Leases - Lease Cost (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	$ 1,518	$ 1,613	$ 3,172	$ 3,227
Short-term lease cost	317	920	1,007	2,081
Interest on lease liabilities	118	169	244	275
Amortization of right-of-use assets	821	885	1,602	1,585
Total lease cost	$ 2,774	$ 3,587	$ 6,025	$ 7,168