Leases and Other - Components of Least Expenses (Details) - USD ($) $ in Thousands		3 Months Ended		9 Months Ended
		Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019
Finance lease cost:
Amortization of right-of-use assets		$ 926	$ 697	$ 2,767	$ 1,895
Interest on lease liabilities		429	130	1,258	379
Operating lease cost		6,596	6,625	20,235	19,456
Short-term lease cost		123	571	465	1,348
Variable lease cost		1,557	1,478	4,615	4,695
Sublease income	[1]		226
Total lease cost, net		$ 9,631	$ 9,727	$ 29,340	$ 27,773

[1]   Sublease income excludes rental income from owned assets, which is recorded in revenue.