Basis of Presentation and Recently Issued Accounting Pronouncements (Details) - USD ($) $ in Thousands		3 Months Ended	9 Months Ended
	Jan. 01, 2019	Sep. 30, 2019	Sep. 30, 2019	Dec. 31, 2018
Recently Issued Accounting Pronouncements
Lease liability		$ 72,160	$ 72,160
Right-of-use assets obtained in exchange for lease obligations		1,929	60,642
Deferred rent		$ 215,379	$ 215,379	$ 156,212
Accounting Standards Update 2016-02: Leases | Restatement
Recently Issued Accounting Pronouncements
Lease liability	$ 79,300
Right-of-use assets obtained in exchange for lease obligations	58,600
Deferred rent	$ (20,700)