Organization	3 Months Ended
Mar. 31, 2013
Accounting Policies [Abstract]
Organization	Note B Organization Registrant is a New York limited liability company which was organized as a joint venture on May 25, 1953. On September 30, 1953, Registrant acquired fee title to the building known as 250 West 57^th Street (the “Building”), formerly known as the Fisk Building, and the land thereunder located at 250-264 West 57th Street, New York, New York (collectively, the “Property”). On November 30, 2001, Registrant converted to a limited liability company under New York law and is now known as 250 West 57^th St. Associates L.L.C. The conversion did not change any aspect of the assets and operations of Registrant other than to protect its Participants from future liability to a third party. Registrant’s members (“Members”) are Peter L. Malkin and Anthony E. Malkin (collectively, the “Agents”), each of whom also acts as an agent for holders of participations (“Participations”) in their respective member interests in Registrant (the “Participants”). The Members in Registrant hold senior positions at Malkin Holdings LLC (“Malkin Holdings” or the “Supervisor”), One Grand Central Place, 60 East 42nd Street, New York, New York, which provides supervisory and other services to Registrant and Lessee. See Note E below.

Organization

3 Months Ended

Mar. 31, 2013

Note B Organization

Registrant is a New York limited liability company which was organized as a joint venture on May 25, 1953. On September 30, 1953, Registrant acquired fee title to the building known as 250 West 57^th Street (the “Building”), formerly known as the Fisk Building, and the land thereunder located at 250-264 West 57th Street, New York, New York (collectively, the “Property”). On November 30, 2001, Registrant converted to a limited liability company under New York law and is now known as 250 West 57^th St. Associates L.L.C. The conversion did not change any aspect of the assets and operations of Registrant other than to protect its Participants from future liability to a third party. Registrant’s members (“Members”) are Peter L. Malkin and Anthony E. Malkin (collectively, the “Agents”), each of whom also acts as an agent for holders of participations (“Participations”) in their respective member interests in Registrant (the “Participants”). The Members in Registrant hold senior positions at Malkin Holdings LLC (“Malkin Holdings” or the “Supervisor”), One Grand Central Place, 60 East 42nd Street, New York, New York, which provides supervisory and other services to Registrant and Lessee. See Note E below.