


Accounts Receivable	$		1,443


Inventories			3,354


Prepaid and Other Current Assets			229


Property, Plant, and Equipment			35,097


Intangible Assets			38,600


Accounts Payable and Accrued Liabilities			(327	)


Other Long-Term Liabilities			(792	)


Total Net Assets Acquired			77,604


Goodwill			72,343


Total Purchase Price	$		149,947

The estimated useful lives assigned to Property, Plant, and Equipment range from 5 to 30 years. Goodwill represents the excess purchase price over the fair value of the assets acquired and the liabilities assumed. The

Goodwill was generated by the availability of co-product sales and the opportunity associated with the expansion of our Aggregates business to the Western Pennsylvania region of the United States. All Goodwill generated from the Acquisition is deductible for income tax purposes.

The following table is a summary of the fair value estimates of the identifiable intangible assets and their weighted-average useful lives:


	Weighted-Average Life (in years)		Fair Value (dollars in thousands)


Customer Relationships		15	$	38,100


Trade Name and Technology		5		500


Total Intangible Assets			$	38,600

The following table presents the Revenue and Operating Earnings related to the Acquisition that have been included in our Consolidated Statement of Earnings for the three and six months ended September 30, 2025.



	For the Three Months Ended September 30, 2025		For the Six Months Ended September 30, 2025


	(dollars in thousands)		(dollars in thousands)


Revenue	$	9,602	$	16,804


Operating Earnings	$	2,739	$	4,373

Included in Operating Earnings shown above is approximately $1.7 million and $3.4 million related to depreciation and amortization for the three and six months ended September 30, 2025, respectively.

- Definition

The entire disclosure for business combination.

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+ Details

COMPUTATION OF EARNINGS PER SHARE (Tables)

6 Months Ended

Sep. 30, 2025

Earnings Per Share [Abstract]

Calculation of Basic and Diluted Common Shares Outstanding

The calculation of basic and diluted common shares outstanding is as follows:



	For the Three Months Ended September 30,						For the Six Months Ended September 30,


	2025			2024			2025			2024


Weighted-Average Shares of Common Stock Outstanding		32,297,313			33,431,315			32,459,801			33,581,970


Effect of Dilutive Shares:


Assumed Exercise of Outstanding Dilutive Options		175,755			239,969			177,256			245,200


Less Shares Repurchased from Proceeds of Assumed Exercised Options		(72,822	)		(92,198	)		(75,674	)		(95,378	)


Restricted Stock and Restricted Stock Units		69,587			136,950			76,924			121,911


Weighted-Average Common Stock and Dilutive Securities Outstanding		32,469,833			33,716,036			32,638,307			33,853,703


Shares Excluded Due to Anti-Dilution Effects, Including Contingent Awards		41,982			4,701			34,392			3,332

Document and Entity Information - shares	6 Months Ended
Document and Entity Information - shares	Sep. 30, 2025	Oct. 27, 2025
Document Information [Line Items]
Document Type	10-Q
Amendment Flag	false
Document Period End Date	Sep. 30, 2025
Document Fiscal Year Focus	2026
Document Fiscal Period Focus	Q2
Entity Registrant Name	EAGLE MATERIALS INC.
Entity Central Index Key	0000918646
Entity Current Reporting Status	Yes
Entity Interactive Data Current	Yes
Current Fiscal Year End Date	--03-31
Entity Filer Category	Large Accelerated Filer
Entity Common Stock, Shares Outstanding		32,063,877
Entity Shell Company	false
Entity Small Business	false
Entity Emerging Growth Company	false
Entity File Number	1-12984
Entity Incorporation, State or Country Code	DE
Entity Tax Identification Number	75-2520779
Entity Address, Address Line One	5960 Berkshire Lane
Entity Address, Address Line Two	Suite 900
Entity Address, City or Town	Dallas
Entity Address, State or Province	TX
Entity Address, Postal Zip Code	75225
City Area Code	214
Local Phone Number	432-2000
Document Quarterly Report	true
Document Transition Report	false
New York Stock Exchange [Member]
Document Information [Line Items]
Title of 12(b) Security	Common Stock (par value $.01 per share)
Trading Symbol	EXP
Security Exchange Name	NYSE
NYSE Texas, Inc [Member]
Document Information [Line Items]
Title of 12(b) Security	Common Stock (par value $.01 per share)
Trading Symbol	EXP
Security Exchange Name	CHX

INTEREST EXPENSE

6 Months Ended

Sep. 30, 2025

Banking and Thrift, Interest [Abstract]

INTEREST EXPENSE

(O) INTEREST EXPENSE

The following components are included in Interest Expense, net:



	For the Three Months Ended September 30,								For the Six Months Ended September 30,


		2025				2024				2025				2024


	(dollars in thousands)								(dollars in thousands)


Interest Income	$		(363	)	$		(558	)	$		(514	)	$		(740	)


Interest Expense			11,203				11,420				23,942				22,103


Other Expenses			474				474				948				949


Interest Capitalized			(1,952	)			(622	)			(3,298	)			(914	)


Interest Expense, net	$		9,362		$		10,714		$		21,078		$		21,398

Interest Income includes interest earned on investments of excess cash. Components of Interest Expense include interest associated with the Revolving Credit Facility, Term Loan, Senior Unsecured Notes, and commitment fees based on the unused portion of the Revolving Credit Facility. Other Expenses include amortization of debt issuance costs and Revolving Credit Facility costs. Capitalized Interest is related primarily to our long term projects to expand and modernize our Mountain Cement facility in Wyoming, and the modernization of our gypsum wallboard plant in Oklahoma.

- Definition

The entire disclosure for interest income and interest expense for enterprises that derive a significant portion of their revenue from interest collected on investments, loans, and securities.

