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Leases - Components of Lease Expense (Details) - USD ($)
$ in Thousands
3 Months Ended 12 Months Ended
Mar. 31, 2019
Mar. 31, 2021
Mar. 31, 2020
Leases [Abstract]      
Operating lease cost $ 1,195 $ 4,756 $ 2,950
Gain from extinguishment of lease liabilities (1,866) 0 (7,733)
Acceleration of rent expense 16,106 0 0
Finance lease cost      
Amortization of leased assets 254 970 996
Interest on lease liabilities 50 137 179
Total lease cost (gain) $ 15,739 $ 5,863 $ (3,608)