Leases Components of Lease Expense (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019
Leases [Abstract]
Operating lease cost	$ 14,348	$ 14,622
Amortization of right-of-use asset	133	142
Interest on lease liabilities	17	22
Total finance lease cost	$ (150)	$ (164)