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+ Details

ACQUISITION (Tables) - Western Pennsylvania Acquisition [Member]

6 Months Ended

Sep. 30, 2025

Business Combination [Line Items]

Schedule of Recognized Identified Assets Acquired and Liabilities Assumed


		Fair Value
	(dollars in thousands)


Accounts Receivable	$		1,443


Inventories			3,354


Prepaid and Other Current Assets			229


Property, Plant, and Equipment			35,097


Intangible Assets			38,600


Accounts Payable and Accrued Liabilities			(327	)


Other Long-Term Liabilities			(792	)


Total Net Assets Acquired			77,604


Goodwill			72,343


Total Purchase Price	$		149,947

Schedule of Fair Value Estimates of Identifiable Intangible Assets

The following table is a summary of the fair value estimates of the identifiable intangible assets and their weighted-average useful lives:


	Weighted-Average Life (in years)		Fair Value (dollars in thousands)


Customer Relationships		15	$	38,100


Trade Name and Technology		5		500


Total Intangible Assets			$	38,600

Schedule of Revenue and Operating Earnings Related to Business Acquisition



	For the Three Months Ended September 30, 2025		For the Six Months Ended September 30, 2025


	(dollars in thousands)		(dollars in thousands)


Revenue	$	9,602	$	16,804


Operating Earnings	$	2,739	$	4,373

- Definition

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

+ References

+ Details

INCOME TAXES

6 Months Ended

Sep. 30, 2025

Income Tax Disclosure [Abstract]

INCOME TAXES

(L) INCOME TAXES

Income Taxes for the interim periods presented have been included in the accompanying financial statements on the basis of an estimated annual effective tax rate. In addition to the amount of tax resulting from applying the estimated annual effective tax rate to pre-tax income, we will include, when appropriate, certain items treated as discrete events to arrive at an estimated overall tax amount. The effective tax rate for the six months ended September 30, 2025, was approximately 22%, which is consistent with the tax rate for the six months ended September 30, 2024. The effective tax rate was higher than the U.S. statutory rate of 21% mainly due to state income taxes, partially offset by a benefit recognized related to percentage depletion.

On July 4, 2025, H.R.1 - One Big Beautiful Bill Act (OBBBA) was signed into law. The OBBBA, among other provisions, makes permanent 100% bonus depreciation and restores expensing of domestic research expenditures. Changes in tax laws are recognized in the period of enactment. OBBBA did not have a material impact on the Company’s annual income tax rate or income tax expense, but the bonus depreciation provisions of the act will affect the timing of income tax payments in current and future periods.

- Definition

The entire disclosure for income tax.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 942
-SubTopic 740
-Name Accounting Standards Codification
-Section 50
-Paragraph 1
-Subparagraph (a)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147477617/942-740-50-1

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Topic 235
-SubTopic 10
-Name Accounting Standards Codification
-Section S50
-Paragraph 1
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147480738/235-10-S50-1

Reference 3: http://www.xbrl.org/2003/role/disclosureRef
-Topic 944
-SubTopic 740
-Name Accounting Standards Codification
-Section 50
-Paragraph 1
-Subparagraph (a)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147478822/944-740-50-1

Reference 4: http://www.xbrl.org/2003/role/disclosureRef
-Topic 740
-SubTopic 10
-Name Accounting Standards Codification
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-Paragraph 12
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147482685/740-10-50-12

Reference 5: http://www.xbrl.org/2003/role/exampleRef
-Topic 740
-SubTopic 10
-Name Accounting Standards Codification
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-Paragraph 231
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147482663/740-10-55-231

Reference 6: http://www.xbrl.org/2003/role/disclosureRef
-Topic 740
-SubTopic 10
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-Paragraph 12C
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147482685/740-10-50-12C

Reference 7: http://www.xbrl.org/2003/role/disclosureRef
-Topic 740
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 12B
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147482685/740-10-50-12B

Reference 8: http://www.xbrl.org/2003/role/disclosureRef
-Topic 740
-SubTopic 270
-Name Accounting Standards Codification
-Section 50
-Paragraph 1
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147477891/740-270-50-1

Reference 9: http://www.xbrl.org/2003/role/disclosureRef
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-SubTopic 10
-Name Accounting Standards Codification
-Section S99
-Paragraph 1
-Subparagraph (SAB Topic 6.I.5.Q1)
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Reference 10: http://www.xbrl.org/2003/role/disclosureRef
-Topic 946
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-Name Accounting Standards Codification
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-Publisher FASB
-URI https://asc.fasb.org/1943274/2147480990/946-20-50-13

Reference 11: http://www.xbrl.org/2003/role/disclosureRef
-Topic 235
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Reference 12: http://www.xbrl.org/2003/role/disclosureRef
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Reference 13: http://www.xbrl.org/2003/role/disclosureRef
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Reference 14: http://www.xbrl.org/2003/role/disclosureRef
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Reference 15: http://www.xbrl.org/2003/role/disclosureRef
-Topic 740
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-Publisher FASB
-URI https://asc.fasb.org/1943274/2147482685/740-10-50-17

Reference 16: http://www.xbrl.org/2003/role/disclosureRef
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Reference 17: http://www.xbrl.org/2003/role/disclosureRef
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-Section 50
-Paragraph 2
-Subparagraph (a)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147482603/740-30-50-2

