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