Recently Issued Accounting Guidance	9 Months Ended
Sep. 30, 2013
Recently Issued Accounting Guidance [Abstract]
Description of New Accounting Pronouncements Not yet Adopted [Text Block]	Recently Issued Accounting Guidance Presentation of Comprehensive Income. On February 5, 2013, the Financial Accounting Standards Board ("FASB") issued Accounting Standards Update ("ASU") 2013-02 "Reporting of Amounts Reclassified Out of Accumulated Other Comprehensive Income" ("ASU 2013-02"), which requires an entity to report, either on the face of the statement where net income is presented or in the notes, the effect of significant reclassifications out of accumulated other comprehensive income on the respective line items in net income if the amount being reclassified is required under U.S. GAAP to be reclassified in its entirety to net income. For other amounts that are not required under U.S. GAAP to be reclassified in their entirety to net income in the same reporting period, an entity is required to cross-reference other disclosures required under U.S. GAAP that provide additional detail about those amounts. The guidance in ASU 2013-02 is effective prospectively for fiscal years, and interim periods within those years, beginning after December 15, 2012 (January 1, 2013 for the Bank). The adoption of this guidance did not have any impact on the Bank’s results of operations or financial condition. The required disclosures are presented in Note 18. Disclosures about Offsetting Assets and Liabilities. On December 16, 2011, the FASB issued ASU 2011-11 "Disclosures about Offsetting Assets and Liabilities," which, as clarified, requires enhanced disclosures about derivatives, repurchase agreements and reverse repurchase agreements, and securities borrowing and securities lending transactions that are either offset in the statement of financial position or subject to an enforceable master netting arrangement or similar agreement, irrespective of whether they are offset. This information is intended to enable users of an entity's financial statements to evaluate the effect or potential effect of netting arrangements on an entity's financial position, including the effect or potential effect of rights of setoff associated with these types of financial instruments. The eligibility criteria for offsetting are different in International Financial Reporting Standards ("IFRSs") and U.S. GAAP. For example, unlike IFRSs, U.S. GAAP provides entities the option to present net in their balance sheets derivatives that are subject to a legally enforceable netting arrangement with the same party where rights of setoff are only available in the event of default or bankruptcy. The new disclosure requirements allow investors to better compare financial statements prepared in accordance with IFRSs or U.S. GAAP and improve transparency in the reporting of how entities mitigate credit risk, including disclosure of related collateral pledged or received. The guidance is effective for annual reporting periods beginning on or after January 1, 2013, and interim periods within those annual periods (January 1, 2013 for the Bank), and is to be applied retrospectively to all periods presented. The adoption of this guidance did not have any impact on the Bank’s results of operations or financial condition. The required disclosures are presented in Note 10. Asset Classification and Charge-offs. On April 9, 2012, the Finance Agency issued Advisory Bulletin 2012-02, "Framework for Adversely Classifying Loans, Other Real Estate Owned, and Other Assets and Listing Assets for Special Mention" ("AB 2012-02"). The guidance establishes a standard and uniform methodology for classifying assets and prescribes the timing of asset charge-offs, excluding investment securities. The guidance in AB 2012-02 is generally consistent with the Uniform Retail Credit Classification and Account Management Policy issued by the federal banking regulators in June 2000. The adoption of the accounting guidance in AB 2012-02, which is effective January 1, 2015, is not expected to have a significant impact on the Bank's results of operations or financial condition. Joint and Several Liability Arrangements. On February 28, 2013, the FASB issued ASU 2013-04 “Obligations Resulting from Joint and Several Liability Arrangements for Which the Total Amount of the Obligation Is Fixed at the Reporting Date” (“ASU 2013-04”), which provides guidance for the recognition, measurement and disclosure of obligations resulting from joint and several liability arrangements for which the total amount of the obligation within the scope of the guidance is fixed at the reporting date. ASU 2013-04 requires an entity to measure these obligations as the sum of (1) the amount the reporting entity agreed to pay on the basis of its arrangement among its co-obligors and (2) any additional amount the reporting entity expects to pay on behalf of its co-obligors. ASU 2013-04 also requires an entity to disclose the nature and amount of the obligation as well as other information about those obligations. The guidance in ASU 2013-04 is effective for fiscal years, and interim periods within those years, beginning after December 15, 2013 (January 1, 2014 for the Bank) and is to be applied retrospectively to all prior periods presented. The adoption of this guidance will not have any impact on the Bank's results of operations or financial condition.

