Summary of Significant Accounting Policies - Lease Accounting (Details) - USD ($) $ in Thousands	Jan. 01, 2019	Dec. 31, 2019	Dec. 31, 2018
Summary Of Significant Accounting Policies [Line Items]
Remaining future rental payments aggregate		$ 882,698
Operating Lease, Liability		693,539
Operating Lease, Right-of-Use Asset	$ 683,900	628,681
Notes And Accounts Receivable
Summary Of Significant Accounting Policies [Line Items]
Rent receivable, net of allowance		$ 171,900	$ 185,700
ASU 2016-02
Summary Of Significant Accounting Policies [Line Items]
Lease, Practical Expedients, Package [true false]	true
Lease, Practical Expedient, Land Easement [true false]	true
Lease, Practical Expedient, Lessor Single Lease Component [true false]	true
Accumulated dividends in excess of earnings	$ 6,300
Operating Lease, Liability	757,200
Amount reclassified from deferred rent liabilities to operatin glease liabilities under ASC 842	$ 73,300