Deferred Costs, Acquired Lease Intangibles and Goodwill - Schedule of Deferred Costs, Net (Details) - USD ($) $ in Thousands	Mar. 31, 2016	Dec. 31, 2015
Finite-Lived Intangible Assets [Line Items]
Leasing costs	$ 127,886	$ 121,864
Total deferred costs, gross amount	491,061	489,446
Total deferred costs, accumulated amortization	(190,502)	(178,767)
Total deferred costs, net, excluding net deferred financing costs	300,559	310,679
Acquired in-place lease value and deferred leasing costs
Finite-Lived Intangible Assets [Line Items]
Acquired finite-lived intangible assets	283,557	285,902
Acquired above-market leases
Finite-Lived Intangible Assets [Line Items]
Acquired finite-lived intangible assets	$ 79,618	$ 81,680