Quarterly Results (unaudited) (Detail) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended								12 Months Ended
	Mar. 31, 2022	Dec. 31, 2021	Sep. 30, 2021	Jun. 30, 2021	Mar. 31, 2021	Dec. 31, 2020	Sep. 30, 2020	Jun. 30, 2020	Mar. 31, 2022	Mar. 31, 2021	Mar. 31, 2020
Quarterly Financial Information Disclosure [Abstract]
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
Gross Profit	99,176	138,586	155,341	126,511	69,830	113,379	122,849	102,297	519,614	408,355	342,666
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
Net Earnings from Continuing Operations	74,316	102,479	102,125	95,327	66,011	81,193	89,871	97,091
Net Earnings	$ 74,316	$ 102,479	$ 102,125	$ 95,327	$ 66,011	$ 81,193	$ 96,034	$ 96,206	$ 374,247	$ 339,444	$ 70,894
Continuing Operations	$ 1.90	$ 2.53	$ 2.46	$ 2.25	$ 1.56	$ 1.94	$ 2.16	$ 2.33	$ 9.14	$ 7.99	$ 5.47
Diluted Earnings per Share	$ 1.90	$ 2.53	$ 2.46	$ 2.25	$ 1.56	$ 1.94	$ 2.31	$ 2.31	$ 9.14	$ 8.12	$ 1.68