Leases - Summary of Components of Lease Expenses (Details) - USD ($)	12 Months Ended
	Mar. 31, 2021	Mar. 31, 2020
Leases [Abstract]
Operating lease expense	$ 15,591,000	$ 14,992,000
Finance lease expense	77,000	0
Short-term lease expense	174,000	323,000
Variable lease expense	328,000	124,000
Total lease expenses	$ 16,170,000	$ 15,439,000