Organization and Basis of Presentation (Tables)

12 Months Ended

Dec. 31, 2020

Organization, Consolidation and Presentation of Financial Statements [Abstract]

Schedule of commercial office properties

As of December 31, 2020, we owned the following interests in properties in the New York metropolitan area, primarily in midtown Manhattan. Our investments located outside of Manhattan are referred to as the Suburban properties:

			Consolidated		Unconsolidated		Total
Location	Property Type		Number of Properties	Approximate Square Feet (unaudited)	Number of Properties	Approximate Square Feet (unaudited)	Number of Properties	Approximate Square Feet (unaudited)	Weighted Average Occupancy(1) (unaudited)
Commercial:
Manhattan	Office		18	10,681,045	11	11,841,483	29	22,522,528	92.4	%
	Retail		4	44,189	9	301,996	13	346,185	94.2	%
	Development/Redevelopment	(1)	8	1,095,418	3	2,927,782	11	4,023,200	N/A
			30	11,820,652	23	15,071,261	53	26,891,913	92.5	%
Suburban	Office		7	862,800	—	—	7	862,800	83.3	%
Total commercial properties			37	12,683,452	23	15,071,261	60	27,754,713	92.1	%
Residential:
Manhattan	Residential		1	82,250	8	1,663,774	9	1,746,024	75.7	%
Total portfolio			38	12,765,702	31	16,735,035	69	29,500,737	91.2	%

(1)The weighted average occupancy for commercial properties represents the total occupied square footage divided by the total square footage at acquisition.  The weighted average occupancy for residential properties represents the total occupied units divided by the total available units.