Recently Issued Accounting Guidance

Presentation of Comprehensive Income. On February 5, 2013, the Financial Accounting Standards Board ("FASB") issued Accounting Standards Update ("ASU") 2013-02 "Reporting of Amounts Reclassified Out of Accumulated Other Comprehensive Income" ("ASU 2013-02"), which requires an entity to report, either on the face of the statement where net income is presented or in the notes, the effect of significant reclassifications out of accumulated other comprehensive income on the respective line items in net income if the amount being reclassified is required under U.S. GAAP to be reclassified in its entirety to net income. For other amounts that are not required under U.S. GAAP to be reclassified in their entirety to net income in the same reporting period, an entity is required to cross-reference other disclosures required under U.S. GAAP that provide additional detail about those amounts. The guidance in ASU 2013-02 is effective prospectively for fiscal years, and interim periods within those years, beginning after December 15, 2012 (January 1, 2013 for the Bank). The adoption of this guidance did not have any impact on the Bank’s results of operations or financial condition. The required disclosures are presented in Note 18.

Disclosures about Offsetting Assets and Liabilities. On December 16, 2011, the FASB issued ASU 2011-11 "Disclosures about Offsetting Assets and Liabilities," which, as clarified, requires enhanced disclosures about derivatives, repurchase agreements and reverse repurchase agreements, and securities borrowing and securities lending transactions that are either offset in the statement of financial position or subject to an enforceable master netting arrangement or similar agreement, irrespective of whether they are offset. This information is intended to enable users of an entity's financial statements to evaluate the effect or potential effect of netting arrangements on an entity's financial position, including the effect or potential effect of rights of setoff associated with these types of financial instruments.

The eligibility criteria for offsetting are different in International Financial Reporting Standards ("IFRSs") and U.S. GAAP. For example, unlike IFRSs, U.S. GAAP provides entities the option to present net in their balance sheets derivatives that are subject to a legally enforceable netting arrangement with the same party where rights of setoff are only available in the event of default or bankruptcy. The new disclosure requirements allow investors to better compare financial statements prepared in accordance with IFRSs or U.S. GAAP and improve transparency in the reporting of how entities mitigate credit risk, including disclosure of related collateral pledged or received.

The guidance is effective for annual reporting periods beginning on or after January 1, 2013, and interim periods within those annual periods (January 1, 2013 for the Bank), and is to be applied retrospectively to all periods presented. The adoption of this guidance did not have any impact on the Bank’s results of operations or financial condition. The required disclosures are presented in Note 10.

Asset Classification and Charge-offs. On April 9, 2012, the Finance Agency issued Advisory Bulletin 2012-02, "Framework for Adversely Classifying Loans, Other Real Estate Owned, and Other Assets and Listing Assets for Special Mention" ("AB 2012-02"). The guidance establishes a standard and uniform methodology for classifying assets and prescribes the timing of asset charge-offs, excluding investment securities. The guidance in AB 2012-02 is generally consistent with the Uniform Retail Credit Classification and Account Management Policy issued by the federal banking regulators in June 2000. The adoption of the accounting guidance in AB 2012-02, which is effective January 1, 2015, is not expected to have a significant impact on the Bank's results of operations or financial condition.

Joint and Several Liability Arrangements. On February 28, 2013, the FASB issued ASU 2013-04 “Obligations Resulting from Joint and Several Liability Arrangements for Which the Total Amount of the Obligation Is Fixed at the Reporting Date” (“ASU 2013-04”), which provides guidance for the recognition, measurement and disclosure of obligations resulting from joint and several liability arrangements for which the total amount of the obligation within the scope of the guidance is fixed at the reporting date. ASU 2013-04 requires an entity to measure these obligations as the sum of (1) the amount the reporting entity agreed to pay on the basis of its arrangement among its co-obligors and (2) any additional amount the reporting entity expects to pay on behalf of its co-obligors. ASU 2013-04 also requires an entity to disclose the nature and amount of the obligation as well as other information about those obligations. The guidance in ASU 2013-04 is effective for fiscal years, and interim periods within those years, beginning after December 15, 2013 (January 1, 2014 for the Bank) and is to be applied retrospectively to all prior periods presented. The adoption of this guidance will not have any impact on the Bank's results of operations or financial condition.