Operating Leases - Components of Lease Costs (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Leases [Abstract]
Operating lease costs	$ 3,264	$ 3,578	$ 3,821
Short-term lease costs	1,949	1,763	2,042
Variable lease costs	853	842	845
Lease costs	$ 6,066	$ 6,183	$ 6,708