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Significant Accounting Policies and Estimates	6 Months Ended
Significant Accounting Policies and Estimates	Jun. 30, 2011
Significant Accounting Policies and Estimates [Abstract]
Significant Accounting Policies and Estimates	Note 1. Significant Accounting Policies and Estimates. Significant Accounting Policies and Estimates The FHLBNY has identified certain accounting policies that it believes are significant because they require management to make subjective judgments about matters that are inherently uncertain and because of the likelihood that materially different amounts would be reported under different conditions or by using different assumptions. These policies include estimating the allowance for credit losses on the advance and mortgage loan portfolios, evaluating the impairment of the Bank’s securities portfolios, estimating the liabilities for employee benefit programs, and estimating fair values of certain assets and liabilities. See Note 1 — Significant Accounting Policies and Estimates in Notes to the Financial Statements of the Federal Home Loan Bank of New York filed on Form 10-K on March 25, 2011, which contains a summary of the Bank’s significant accounting policies and estimates.