Statement of Member's Deficiency (USD $)	12 Months Ended
	Dec. 31, 2011	Dec. 31, 2010	Dec. 31, 2009
Distribution Made to Member or Limited Partner [Line Items]
Members' Deficiency Beginning Balance		$ (4,821,116)	$ (4,871,646)
Share of Net Income for Year	3,461,340	4,666,313
Distributions	(3,282,704)	(4,615,783)
Members' Deficiency Ending Balance	(4,642,480)	(4,821,116)
Anthony E. Malkin Joint Venture #1
Distribution Made to Member or Limited Partner [Line Items]
Members' Deficiency Beginning Balance		(482,112)	(487,165)
Share of Net Income for Year	346,134	466,631
Distributions	(328,271)	(461,578)
Members' Deficiency Ending Balance	(464,249)	(482,112)
Anthony E. Malkin Joint Venture #2
Distribution Made to Member or Limited Partner [Line Items]
Members' Deficiency Beginning Balance		(482,112)	(487,165)
Share of Net Income for Year	346,134	466,631
Distributions	(328,271)	(461,578)
Members' Deficiency Ending Balance	(464,249)	(482,112)
Anthony E. Malkin Joint Venture #3
Distribution Made to Member or Limited Partner [Line Items]
Members' Deficiency Beginning Balance		(482,110)	(487,163)
Share of Net Income for Year	346,134	466,631
Distributions	(328,271)	(461,578)
Members' Deficiency Ending Balance	(464,247)	(482,110)
Anthony E. Malkin Joint Venture #4
Distribution Made to Member or Limited Partner [Line Items]
Members' Deficiency Beginning Balance		(482,111)	(487,164)
Share of Net Income for Year	346,134	466,631
Distributions	(328,271)	(461,578)
Members' Deficiency Ending Balance	(464,248)	(482,111)
Peter L. Malkin Joint Venture #1
Distribution Made to Member or Limited Partner [Line Items]
Members' Deficiency Beginning Balance		(482,110)	(487,163)
Share of Net Income for Year	346,134	466,631
Distributions	(328,270)	(461,578)
Members' Deficiency Ending Balance	(464,246)	(482,110)
Peter L. Malkin Joint Venture #2
Distribution Made to Member or Limited Partner [Line Items]
Members' Deficiency Beginning Balance		(482,110)	(487,163)
Share of Net Income for Year	346,134	466,631
Distributions	(328,270)	(461,578)
Members' Deficiency Ending Balance	(464,246)	(482,110)
Peter L. Malkin Joint Venture #3
Distribution Made to Member or Limited Partner [Line Items]
Members' Deficiency Beginning Balance		(482,112)	(487,165)
Share of Net Income for Year	346,134	466,631
Distributions	(328,270)	(461,578)
Members' Deficiency Ending Balance	(464,248)	(482,112)
Peter L. Malkin Joint Venture #4
Distribution Made to Member or Limited Partner [Line Items]
Members' Deficiency Beginning Balance		(482,113)	(487,166)
Share of Net Income for Year	346,134	466,632
Distributions	(328,270)	(461,579)
Members' Deficiency Ending Balance	(464,249)	(482,113)
Peter L. Malkin Joint Venture #5
Distribution Made to Member or Limited Partner [Line Items]
Members' Deficiency Beginning Balance		(482,112)	(487,165)
Share of Net Income for Year	346,134	466,632
Distributions	(328,270)	(461,579)
Members' Deficiency Ending Balance	(464,248)	(482,112)
Peter L. Malkin Joint Venture #6
Distribution Made to Member or Limited Partner [Line Items]
Members' Deficiency Beginning Balance		(482,114)	(487,167)
Share of Net Income for Year	346,134	466,632
Distributions	(328,270)	(461,579)
Members' Deficiency Ending Balance	$ (464,250)	$ (482,114)