Consolidated Statements of Earnings - USD ($) $ in Thousands	12 Months Ended
	Mar. 31, 2023	Mar. 31, 2022	Mar. 31, 2021
Income Statement [Abstract]
Revenue	$ 2,148,069	$ 1,861,522	$ 1,622,642
Cost of good sold	1,508,803	1,341,908	1,214,287
Gross Profit	639,266	519,614	408,355
Equity in Earnings of Unconsolidated Joint Venture	35,474	32,488	37,441
Corporate General and Administrative Expense	(53,630)	(46,801)	(49,511)
Loss on Early Retirement of Senior Notes	0	(8,407)	0
Gain on Sale of Businesses	0	0	51,973
Other Nonoperating Income	2,654	9,073	20,274
Interest Expense, net	(35,171)	(30,873)	(44,420)
Earnings from Continuing Operations Before Income Taxes	588,593	475,094	424,112
Income Taxes	(127,053)	(100,847)	(89,946)
Earnings from Continuing Operations	461,540	374,247	334,166
Earnings from Discontinued Operations, net of Income Taxes	0	0	5,278
Net Earnings	$ 461,540	$ 374,247	$ 339,444
BASIC EARNINGS PER SHARE
Continuing Operations	$ 12.54	$ 9.23	$ 8.04
Discontinued Operations	0	0	0.13
Net Earnings	12.54	9.23	8.17
DILUTED EARNINGS PER SHARE
Continuing Operations	12.46	9.14	7.99
Discontinued Operations	0	0	0.13
Net Earnings	$ 12.46	$ 9.14	$ 8.12
AVERAGE SHARES OUTSTANDING
Basic	36,798,354	40,547,048	41,543,067
Diluted	37,052,942	40,929,712	41,826,709
CASH DIVIDENDS PER SHARE	$ 1.00	$ 0.75	$ 0.10