Leases - Lease Cost (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2021	Mar. 31, 2020
Leases [Abstract]
Amortization of right-of-use assets	$ 1,795	$ 2,654
Interest on lease liabilities	537	596
Operating lease cost	7,267	5,471
Variable lease cost	557	795
Short-term lease cost	309	0
Total lease cost	10,465	$ 9,516
Operating lease, residual value of leased asset	$ 8,700