Summary of Significant Accounting Policies - Accounting Pronouncements (Details) - USD ($) $ in Thousands	Jan. 01, 2019	Dec. 31, 2019
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Operating lease, right-of-use asset		$ 360,185
Operating lease, liability		465,907
Finance lease, right-of-use asset		2,508
Finance lease liabilities		$ 2,544
ASU 2016-02
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Operating lease, right-of-use asset	$ 438,700
Operating lease, liability	574,500
Finance lease, right-of-use asset	2,400
Finance lease liabilities	2,400
Deferred rent	50,000
Impairment loss	$ 85,800