Leases - Components of Lease Expense (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	$ 1,263	$ 1,446	$ 2,515	$ 3,388
Amortization of lease expense	27	35	54	61
Interest on lease liabilities	3	4	6	7
Sublease income	(280)	(226)	(473)	(360)
Total lease cost, net	$ 1,013	$ 1,259	$ 2,102	$ 3,096