Leases (Summary of Lease Costs) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020
Leases [Abstract]
Operating lease costs	$ 28,189	$ 31,785
Finance lease costs:
Amortization of leased assets	2,105	2,299
Interest on lease liabilities	2,346	2,617
Short term lease costs	206	240
Variable lease costs	854	1,487
Total net lease costs	$ 33,700	$ 38,428