Leases - Lease Costs (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019
Operating lease cost:
Fixed lease cost	$ 5,333	$ 4,990
Variable lease cost	2,145	1,887
Total	7,478	6,877
Finance lease cost:
Amortization on finance lease asset	1,873	0
Interest on lease liability	333	0
Total	$ 2,206	$ 0