Deferred Costs, Acquired Lease Intangibles and Goodwill - Schedule of Deferred Costs, Net (Details) - USD ($) $ in Thousands	Dec. 31, 2018	Dec. 31, 2017
Deferred Costs [Line Items]
Leasing costs	$ 178,120	$ 164,751
Total deferred costs, gross amount	444,806	469,530
Less: accumulated amortization	(209,839)	(215,102)
Total deferred costs, net, excluding net deferred financing costs	234,967	254,428
Acquired in-place lease value and deferred leasing costs
Deferred Costs [Line Items]
Acquired finite-lived intangible assets, gross	214,550	237,364
Acquired above-market leases
Deferred Costs [Line Items]
Acquired finite-lived intangible assets, gross	$ 52,136	$ 67,415