Financial Information Related to Operations by Segment (Detail) $ in Thousands	3 Months Ended								12 Months Ended
	Mar. 31, 2022 USD ($)	Dec. 31, 2021 USD ($)	Sep. 30, 2021 USD ($)	Jun. 30, 2021 USD ($)	Mar. 31, 2021 USD ($)	Dec. 31, 2020 USD ($)	Sep. 30, 2020 USD ($)	Jun. 30, 2020 USD ($)	Mar. 31, 2022 USD ($) kt	Mar. 31, 2021 USD ($) kt	Mar. 31, 2020 USD ($) kt
Segment Reporting Information [Line Items]
Revenue	$ 413,117	$ 462,941	$ 509,694	$ 475,770	$ 343,302	$ 404,667	$ 447,684	$ 426,989	$ 1,861,522	$ 1,622,642	$ 1,404,033
Less: Joint Venture Revenue									(103,899)	(105,191)	(113,536)
Operating Earnings									552,102	445,796	385,251
Corporate General and Administrative Expense									(46,801)	(49,511)	(65,410)
Loss on Early Retirement of Senior Notes									(8,407)
Gain on Sale of Businesses										51,973
Impairment Losses											(25,131)
Other Non-Operating Income (Loss)									9,073	20,274	(594)
Earnings Before Interest and Income Taxes									505,967	468,532	294,116
Interest Expense, net									(30,873)	(44,420)	(38,421)
Earnings from Continuing Operations Before Income Taxes	90,214	$ 131,846	$ 131,315	$ 121,719	79,442	$ 105,072	$ 109,671	$ 129,927	475,094	424,112	255,695
Capital Expenditures									74,121	53,933	131,973
Depreciation, Depletion, and Amortization									128,811	129,087	113,518
Capital Expenditures											146
Depreciation and Amortization									0	221	11,310
Assets	2,579,652				2,838,681				2,579,652	2,838,681	2,961,020
Assets of Discontinued Operations											13,831
Operating Segments [Member]
Segment Reporting Information [Line Items]
Revenue									2,070,422	1,815,901	1,602,885
Operating Earnings									259,556	233,957	181,330
Depreciation, Depletion, and Amortization									128,811	128,866	102,208
Operating Segments [Member] | Wholly-Owned [Member]
Segment Reporting Information [Line Items]
Operating Earnings									227,068	196,516	138,745
Operating Segments [Member] | Joint Venture [Member]
Segment Reporting Information [Line Items]
Operating Earnings									32,488	37,441	42,585
Intersegment Eliminations [Member]
Segment Reporting Information [Line Items]
Revenue									105,001	88,068	85,316
Revenue									105,001	88,068	85,316
Cement [Member] | Operating Segments [Member]
Segment Reporting Information [Line Items]
Revenue									$ 1,007,094	$ 944,556	$ 752,002
Cement Sales Volume | kt									7,534	7,466	5,931
Operating Earnings									$ 259,556	$ 233,957	$ 181,330
Capital Expenditures									31,535	26,708	44,776
Depreciation, Depletion, and Amortization									79,560	77,524	59,081
Assets	1,860,649				1,898,930				$ 1,860,649	$ 1,898,930	$ 1,980,306
Cement [Member] | Operating Segments [Member] | Wholly-Owned [Member]
Segment Reporting Information [Line Items]
Cement Sales Volume | kt									6,711	6,576	4,975
Cement [Member] | Operating Segments [Member] | Joint Venture [Member]
Segment Reporting Information [Line Items]
Cement Sales Volume | kt									823	890	956
Cement [Member] | Intersegment Eliminations [Member]
Segment Reporting Information [Line Items]
Revenue									$ 22,915	$ 20,862	$ 21,499
Concrete and Aggregates [Member] | Operating Segments [Member]
Segment Reporting Information [Line Items]
Revenue									177,122	168,829	182,775
Operating Earnings									18,467	19,054	17,558
Capital Expenditures									5,239	3,114	11,898
Depreciation, Depletion, and Amortization									9,656	10,807	11,142
Assets	89,405				88,410				89,405	88,410	136,041
Concrete and Aggregates [Member] | Intersegment Eliminations [Member]
Segment Reporting Information [Line Items]
Revenue										106	1,502
Gypsum Wallboard [Member] | Operating Segments [Member]
Segment Reporting Information [Line Items]
Revenue									692,152	539,009	508,145
Operating Earnings									261,476	167,336	154,614
Capital Expenditures									32,405	12,889	12,771
Depreciation, Depletion, and Amortization									22,024	21,646	20,320
Assets	397,486				366,352				397,486	366,352	375,946
Paperboard [Member] | Operating Segments [Member]
Segment Reporting Information [Line Items]
Revenue									194,054	163,507	159,963
Operating Earnings									12,603	25,449	34,979
Other											(3,230)
Capital Expenditures									2,579	11,222	62,528
Depreciation, Depletion, and Amortization									14,721	13,913	8,945
Assets	180,025				186,156				180,025	186,156	183,288
Paperboard [Member] | Intersegment Eliminations [Member]
Segment Reporting Information [Line Items]
Revenue									82,086	67,100	62,315
Corporate and Other [Member]
Segment Reporting Information [Line Items]
Capital Expenditures									2,363
Depreciation, Depletion, and Amortization									2,850	4,976	2,720
Assets	$ 52,087				$ 298,833				$ 52,087	$ 298,833	$ 271,608