Commitments and Contingencies - Lease Costs (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Commitments and Contingencies Disclosure [Abstract]
Amortization of right-of-use assets	$ 106	$ 152	$ 217
Interest on lease obligations	0	1	10
Finance lease costs	106	153	227
Operating lease cost	4,396	3,879	4,556
Short-term lease costs	70	47	0
Sublease income	0	(55)	(957)
Total lease cost	$ 4,572	$ 4,024	$ 3,826