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	$ 2,519	$ 3,665	$ 7,493	$ 8,693
Finance lease cost	87	121	280	334
Short-term lease cost	1,799	922	4,771	2,988
Total lease expense	$ 4,405	$ 4,708	$ 12,544	$ 12,015