Supplemental Cash Flow Information (Detail) - USD ($) $ in Thousands	12 Months Ended
	Mar. 31, 2024	Mar. 31, 2023	Mar. 31, 2022
Cash Payments:
Interest	$ 43,663	$ 31,596	$ 21,298
Income Taxes	124,482	131,512	86,407
Operating Cash Flows Used for Operating Leases	9,286	8,314	8,141
Noncash Financing Activities:
Right-of-use Assets Obtained for Capitalized Operating Lease	6,465	1,711	2,598
Excise Tax on Share Repurchases	$ 3,432	$ 738	$ 0