Leases - Lease Cost and Supplemental Cash Flow Information Related to Leases (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2021	Jun. 30, 2020	Jun. 30, 2021	Jun. 30, 2020
Leases [Abstract]
Operating lease cost	$ 1,922	$ 2,006	$ 3,891	$ 4,061
Finance lease cost:
Amortization of ROU assets	78	78	161	160
Interest on lease liabilities	4	8	10	17
Total finance lease cost	$ 82	$ 86	$ 171	$ 177