+ Details

Long-Term Debt - Additional Information (Detail) $ in Thousands			3 Months Ended
	Feb. 04, 2025 USD ($)	Jul. 02, 2021 USD ($)	Sep. 30, 2025 USD ($)	Mar. 31, 2025 USD ($)	Jul. 01, 2021 USD ($)
Debt Instrument [Line Items]
Interest coverage ratio		250.00%
Borrowings outstanding under Credit Facility			$ 255,000	$ 200,000
Outstanding letters of credit, amount			9,900
Debt instrument, principal amount			1,293,750	1,246,250
Outstanding borrowings			485,100
Maturity Period 2021 [Member]
Debt Instrument [Line Items]
Unused line of credit commitment fee based on leverage ratio		9.00%
Maximum [Member]
Debt Instrument [Line Items]
Unused line of credit commitment fee based on leverage ratio		22.50%
Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member] \| Minimum [Member] \| Maturity Period 2021 [Member]
Debt Instrument [Line Items]
Variable margin		100.00%
Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member] \| Maximum [Member] \| Maturity Period 2021 [Member]
Debt Instrument [Line Items]
Variable margin		162.50%
NYFRB [Member] \| Minimum [Member]
Debt Instrument [Line Items]
Variable margin		0.00%
NYFRB [Member] \| Maximum [Member]
Debt Instrument [Line Items]
Variable margin		62.50%
Term Loan [Member]
Debt Instrument [Line Items]
Term loan facility, unused borrowing capacity, Amount	$ 300,000
Quarterly principle payments	$ 3,800
Debt instrument, principal amount			288,750	296,250
Maturity date	Feb. 04, 2030
2.500% Senior Unsecured Notes Due 2031 [Member]
Debt Instrument [Line Items]
Effective interest rate					2.60%
Debt instrument, principal amount			$ 750,000	$ 750,000	$ 750,000
Debt instrument, interest rate			2.50%		2.50%
Debt instrument, maturity period		2031-07
Debt instrument, original issue discount					$ 6,300
Interest payment period		10-year
Semi annual basis, treasury rate		20.00%
Percentage of aggregate amount repurchased		101.00%
2.500% Senior Unsecured Notes Due 2031 [Member] \| Redeemable On or After April 1, 2031 [Member]
Debt Instrument [Line Items]
Debt instrument, interest rate					2.50%
Percentage of principal amount redeemable		100.00%
Revolving Credit Facility [Member]
Debt Instrument [Line Items]
Borrowings outstanding under Credit Facility			$ 255,000
Maturity date			Feb. 04, 2030
Outstanding borrowings			$ 485,100
Revolving Credit Facility [Member] \| Minimum [Member]
Debt Instrument [Line Items]
Supplementary leverage ratio					0.035
Revolving Credit Facility [Member] \| Swingline Loan [Member]
Debt Instrument [Line Items]
Line of Credit Facility, Maximum Borrowing Capacity					$ 25,000
Revolving Credit Facility [Member] \| Unsecured Debt
Debt Instrument [Line Items]
Line of Credit Facility, Maximum Borrowing Capacity			$ 750,000
Revolving Credit Facility [Member] \| Term Loan [Member]
Debt Instrument [Line Items]
Line of Credit Facility, Maximum Borrowing Capacity	$ 300,000
Line of Credit \| Maximum [Member]
Debt Instrument [Line Items]
Amount of increase in borrowing capacity		$ 375,000
Line of Credit \| NYFRB [Member]
Debt Instrument [Line Items]
Variable margin		0.50%
Letter of Credit [Member]
Debt Instrument [Line Items]
Line of Credit Facility, Maximum Borrowing Capacity					1,125,000
Letter of Credit Facility					$ 40,000
Unused line of credit commitment fee based on leverage ratio			12.50%
Outstanding letters of credit, amount			$ 9,900

Consolidated Balance Sheets (unaudited) - USD ($) $ in Thousands	Sep. 30, 2025	Mar. 31, 2025
Current Assets
Cash and Cash Equivalents	$ 35,033	$ 20,401
Accounts Receivable, net	250,773	212,332
Inventories	370,207	415,175
Income Tax Receivable	1,725	10,020
Prepaid and Other Assets	13,562	10,729
Total Current Assets	671,300	668,657
Property, Plant, and Equipment, net	1,909,715	1,792,982
Investment in Joint Venture	150,202	140,089
Operating Lease Right-of-Use Assets	30,991	29,313
Goodwill and Intangible Assets, net	590,560	595,752
Other Assets	56,510	37,795
Total Assets	3,409,278	3,264,588
Current Liabilities
Accounts Payable	132,917	129,895
Accrued Liabilities	92,823	96,077
Operating Lease Liabilities	4,522	4,032
Income Taxes Payable	1,949	0
Current Portion of Long-Term Debt	15,000	15,000
Total Current Liabilities	247,211	245,004
Long-Term Debt	1,271,450	1,223,316
Noncurrent Operating Lease Liabilities	34,248	33,597
Other Long-Term Liabilities	66,240	66,029
Deferred Income Taxes	253,071	239,942
Total Liabilities	1,872,220	1,807,888
Stockholders’ Equity
Preferred Stock, Par Value $0.01; Authorized 5,000,000 Shares; None Issued	0	0
Common Stock, Par Value $0.01; Authorized 100,000,000 Shares; Issued and Outstanding 32,202,392 and 32,973,121 Shares, respectively	322	330
Capital in Excess of Par Value	0	0
Accumulated Other Comprehensive Losses	(3,043)	(3,125)
Retained Earnings	1,539,779	1,459,495
Total Stockholders’ Equity	1,537,058	1,456,700
Liabilities and Stockholders' Equity, Total	$ 3,409,278	$ 3,264,588

INVENTORIES

6 Months Ended

Sep. 30, 2025

Inventory Disclosure [Abstract]

INVENTORIES

(F) INVENTORIES

Inventories are stated at the lower of average cost (including applicable material, labor, depreciation, and plant overhead) or net realizable value. Raw Materials and Materials-in-Progress include clinker, which is an intermediary product before it is ground into cement powder. Quantities of Raw Materials and Materials-in-Progress, Aggregates, and Coal inventories, are based on measured volumes, subject to estimation based on the size and location of the inventory piles, and are converted to tonnage using standard inventory density factors. Inventories consist of the following:



	September 30,		March 31,


		2025		2025


	(dollars in thousands)


Raw Materials and Materials-in-Progress	$	141,042	$	164,683


Finished Cement		48,292		67,711


Aggregates		15,157		17,681


Gypsum Wallboard		5,543		5,708


Recycled Paperboard		10,024		7,814


Repair Parts and Supplies		128,706		126,983


Fuel and Coal		21,443		24,595


	$	370,207	$	415,175

Acquisition - Schedule of Fair Value Estimates of Identifiable Intangible Assets (Details) - Western Pennsylvania Acquisition [Member] $ in Thousands	6 Months Ended
	Sep. 30, 2025 USD ($)
Business Combination [Line Items]
Estimated Fair Value	$ 38,600
Customer Relationships [Member]
Business Combination [Line Items]
Weighted-Average Life	15 years
Estimated Fair Value	$ 38,100
Trade Name and Technology [Member]
Business Combination [Line Items]
Weighted-Average Life	5 years
Estimated Fair Value	$ 500

- Definition

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

+ References

+ Details

SUPPLEMENTAL CASH FLOW INFORMATION (Tables)

6 Months Ended

Sep. 30, 2025

Supplemental Cash Flow Elements [Abstract]

Schedule of Supplemental Cash Flow Information

Supplemental cash flow information is as follows:



	For the Six Months Ended September 30,


	2025			2024


		(dollars in thousands)


Cash Payments:


