Leases - Components of 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 expense	$ 4,149	$ 3,669	$ 8,384	$ 7,399
Finance lease expense:
Amortization of assets	2	209	213	418
Interest on lease liabilities		6	1	13
Short-term lease expense	246	122	491	216
Variable lease expense	1,161	738	2,290	1,449
Total lease expense	$ 5,558	$ 4,744	$ 11,379	$ 9,495