SIGNIFICANT ACCOUNTING POLICIES (Tables)

12 Months Ended

Mar. 31, 2025

Accounting Policies [Abstract]

Schedule of Inventories

Inventories consist of the following:

	March 31,
		2025		2024
	(dollars in thousands)
Raw Materials and Materials-in-Progress	$	164,683	$	122,772
Finished Cement		67,711		71,396
Aggregates		17,681		12,149
Gypsum Wallboard		5,708		5,242
Recycled Paperboard		7,814		14,278
Repair Parts and Supplies		126,983		127,511
Fuel and Coal		24,595		20,575
	$	415,175	$	373,923

Schedule of Property, Plant and Equipment Estimated Useful Lives

The estimated useful lives of the related assets are as follows:

Plants	20 to 30 years
Buildings	20 to 40 years
Machinery and Equipment	3 to 25 years

Schedule of Intangible Assets, Including Impact of Impairment Charge

Goodwill and Intangible Assets at March 31, 2025, and 2024, consist of the following:

	March 31, 2025
	Amortization Period	Cost		Additions		Accumulated Amortization			Net
	(dollars in thousands)
Goodwill and Intangible Assets:
Customer Contracts and Relationships	15 years	$	157,294	$	40,209		(89,444	)	$	108,059
Permits	25-40 years		30,760		—		(14,358	)		16,402
Trade Name	15 years		1,900		500		(1,003	)		1,397
Goodwill			392,569		77,325		—			469,894
Total Goodwill and Intangible Assets		$	582,523	$	118,034	$	(104,805	)	$	595,752

	March 31, 2024
	Amortization Period		Cost			Additions			Accumulated Amortization				Net
	(dollars in thousands)
Goodwill and Intangible Assets:
Customer Contracts and Relationships	15 years	$		141,194	$		16,100	$		(82,077	)	$		75,217
Permits	25-40 years			30,760			—			(13,413	)			17,347
Trade Name	15 years			1,900			—			(916	)			984
Goodwill				380,711			11,858			—				392,569
Total Goodwill and Intangible Assets		$		554,565	$		27,958	$		(96,406	)	$		486,117

Schedule of Supplemental Cash Flow Information

Supplemental cash flow information is as follows:

	For the Years Ended March 31,
	2025			2024		2023
		(dollars in thousands)
Cash Payments:
Interest	$		42,368	$	43,663	$	31,596
Income Taxes			140,786		124,482		131,512
Operating Cash Flows Used for Operating Leases			8,708		9,286		8,314
Noncash Financing Activities:
Right-of-Use Assets Obtained for Capitalized Operating    Leases	$		18,373	$	6,465	$	1,711
Excise Tax on Share Repurchases			2,982		3,432		738

Schedule of Total Selling, General and Administrative Expenses

Total Selling, General, and Administrative Expenses for the past three fiscal years are summarized as follows:

	For the Years Ended March 31,
	2025		2024		2023
	(dollars in thousands)
Operating Units Selling, G&A	$	74,713	$	75,001	$	65,468
Corporate G&A		73,942		59,795		53,630
	$	148,655	$	134,796	$	119,098

Schedule of Earnings per Share

	For the Years Ended March 31,
	2025			2024			2023
Weighted-Average Shares of Common Stock Outstanding		33,378,050			34,811,560			36,798,354
Effect of Dilutive Shares:
Assumed Exercise of Outstanding Dilutive Options		218,434			304,889			418,659
Less Shares Repurchased from Proceeds of Assumed Exercised    Options		(82,734	)		(157,457	)		(290,590	)
Restricted Stock and Restricted Stock Units		132,645			138,879			126,519
Weighted-Average Common Stock and Dilutive Securities    Outstanding		33,646,395			35,097,871			37,052,942