Leases (Schedule of Components of Lease Expense) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019
Finance lease
Amortization of right-of-use asset	$ 1,056	$ 997
Interest on lease liabilities	1,475	1,563
Operating lease
Fixed lease cost	5,448	5,063
Variable lease cost	314	35
Short-term lease cost	996	1,283
Total lease expense	$ 9,289	$ 8,941