Leases - Schedule of Components of Lease Expense (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020
Leases [Abstract]
Amortization of leased assets	$ 156	$ 162	$ 470	$ 485
Interest of lease liabilities	9	19	35	67
Operating lease cost	1,883	1,960	5,695	5,879
Total lease cost before subleases	2,048	2,141	6,200	6,431
Sublease income	(1,344)	(1,344)	(4,033)	(4,108)
Total lease cost, net	$ 704	$ 797	$ 2,167	$ 2,323