Deferred Costs, Acquired Lease Intangibles and Goodwill - Schedule of Deferred Costs, Net (Details) - USD ($) $ in Thousands	Dec. 31, 2020	Dec. 31, 2019
Deferred Costs [Line Items]
Leasing costs	$ 203,905	$ 199,033
Total deferred costs, gross amount	425,639	448,542
Less: accumulated amortization	(223,918)	(224,598)
Total deferred costs, net, excluding net deferred financing costs	201,721	223,944
Acquired in-place lease value and deferred leasing costs
Deferred Costs [Line Items]
Acquired finite-lived intangible assets, gross	181,336	200,296
Acquired above-market leases
Deferred Costs [Line Items]
Acquired finite-lived intangible assets, gross	$ 40,398	$ 49,213