Interim Period Reporting	6 Months Ended
Interim Period Reporting	Jun. 30, 2011
Interim Period Reporting [Abstract]
Interim Period Reporting	Note A Interim Period Reporting In the opinion of management, the accompanying unaudited condensed financial statements of 250 West 57th St. Associates L.L.C. (“Registrant”) reflect all adjustments, consisting of normal recurring accruals, necessary to present fairly the financial position of Registrant as of June 30, 2011 and its results of operations for the three and six months ended June 30, 2011 and 2010 and cash flows for the six months ended June 30, 2011 and 2010. Information included in the condensed balance sheet as of December 31, 2010 has been derived from the audited balance sheet included in Registrant’s Form 10-K for the year ended December 31, 2010 (the “10-K”) previously filed with the Securities and Exchange Commission (the “SEC”). Pursuant to rules and regulations of the SEC, certain information and disclosures normally included in financial statements prepared in accordance with U.S. generally accepted accounting principles have been condensed or omitted from these financial statements unless significant changes have taken place since the end of the most recent fiscal year. Accordingly, these unaudited condensed financial statements should be read in conjunction with the financial statements, notes to financial statements and the other information in the 10-K. The results of operations for the three and six months ended June 30, 2011 are not necessarily indicative of the results to be expected for any interim period or the full year. Reclassification Certain prior year balances have been reclassified to conform with the current period presentation.

This element can be used to disclose the entire quarterly financial data disclosure in the annual financial statements as a single block of text. The disclosure includes a tabular presentation of financial information for each fiscal quarter for the current and previous year, including revenues, gross profit, income (loss) before extraordinary items and cumulative effect of a change in accounting principle and earnings per share data. It also includes an indication if the information in the note is unaudited, comments on the aggregate effect of year-end adjustments, and an explanation of matters or transactions that affect comparability or are pertinent to an understanding of the information furnished. Alternatively, the details of this disclosure can be reported using the elements in this group, or by using other taxonomy elements and applying the appropriate quarterly date and period contexts when creating an instance document. For example, the element for "Interest and Dividend Income, Operating" may be used by financial institutions from the Statement of Income, applying the appropriate quarterly date and period context when creating an instance document.

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