Organization and Basis of Presentation (Tables)

12 Months Ended

Dec. 31, 2013

Organization, Consolidation and Presentation of Financial Statements [Abstract]

Schedule of commercial office properties

As of December 31, 2013, we owned the following interests in commercial office buildings in the New York Metropolitan area, primarily in midtown Manhattan, a borough of New York City. Our investments in the New York Metropolitan area also include investments in Brooklyn, Long Island, Westchester County, Connecticut and Northern New Jersey, which are collectively known as the Suburban properties:

Location	Ownership	Number of Buildings	Square Feet (unaudited)	Weighted Average Occupancy(1) (unaudited)
Manhattan	Consolidated properties	23	17,306,045	94.5	%
	Unconsolidated properties	9	5,934,434	96.6	%
Suburban	Consolidated properties	26	4,087,400	79.8	%
	Unconsolidated properties	4	1,222,100	87.2	%
		62	28,549,979	92.5	%

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(1) The weighted average occupancy represents the total leased square feet divided by total available rentable square feet.