Leases - Summary of Rent Expense (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019
Leases [Abstract]
Operating lease costs	$ 9,605	$ 9,256	$ 28,375	$ 26,762
Short-term lease costs	276	552	1,149	1,555
Variable lease costs	1	(180)	2	4
Total rent expense	$ 9,882	$ 9,628	$ 29,526	$ 28,321