Leases - Schedule of Components of Lease 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 cost	[1]	$ 13,314	$ 9,233	$ 42,436	$ 21,453
Sublease income		(284)	(664)	(1,969)	(1,790)
Net operating lease cost		$ 13,030	$ 8,569	$ 40,467	$ 19,663

[1] For the three and nine months ended September 30, 2020, variable lease costs were $2.9 million and $8.4 million, respectively. For the three and nine months ended September 30, 2019, variable lease costs were $1.3 million and $3.3 million, respectively. Variable lease costs primarily include common area maintenance charges.