Leases - 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]
Operating lease cost	$ 2,958	$ 2,736	$ 8,570	$ 7,708
Amortization of right-of-use assets	2	218	215	654
Interest on lease liabilities	0	7	2	28
Total finance lease	$ 2	$ 225	$ 217	$ 682