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)