Leases (Components of Lease Expense) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019
Leases [Abstract]
Operating lease cost	$ 2,103	$ 2,251
Amortization of leased assets	164	570
Interest on lease liabilities	19	18
Variable lease expense	588	555
Short-term lease expense	260	298
Total lease expense	$ 3,134	$ 3,692