Interest	$		24,504	$	19,058


Income Taxes			53,265		10,778


Operating Cash Flows Used for Operating Leases			2,968		4,550





Noncash Financing Activities:


Right-of-Use Assets Obtained for Capitalized Operating Leases	$		3,325	$	719


Excise Tax on Share Repurchases			1,678		1,462

LONG-TERM DEBT (Tables)

6 Months Ended

Sep. 30, 2025

Debt Instrument [Line Items]

Long-Term Debt

Long-Term Debt at September 30, 2025 was as follows:



		September 30,				March 31,


	2025				2025


	(dollars in thousands)


Revolving Credit Facility	$		255,000		$		200,000


2.500% Senior Unsecured Notes Due 2031			750,000				750,000


Term Loan			288,750				296,250


Total Debt			1,293,750				1,246,250


Less: Current Portion of Long-Term Debt			(15,000	)			(15,000	)


Less: Unamortized Discount and Debt Issuance Costs			(7,300	)			(7,934	)


Long-Term Debt	$		1,271,450		$		1,223,316

- Definition

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

+ References

+ Details

ACCRUED EXPENSES (Tables)

6 Months Ended

Sep. 30, 2025

Payables and Accruals [Abstract]

Schedule of Accrued Expenses

Accrued Expenses consist of the following:


	September 30,		March 31,


	2025		2025


	(dollars in thousands)


Payroll and Incentive Compensation	$	29,183	$	31,918


Benefits		16,880		16,950


Interest		6,470		7,689


Dividends		8,289		8,463


Property Taxes		10,620		5,836


Power and Fuel		2,690		4,045


Freight		4,810		3,664


Excise Tax		2,911		3,822


Legal and Professional		4,152		3,953


Sales and Use Tax		2,501		1,500


Other		4,317		8,237


	$	92,823	$	96,077

Segment Information - Summarized Financial Information for Joint Venture Unconsolidated (Detail) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Sep. 30, 2025	Sep. 30, 2024	Sep. 30, 2025	Sep. 30, 2024	Mar. 31, 2025
Related Party Transaction [Line Items]
Revenue	$ 638,906	$ 623,619	$ 1,273,596	$ 1,232,308
Gross Margin	199,712	203,844	385,311	390,712
Earnings Before Income Taxes	176,474	185,251	334,332	356,185
Current Assets	671,300		671,300		$ 668,657
Current Liabilities	247,211		247,211		245,004
Joint Venture [Member]
Related Party Transaction [Line Items]
Revenue	30,312	28,825	57,595	58,135
Joint Venture [Member] \| Equity Method Investment, Nonconsolidated Investee or Group of Investees [Member]
Related Party Transaction [Line Items]
Revenue	60,623	57,650	115,190	116,270
Gross Margin	15,369	20,370	26,311	36,794
Earnings Before Income Taxes	12,617	$ 18,437	20,225	$ 33,985
Current Assets	139,086		139,086		128,384
Noncurrent Assets	212,364		212,364		207,910
Current Liabilities	44,239		44,239		25,618
Noncurrent Liabilities	$ 6,462		$ 6,462		$ 30,152

Segment Information - Financial Information Related to Operations by Segment (Detail)
$ in Thousands

3 Months Ended

6 Months Ended

Sep. 30, 2025

USD ($)

Sep. 30, 2024

USD ($)

Sep. 30, 2025

USD ($)

Sep. 30, 2024

USD ($)

Mar. 31, 2025

USD ($)

Segment Reporting Information [Line Items]

Revenue

$ 638,906

$ 623,619

$ 1,273,596

$ 1,232,308

Corporate General and Administrative Expense

(21,316)

(17,879)

(42,099)

(33,528)

Other Non-Operating Income

1,131

724

2,085

3,407

Interest Expense, net

(9,362)

(10,714)

(21,078)

(21,398)

Earnings before Income Taxes

176,474

185,251

334,332

356,185

Capital Expenditures

108,538

66,477

184,635

99,605

Depreciation, Depletion, and Amortization

82,633

77,427

Segment Assets

3,409,278

$ 3,264,588

External Customers [Member]

Segment Reporting Information [Line Items]

Revenue

638,906

623,619

1,273,596

1,232,308

Intersegment [Member]

Segment Reporting Information [Line Items]

Revenue

33,553

36,068

69,390

74,112

Joint Venture [Member]

Segment Reporting Information [Line Items]

Revenue

30,312

28,825

57,595

58,135

Operating Segments [Member]

Segment Reporting Information [Line Items]

Revenue

702,771

688,512

1,400,581

1,364,555

Freight and Delivery

73,290

77,628

147,629

147,337

Parts, Supplies, and Services (Includes Maintenance)

64,164

65,639

158,967

157,081

Energy

54,746

52,582

102,401

99,268

Raw Materials

119,393

128,758

238,171

249,350

Labor and Fixed Costs

73,797

68,908

150,311

139,452

Depreciation, Depletion, and Amortization

^[1]

40,761

38,310

80,581

75,920

Purchased Cement

21,831

20,739

39,105

41,558

Other Segment Items

48,768

22,828

87,992

46,885

Segment Profit

206,021

213,120

395,424

407,704

Intersegment Eliminations [Member]

Segment Reporting Information [Line Items]

Revenue

(33,553)

(36,068)

(69,390)

(74,112)

Consolidation, Eliminations [Member]

Segment Reporting Information [Line Items]

Revenue

(30,312)

(28,825)

(57,595)

(58,135)

Cement [Member] | External Customers [Member]

Segment Reporting Information [Line Items]

Revenue

344,653

313,571

654,979

613,143

Cement [Member] | Intersegment [Member]

Segment Reporting Information [Line Items]

Revenue

9,904

10,384

19,917

20,664

Cement [Member] | Joint Venture [Member]

Segment Reporting Information [Line Items]

Revenue

30,312

28,825

57,595

58,135

Cement [Member] | Operating Segments [Member]

Segment Reporting Information [Line Items]

Revenue

$ 384,869

$ 352,780

$ 732,491

$ 691,942

Cement Sales Volume | kt

2,196

2,024

4,189

3,971

Operating Earnings

$ 119,774

$ 115,933

$ 200,858

$ 205,058

Capital Expenditures

73,037

47,981

119,032

66,775

Freight and Delivery

32,726

27,821

60,804

54,969

Parts, Supplies, and Services (Includes Maintenance)

