Leases - Lease Costs (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020
Leases [Abstract]
Operating Lease Cost	$ 1,109	$ 1,622	$ 3,873	$ 5,472
Amortization of Lease Assets	48	41	146	128
Interest on Lease Liabilities	8	9	27	30
Finance Lease Cost	56	50	173	158
Sublease Income	(34)	(113)	(95)	(338)
Total Net Lease Cost	$ 1,131	$ 1,559	$ 3,951	$ 5,292