Leases - Components of Operating 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	$ 1,995	$ 2,120	$ 3,972	$ 4,166
Less: Sublease income	(39)	(38)	(78)	(76)
Net lease cost	$ 1,956	$ 2,082	$ 3,894	$ 4,090