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Leases - Components of Lease Expense (Details) - USD ($)
$ in Thousands
12 Months Ended
Mar. 31, 2021
Mar. 31, 2020
Operating Leases:    
Operating lease cost $ 27,888 $ 28,855
Variable lease cost 7,781 8,238
Short term lease cost 6,675 7,553
Finance Leases:    
Depreciation 221 461
Interest expense 33 37
Total $ 42,598 $ 45,144