Summarized Financial Information for Joint Venture Unconsolidated (Detail) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Sep. 30, 2022	Sep. 30, 2021	Sep. 30, 2022	Sep. 30, 2021	Mar. 31, 2022
Related Party Transaction [Line Items]
Revenue	$ 605,068	$ 509,694	$ 1,166,455	$ 985,464
Gross Margin	194,239	155,341	345,105	281,852
Earnings Before Income Taxes	178,524	131,315	314,703	253,034
Current Assets	552,874		552,874		$ 442,727
Current Liabilities	223,321		223,321		207,551
Joint Venture [Member] | Equity Method Investment, Nonconsolidated Investee or Group of Investees [Member]
Related Party Transaction [Line Items]
Revenue	50,259	53,852	102,889	99,234
Gross Margin	15,977	17,776	28,003	34,609
Earnings Before Income Taxes	14,312	$ 16,519	24,508	$ 32,459
Current Assets	84,701		84,701		69,492
Noncurrent Assets	114,764		114,764		112,926
Current Liabilities	$ 23,152		$ 23,152		$ 18,276