41,928

47,305

116,634

122,211

Energy

39,310

39,206

72,090

73,103

Raw Materials

29,205

23,162

50,365

44,160

Labor and Fixed Costs

42,596

40,329

87,105

81,950

Depreciation, Depletion, and Amortization

^[1]

23,224

22,907

46,062

45,824

Purchased Cement

21,831

20,739

39,105

41,558

Other Segment Items

34,275

15,378

59,468

23,109

Segment Profit

119,774

$ 115,933

200,858

$ 205,058

Segment Assets

$ 2,281,191

2,172,459

Cement [Member] | Operating Segments [Member] | Wholly-Owned [Member]

Segment Reporting Information [Line Items]

Cement Sales Volume | kt

2,021

1,848

3,856

3,615

Operating Earnings

$ 113,465

$ 106,657

$ 190,745

$ 188,066

Cement [Member] | Operating Segments [Member] | Joint Venture [Member]

Segment Reporting Information [Line Items]

Cement Sales Volume | kt

175

176

333

356

Operating Earnings

$ 6,309

$ 9,276

$ 10,113

$ 16,992

Concrete and Aggregates [Member] | External Customers [Member]

Segment Reporting Information [Line Items]

Revenue

81,646

65,930

155,362

126,968

Concrete and Aggregates [Member] | Intersegment [Member]

Segment Reporting Information [Line Items]

Revenue

4,178

4,050

8,030

7,827

Concrete and Aggregates [Member] | Joint Venture [Member]

Segment Reporting Information [Line Items]

Revenue

Concrete and Aggregates [Member] | Operating Segments [Member]

Segment Reporting Information [Line Items]

Revenue

85,824

69,980

163,392

134,795

Capital Expenditures

7,025

7,538

12,628

14,127

Freight and Delivery

7,997

12,945

14,886

18,977

Parts, Supplies, and Services (Includes Maintenance)

13,632

10,699

25,265

18,794

Energy

2,624

1,809

4,824

3,736

Raw Materials

31,074

34,135

60,131

64,036

Labor and Fixed Costs

11,182

7,565

21,205

15,565

Depreciation, Depletion, and Amortization

^[1]

7,137

5,283

13,928

9,813

Purchased Cement

Other Segment Items

4,254

(1,461)

9,054

1,889

Segment Profit

7,924

(995)

14,099

1,985

Segment Assets

415,480

408,792

Gypsum Wallboard [Member] | External Customers [Member]

Segment Reporting Information [Line Items]

Revenue

183,482

214,975

404,998

432,801

Gypsum Wallboard [Member] | Intersegment [Member]

Segment Reporting Information [Line Items]

Revenue

Gypsum Wallboard [Member] | Joint Venture [Member]

Segment Reporting Information [Line Items]

Revenue

Gypsum Wallboard [Member] | Operating Segments [Member]

Segment Reporting Information [Line Items]

Revenue

183,482

214,975

404,998

432,801

Capital Expenditures

25,519

4,085

47,514

7,365

Freight and Delivery

32,567

36,862

71,939

73,347

Parts, Supplies, and Services (Includes Maintenance)

5,257

5,133

10,611

9,063

Energy

8,516

7,887

17,113

15,484

Raw Materials

39,750

44,132

86,417

91,203

Labor and Fixed Costs

15,021

15,631

31,138

31,093

Depreciation, Depletion, and Amortization

^[1]

6,494

6,451

13,013

12,924

Purchased Cement

Other Segment Items

8,570

8,738

14,819

15,570

Segment Profit

67,307

90,141

159,948

184,117

Segment Assets

435,457

429,268

Recycled Paperboard [Member] | External Customers [Member]

Segment Reporting Information [Line Items]

Revenue

29,125

29,143

58,257

59,396

Recycled Paperboard [Member] | Intersegment [Member]

Segment Reporting Information [Line Items]

Revenue

19,471

21,634

41,443

45,621

Recycled Paperboard [Member] | Joint Venture [Member]

Segment Reporting Information [Line Items]

Revenue

Recycled Paperboard [Member] | Operating Segments [Member]

Segment Reporting Information [Line Items]

Revenue

48,596

50,777

99,700

105,017

Capital Expenditures

1,622

4,555

2,937

8,116

Freight and Delivery

Parts, Supplies, and Services (Includes Maintenance)

3,347

2,502

6,457

7,013

Energy

4,296

3,680

8,374

6,945

Raw Materials

19,364

27,329

41,258

49,951

Labor and Fixed Costs

4,998

5,383

10,863

10,844

Depreciation, Depletion, and Amortization

^[1]

3,906

3,669

7,578

7,359

Purchased Cement

Other Segment Items

1,669

173

4,651

6,317

Segment Profit

11,016

8,041

20,519

16,544

Segment Assets

163,829

166,673

Corporate and Other [Member]

Segment Reporting Information [Line Items]

Capital Expenditures

1,335

$ 2,318

2,524

$ 3,222

Segment Assets

$ 113,321

$ 87,396

[1]	(1) Depreciation, Depletion, and Amortization for corporate assets was $1,228 and $2,052 for the three and six months ended September 30, 2025, respectively, and $767 and $1,507 for the three and six months ended September 30, 2024, respectively.

Leases - Schedule of Balance Sheet Information Related to Leases (Detail) - USD ($) $ in Thousands	Sep. 30, 2025	Jun. 30, 2025	Mar. 31, 2025
Operating Leases:
Operating Lease Right-of-Use Assets	$ 30,991	$ 30,991	$ 29,313
Current Operating Lease Liabilities	4,522	4,522	4,032
Noncurrent Operating Lease Liabilities	$ 34,248	34,248	33,597
Total Operating Lease Liabilities		$ 38,770	$ 37,629

Acquisition - Schedule of Recognized Identified Assets Acquired and Liabilities Assumed (Details) - USD ($) $ in Thousands	Sep. 30, 2025	Mar. 31, 2025
Business Combination [Line Items]
Goodwill	$ 470,672	$ 469,894
Western Pennsylvania Acquisition [Member] \| Level 3 Inputs [Member]
Business Combination [Line Items]
Accounts Receivable	1,443
Inventories	3,354
Prepaid and Other Current Assets	229
Property, Plant, and Equipment	35,097
Intangible Assets	38,600
Accounts Payable and Accrued Liabilities	(327)
Other Long-Term Liabilities	(792)
Total Net Assets Acquired	77,604
Goodwill	72,343
Total Purchase Price	$ 149,947

