Summarized Financial Information for Joint Venture Unconsolidated (Detail) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2023	Dec. 31, 2022	Mar. 31, 2023
Related Party Transaction [Line Items]
Revenue	$ 558,833	$ 511,487	$ 1,782,590	$ 1,677,942
Gross Margin	180,628	158,770	565,641	503,875
Earnings Before Income Taxes	166,603	150,928	516,241	465,631
Current Assets	587,731		587,731		$ 521,503
Current Liabilities	225,513		225,513		212,889
Joint Venture [Member] | Equity Method Investment, Nonconsolidated Investee or Group of Investees [Member]
Related Party Transaction [Line Items]
Revenue	53,366	55,240	165,426	158,129
Gross Margin	19,465	24,716	51,512	52,718
Earnings Before Income Taxes	18,711	$ 22,754	45,925	$ 47,262
Current Assets	104,158		104,158		88,562
Noncurrent Assets	150,950		150,950		124,503
Current Liabilities	$ 40,621		$ 40,621		$ 29,434