Segment Information - Summary of NOI by Segment (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2020	Jun. 30, 2019	Jun. 30, 2020	Jun. 30, 2019
Segment Information
Total revenues	$ 343,026	$ 463,103	$ 787,558	$ 997,771
Operating expenses	(174,425)	(220,752)	(404,432)	(467,647)
NOI - consolidated	168,601	242,351	383,126	530,124
Deduct: NOI attributable to noncontrolling interests in consolidated subsidiaries	(15,448)	(16,416)	(30,941)	(33,819)
Add: NOI from partially owned entities	69,487	82,974	151,368	150,376
NOI at share	222,640	308,909	503,553	646,681
Non-cash adjustments for straight-line rents, amortization of acquired below-market leases, net, and other	34,190	9,748	37,266	4,567
NOI at share - cash basis	256,830	318,657	540,819	651,248
New York
Segment Information
Total revenues	270,628	376,381	626,243	819,666
Operating expenses	(140,207)	(187,819)	(323,238)	(385,914)
NOI - consolidated	130,421	188,562	303,005	433,752
Deduct: NOI attributable to noncontrolling interests in consolidated subsidiaries	(8,504)	(10,030)	(16,937)	(21,437)
Add: NOI from partially owned entities	67,051	79,170	145,459	128,745
NOI at share	188,968	257,702	431,527	541,060
Non-cash adjustments for straight-line rents, amortization of acquired below-market leases, net, and other	32,943	8,437	34,049	1,819
NOI at share - cash basis	221,911	266,139	465,576	542,879
Other
Segment Information
Total revenues	72,398	86,722	161,315	178,105
Operating expenses	(34,218)	(32,933)	(81,194)	(81,733)
NOI - consolidated	38,180	53,789	80,121	96,372
Deduct: NOI attributable to noncontrolling interests in consolidated subsidiaries	(6,944)	(6,386)	(14,004)	(12,382)
Add: NOI from partially owned entities	2,436	3,804	5,909	21,631
NOI at share	33,672	51,207	72,026	105,621
Non-cash adjustments for straight-line rents, amortization of acquired below-market leases, net, and other	1,247	1,311	3,217	2,748
NOI at share - cash basis	$ 34,919	$ 52,518	$ 75,243	$ 108,369