SEGMENT INFORMATION

6 Months Ended

Sep. 30, 2025

Segment Reporting [Abstract]

SEGMENT INFORMATION

(N) SEGMENT INFORMATION

Operating segments are defined as components of an enterprise that engage in business activities that earn revenue, incur expenses, and prepare separate financial information that is evaluated regularly by our chief operating decision maker (CODM), who is our President and Chief Executive Officer, to assist in allocating resources and assessing performance. This assessment is primarily based on segment earnings from operations, as management believes this is the best metric for segment operating performance. The CODM uses segment profit as part of his review of the monthly operating results on a segment basis. The actual monthly results are reviewed against budgeted amounts as well as the current year reforecast and prior year actual amounts. Interest and taxes are managed on a centralized basis and are not included in segment operating information.

Our business is organized into two sectors, within which there are four reportable business segments. The Heavy Materials sector includes the Cement and Concrete and Aggregates segments. The Light Materials sector includes the Gypsum Wallboard and Recycled Paperboard segments. The Company's operating segments are the same as the Company's reporting segments.

Our primary products, portland cement and gypsum wallboard, are essential for building, expanding, and repairing roads, highways, and residential, commercial and industrial structures across America. We manufacture and sell our products through a network of more than 70 facilities spanning 21 states. Demand for our products is generally cyclical and seasonal, depending on economic and geographic conditions. Our operations are conducted in the United States and include the mining of limestone for the manufacture, production, distribution, and sale of portland cement (a basic construction material that is the essential binding ingredient in concrete); the grinding and sale of slag; the mining of gypsum for the manufacture and sale of gypsum wallboard; the manufacture and sale of recycled paperboard to the gypsum wallboard industry and other paperboard converters; the sale of readymix concrete; and the mining and sale of aggregates (crushed stone, sand, and gravel).

We operate eight modern cement plants, two slag grinding facilities, and over 30 cement distribution terminals. One cement plant, one slag plant, and six terminals are operated though our joint venture located in Buda, Texas (the Joint Venture). Our cement companies focus on the U.S. heartland and operate as an integrated network selling product primarily in California, Colorado, Illinois, Indiana, Iowa, Kansas, Kentucky, Missouri, Nebraska,

Nevada, Ohio, Oklahoma, Tennessee, and Texas. We operate over 25 readymix concrete batch plants and seven aggregates processing plants, with annual production capacity of 9 million tons, in markets that are complementary to our cement network.

We operate five gypsum wallboard plants and a recycled paperboard mill. We distribute gypsum wallboard and recycled paperboard throughout the continental United States, with the exception of the Northeast.

We account for intersegment sales at market prices. For segment reporting purposes only, we proportionately consolidate our 50% share of the Joint Venture Revenue and Operating Earnings, consistent with the way management reports the segments within the Company for making operating decisions and assessing performance.

The following tables set forth certain financial information relating to our operations by segment. We do not allocate interest or taxes at the segment level, only at the consolidated company level.


For the Three Months Ended September 30, 2025 (dollars in thousands)	Cement		Concrete and Aggregates		Gypsum Wallboard		Recycled Paperboard		Total


Revenue from External Customers	$	344,653	$	81,646	$	183,482	$	29,125	$	638,906


Intersegment Revenue		9,904		4,178		—		19,471		33,553


Revenue from Joint Venture		30,312		—		—		—		30,312


	$	384,869	$	85,824	$	183,482	$	48,596	$	702,771


Reconciliation of Revenue


Intersegment Revenue										(33,553	)


Revenue from Joint Venture										(30,312	)


Total Consolidated Revenue									$	638,906



Less:


Freight and Delivery	$	32,726	$	7,997	$	32,567	$	—	$	73,290


Parts, Supplies, and Services (Includes Maintenance)		41,928		13,632		5,257		3,347		64,164


Energy		39,310		2,624		8,516		4,296		54,746


Raw Materials		29,205		31,074		39,750		19,364		119,393


Labor and Fixed Costs		42,596		11,182		15,021		4,998		73,797


Depreciation, Depletion, and Amortization (1)		23,224		7,137		6,494		3,906		40,761


Purchased Cement		21,831		—		—		—		21,831


Other Segment Items		34,275		4,254		8,570		1,669		48,768


Segment Profit	$	119,774	$	7,924	$	67,307	$	11,016	$	206,021



Reconciliation of Segment Profit and Loss


Corporate General and Administrative Expense										(21,316	)


Other Non-Operating Income										1,131


Interest Expense										(9,362	)


Earnings Before Income Taxes									$	176,474


For the Six Months Ended September 30, 2025 (dollars in thousands)	Cement		Concrete and Aggregates		Gypsum Wallboard		Recycled Paperboard		Total


Revenue from External Customers	$	654,979	$	155,362	$	404,998	$	58,257	$	1,273,596


Intersegment Revenue		19,917		8,030		—		41,443		69,390


Revenue from Joint Venture		57,595		—		—		—		57,595


	$	732,491	$	163,392	$	404,998	$	99,700	$	1,400,581


Reconciliation of Revenue


Intersegment Revenue										(69,390	)


Revenue from Joint Venture										(57,595	)


Total Consolidated Revenue									$	1,273,596



Less:


Freight and Delivery	$	60,804	$	14,886	$	71,939	$	—	$	147,629


Parts, Supplies, and Services (Includes Maintenance)		116,634		25,265		10,611		6,457		158,967


Energy		72,090		4,824		17,113		8,374		102,401


Raw Materials		50,365		60,131		86,417		41,258		238,171


Labor and Fixed Costs		87,105		21,205		31,138		10,863		150,311


Depreciation, Depletion, and Amortization (1)		46,062		13,928		13,013		7,578		80,581


Purchased Cement		39,105		—		—		—		39,105


Other Segment Items		59,468		9,054		14,819		4,651		87,992


Segment Profit	$	200,858	$	14,099	$	159,948	$	20,519	$	395,424



Reconciliation of Segment Profit and Loss


Corporate General and Administrative Expense										(42,099	)


