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Leases - Schedule of Operating Lease Costs (Detail) - USD ($)
$ in Thousands
12 Months Ended
Mar. 31, 2021
Mar. 31, 2020
Lease, Cost [Abstract]    
Operating lease cost $ 11,931 $ 11,515
Short-term lease cost 237 872
Variable lease cost 704 379
Total operating lease cost $ 12,872 $ 12,766