Leases - Cash Payments Included in Measurement of Lease liabilities (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Finance leases
Operating cash flows included in operating activities	$ 219	$ 254	$ 307
Financing cash flows included in payments under finance lease obligations	1,434	1,715	1,964
Operating leases
Operating cash flows (fixed payments) included in other operating activities, net	4,781	4,988	5,092
Operating cash flows (liability reduction) included in other operating activities, net	$ 3,948	$ 3,856	$ 5,404