Other Non-Operating Income										2,085


Interest Expense										(21,078	)


Earnings Before Income Taxes									$	334,332


For the Three Months Ended September 30, 2024 (dollars in thousands)	Cement		Concrete and Aggregates			Gypsum Wallboard		Recycled Paperboard		Total


Revenue from External Customers	$	313,571	$	65,930		$	214,975	$	29,143	$	623,619


Intersegment Revenue		10,384		4,050			—		21,634		36,068


Revenue from Joint Venture		28,825		—			—		—		28,825


	$	352,780	$	69,980		$	214,975	$	50,777	$	688,512


Reconciliation of Revenue


Intersegment Revenue											(36,068	)


Revenue from Joint Venture											(28,825	)


Total Consolidated Revenue										$	623,619



Less:


Freight and Delivery	$	27,821	$	12,945		$	36,862	$	—	$	77,628


Parts, Supplies, and Services (Includes Maintenance)		47,305		10,699			5,133		2,502		65,639


Energy		39,206		1,809			7,887		3,680		52,582


Raw Materials		23,162		34,135			44,132		27,329		128,758


Labor and Fixed Costs		40,329		7,565			15,631		5,383		68,908


Depreciation, Depletion, and Amortization (1)		22,907		5,283			6,451		3,669		38,310


Purchased Cement		20,739		—			—		—		20,739


Other Segment Items		15,378		(1,461	)		8,738		173		22,828


Segment Profit	$	115,933	$	(995	)	$	90,141	$	8,041	$	213,120



Reconciliation of Segment Profit and Loss


Corporate General and Administrative Expense											(17,879	)


Other Non-Operating Income											724


Interest Expense											(10,714	)


Earnings Before Income Taxes										$	185,251


For the Six Months Ended September 30, 2024 (dollars in thousands)	Cement		Concrete and Aggregates		Gypsum Wallboard		Recycled Paperboard		Total


Revenue from External Customers	$	613,143	$	126,968	$	432,801	$	59,396	$	1,232,308


Intersegment Revenue		20,664		7,827		—		45,621		74,112


Revenue from Joint Venture		58,135		—		—		—		58,135


	$	691,942	$	134,795	$	432,801	$	105,017	$	1,364,555


Reconciliation of Revenue


Intersegment Revenue										(74,112	)


Revenue from Joint Venture										(58,135	)


Total Consolidated Revenue									$	1,232,308



Less:


Freight and Delivery	$	54,969	$	18,977	$	73,347	$	44	$	147,337


Parts, Supplies, and Services (Includes Maintenance)		122,211		18,794		9,063		7,013		157,081


Energy		73,103		3,736		15,484		6,945		99,268

						-
Raw Materials		44,160		64,036		91,203		49,951		249,350


Labor and Fixed Costs		81,950		15,565		31,093		10,844		139,452


Depreciation, Depletion, and Amortization (1)		45,824		9,813		12,924		7,359		75,920


Purchased Cement		41,558		—		—		—		41,558


Other Segment Items		23,109		1,889		15,570		6,317		46,885


Segment Profit	$	205,058	$	1,985	$	184,117	$	16,544	$	407,704



Reconciliation of Segment Profit and Loss


Corporate General and Administrative Expense										(33,528	)


Other Non-Operating Income										3,407


Interest Expense										(21,398	)


Earnings Before Income Taxes									$	356,185



	For the Three Months Ended September 30,				For the Six Months Ended September 30,


	2025		2024		2025			2024


	(dollars in thousands)				(dollars in thousands)


Capital Expenditures


Cement	$	73,037	$	47,981	$		119,032	$		66,775


Concrete and Aggregates		7,025		7,538			12,628			14,127


Gypsum Wallboard		25,519		4,085			47,514			7,365


Recycled Paperboard		1,622		4,555			2,937			8,116


Corporate and Other		1,335		2,318			2,524			3,222


	$	108,538	$	66,477	$		184,635	$		99,605



						September 30,			March 31,


					2025			2025


						(dollars in thousands)


Segment Assets


Cement					$		2,281,191	$		2,172,459


Concrete and Aggregates							415,480			408,792


Gypsum Wallboard							435,457			429,268


Recycled Paperboard							163,829			166,673


Corporate and Other							113,321			87,396


					$		3,409,278	$		3,264,588




	For the Three Months Ended September 30,				For the Six Months Ended September 30,


	2025		2024		2025			2024


	(dollars in thousands)				(dollars in thousands)


Cement Operating Earnings


Wholly Owned	$	113,465	$	106,657	$		190,745	$		188,066


Joint Venture		6,309		9,276			10,113			16,992


	$	119,774	$	115,933	$		200,858	$		205,058


Cement Sales Volume (M tons)


Wholly Owned		2,021		1,848			3,856			3,615


Joint Venture		175		176			333			356


		2,196		2,024			4,189			3,971

Segment Operating Earnings, including the proportionately consolidated 50% interest in the revenue and expenses of the Joint Venture, represent Revenue, less direct operating expenses, segment Depreciation, and segment Selling, General, and Administrative expenses. We account for intersegment sales at market prices. Corporate assets consist mainly of cash and cash equivalents, general office assets, and miscellaneous other assets.

The basis used to disclose Identifiable Assets; Capital Expenditures; and Depreciation, Depletion, and Amortization conforms with the equity method, and is similar to how we disclose these accounts in our Unaudited Consolidated Balance Sheets and Unaudited Consolidated Statements of Earnings.

The segment breakdown of Goodwill is as follows:



	September 30,		March 31,


	2025		2025


	(dollars in thousands)


Cement	$	227,639	$	227,639


Concrete and Aggregates		118,877		118,099


Gypsum Wallboard		116,618		116,618


Recycled Paperboard		7,538		7,538


	$	470,672	$	469,894



	For the Three Months Ended September 30,				For the Six Months Ended September 30,


	2025		2024		2025		2024


	(dollars in thousands)				(dollars in thousands)


Revenue	$	60,623	$	57,650	$	115,190	$	116,270


Gross Margin	$	15,369	$	20,370	$	26,311	$	36,794


Earnings Before Income Taxes	$	12,617	$	18,437	$	20,225	$	33,985



	September 30,		March 31,


	2025		2025


	(dollars in thousands)


Current Assets	$	139,086	$	128,384


Noncurrent Assets	$	212,364	$	207,910


Current Liabilities	$	44,239	$	25,618


Noncurrent Liabilities	$	6,462	$	30,152

- Definition

The entire disclosure for reporting segments including data and tables. Reportable segments include those that meet any of the following quantitative thresholds a) it's reported revenue, including sales to external customers and intersegment sales or transfers is 10 percent or more of the combined revenue, internal and external, of all operating segments b) the absolute amount of its reported profit or loss is 10 percent or more of the greater, in absolute amount of 1) the combined reported profit of all operating segments that did not report a loss or 2) the combined reported loss of all operating segments that did report a loss c) its assets are 10 percent or more of the combined assets of all operating segments.

