Leases - Summary of Lease Cost (Detail) - USD ($) $ in Thousands	12 Months Ended
	Mar. 31, 2021	Mar. 31, 2020
Lease cost:
Operating lease cost	$ 65,732	$ 60,861
Finance lease cost:
Depreciation of assets obtained under finance leases	13,656	11,328
Interest on lease liabilities	3,314	2,144
Short-term lease cost	5,618	4,750
Variable lease cost	7,176	8,608
Net lease cost	$ 95,496	$ 87,691