Summarized Financial Information for Joint Venture Unconsolidated (Detail) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2021	Dec. 31, 2020	Mar. 31, 2021
Related Party Transaction [Line Items]
Revenue	$ 462,941	$ 404,667	$ 1,448,405	$ 1,279,340
Gross Margin	138,586	113,379	420,438	338,525
Earnings Before Income Taxes	131,846	105,072	384,880	344,670
Current Assets	415,347		415,347		$ 661,689
Current Liabilities	193,675		193,675		169,354
Joint Venture [Member] | Equity Method Investment, Nonconsolidated Investee or Group of Investees [Member]
Related Party Transaction [Line Items]
Revenue	54,812	54,220	154,046	159,207
Gross Margin	18,662	22,045	53,271	61,814
Earnings Before Income Taxes	17,111	$ 21,920	49,570	$ 58,665
Current Assets	69,481		69,481		66,871
Noncurrent Assets	112,937		112,937		107,617
Current Liabilities	$ 18,277		$ 18,277		$ 16,390