+ References

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+ Details

Segment Information - Additional Information (Detail)	6 Months Ended
Segment Information - Additional Information (Detail)	Sep. 30, 2025 Plant Terminal Facility Location Sector Segment MT
Segment Reporting Information [Line Items]
Segment Reporting, CODM, Individual Title and Position or Group Name [Extensible Enumeration]	srt:ChiefExecutiveOfficerMember, srt:PresidentMember
Segment Reporting, CODM, Profit (Loss) Measure, How Used, Description	This assessment is primarily based on segment earnings from operations, as management believes this is the best metric for segment operating performance. The CODM uses segment profit as part of his review of the monthly operating results on a segment basis. The actual monthly results are reviewed against budgeted amounts as well as the current year reforecast and prior year actual amounts. Interest and taxes are managed on a centralized basis and are not included in segment operating information.
Number of sectors \| Sector	2
Number of reportable business segments \| Segment	4
Cement plant locations \| Location	8
Slag grinding facility \| Facility	2
Cement distribution terminals \| Terminal	30
Readymix concrete batch plants	25
Aggregates processing plants	7
Annual production capacity \| MT	9
Gypsum wallboard plants	5
Proportionate consolidation of share of joint venture revenues and operating earnings	50.00%
Texas [Member]
Segment Reporting Information [Line Items]
Cement plant locations \| Location	1
Slag grinding facility \| Facility	1

Insider Trading Arrangements	3 Months Ended
Insider Trading Arrangements	Sep. 30, 2025
Trading Arrangements, by Individual
Rule 10b5-1 Arrangement Adopted	false
Non-Rule 10b5-1 Arrangement Adopted	false
Rule 10b5-1 Arrangement Terminated	false
Non-Rule 10b5-1 Arrangement Terminated	false
Rule 10b5-1 Arrangement Modified	false
Non-Rule 10b5-1 Arrangement Modified	false

COMMITMENTS AND CONTINGENCIES

6 Months Ended

Sep. 30, 2025

Commitments and Contingencies Disclosure [Abstract]

COMMITMENTS AND CONTINGENCIES

(P) COMMITMENTS AND CONTINGENCIES

We have certain deductible limits under our workers’ compensation and liability insurance policies for which reserves are established based on the undiscounted estimated costs of known and anticipated claims. We have entered into standby letter of credit agreements relating to workers’ compensation, auto, and general liability self-insurance. At September 30, 2025, we had contingent liabilities under these outstanding letters of credit of approximately $9.9 million.

In the ordinary course of business, we execute contracts involving indemnifications that are both standard in the industry and specific to a transaction, such as the sale of a business. These indemnifications may include claims relating to any of the following: environmental and tax matters; intellectual property rights; governmental regulations and employment-related matters; customer, supplier, and other commercial contractual relationships; construction contracts; and financial matters. While the maximum amount to which the Company may be exposed under such agreements cannot be estimated, management believes these indemnifications will not have a material adverse effect on our consolidated financial position, results of operations, or cash flows. We currently have no outstanding guarantees.

We are currently contingently liable for performance under $47.9 million in performance bonds required by certain states and municipalities, and their related agencies. The bonds are principally for certain reclamation obligations and mining permits. We have indemnified the underwriting insurance company against any exposure under the performance bonds. In our past experience, no material claims have been made against these financial instruments.

Interest Expense, Net (Detail) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
Interest Expense, Net (Detail) - USD ($) $ in Thousands	Sep. 30, 2025	Sep. 30, 2024	Sep. 30, 2025	Sep. 30, 2024
Interest Income (Expense), Net [Abstract]
Interest Income	$ (363)	$ (558)	$ (514)	$ (740)
Interest Expense	11,203	11,420	23,942	22,103
Other Expenses	474	474	948	949
Interest Capitalized	(1,952)	(622)	(3,298)	(914)
Interest Expense, net	$ 9,362	$ 10,714	$ 21,078	$ 21,398

- Definition

Amount of interest expense classified as operating and nonoperating. Includes, but is not limited to, cost of borrowing accounted for as interest expense.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 280
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 22
-Subparagraph (d)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147482810/280-10-50-22

Reference 2: http://www.xbrl.org/2003/role/exampleRef
-Topic 280
-SubTopic 10
-Name Accounting Standards Codification
-Section 55
-Paragraph 48
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147482785/280-10-55-48

Reference 3: http://www.xbrl.org/2003/role/exampleRef
-Topic 280
-SubTopic 10
-Name Accounting Standards Codification
-Section 55
-Paragraph 49
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147482785/280-10-55-49

Reference 4: http://www.xbrl.org/2003/role/disclosureRef
-Topic 270
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 1
-Subparagraph (i)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147482964/270-10-50-1

Reference 5: http://www.xbrl.org/2003/role/disclosureRef
-Topic 280
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 32
-Subparagraph (ee)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147482810/280-10-50-32

Reference 6: http://www.xbrl.org/2003/role/disclosureRef
-Topic 280
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 24
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147482810/280-10-50-24

Reference 7: http://www.xbrl.org/2003/role/disclosureRef
-Topic 280
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 22
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147482810/280-10-50-22

Reference 8: http://www.xbrl.org/2003/role/disclosureRef
-Topic 835
-SubTopic 20
-Name Accounting Standards Codification
-Section 50
-Paragraph 1
-Subparagraph (a)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147483013/835-20-50-1

Reference 9: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 946
-SubTopic 220
-Name Accounting Standards Codification
-Section 45
-Paragraph 3
-Subparagraph (i)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147479105/946-220-45-3

+ Details