Leases - Supplemental Cash Flow Information (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Leases
Cash payments for operating lease liabilities	$ 1,420	$ 1,486	$ 1,664
Right-of-use assets obtained in exchange for operating lease obligations	$ 2,377	$ 314	$ 857