Segment Information - Summary of NOI by Segment (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2018	Mar. 31, 2017
Segment Information
Total revenues	$ 536,437	$ 508,058
Operating expenses	237,602	220,659
NOI - consolidated	298,835	287,399
Deduct: NOI attributable to noncontrolling interests in consolidated subsidiaries	(17,312)	(16,338)
Add: Our share of NOI from partially owned entities	67,513	66,097
NOI at share	349,036	337,158
Non-cash adjustments for straight-line rents, amortization of acquired below-market leases, net and other	(17,948)	(20,481)
NOI at share - cash basis	331,088	316,677
New York
Segment Information
Total revenues	448,484	426,239
Operating expenses	197,916	183,107
NOI - consolidated	250,568	243,132
Deduct: NOI attributable to noncontrolling interests in consolidated subsidiaries	(11,745)	(11,439)
Add: Our share of NOI from partially owned entities	49,773	45,462
NOI at share	288,596	277,155
Non-cash adjustments for straight-line rents, amortization of acquired below-market leases, net and other	(17,323)	(18,372)
NOI at share - cash basis	271,273	258,783
Other
Segment Information
Total revenues	87,953	81,819
Operating expenses	39,686	37,552
NOI - consolidated	48,267	44,267
Deduct: NOI attributable to noncontrolling interests in consolidated subsidiaries	(5,567)	(4,899)
Add: Our share of NOI from partially owned entities	17,740	20,635
NOI at share	60,440	60,003
Non-cash adjustments for straight-line rents, amortization of acquired below-market leases, net and other	(625)	(2,109)
NOI at share - cash basis	$ 59,815	$ 57,894