Leases - Lease Cost (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019
Leases [Abstract]
Amortization of right-of-use assets	$ 1,629	$ 2,625	$ 6,422	$ 7,602
Interest on lease liabilities	345	665	1,403	2,015
Operating lease cost	6,841	5,167	18,511	15,431
Variable lease cost	637	746	2,208	2,353
Sublease (income)	(48)	0	(64)	0
Total lease cost, net	9,404	$ 9,203	28,480	$ 27,401
Operating lease, residual value of leased asset	$ 8,000		$ 8,000