Other-Than-Temporary Impairment Analysis	3 Months Ended
Other-Than-Temporary Impairment Analysis	Mar. 31, 2013
Other than Temporary Impairment Losses, Investments [Abstract]
Other than Temporary Impairment Analysis [Text Block]	Other-Than-Temporary Impairment Analysis The FHLBank evaluates its individual available-for-sale and held-to-maturity investment securities holdings in an unrealized loss position for other-than-temporary impairment on a quarterly basis. As part of its securities' evaluation for other-than-temporary impairment, the FHLBank considers its intent to sell each debt security and whether it is more likely than not that the FHLBank will be required to sell the security before its anticipated recovery. If either of these conditions is met, the FHLBank recognizes an other-than-temporary impairment in earnings equal to the entire difference between the security's amortized cost basis and its fair value at the balance sheet date. For securities in unrealized loss positions that meet neither of these conditions, the FHLBank performs analyses to determine if any of these securities are other-than-temporarily impaired. For its other U.S. obligations and government-sponsored enterprise investments (mortgage-backed securities and non-mortgage-backed securities), the FHLBank determined that the strength of the issuers' guarantees through direct obligations or support from the U.S. government is sufficient to protect the FHLBank from losses based on current expectations. As a result, the FHLBank determined that, as of March 31, 2013, all of the gross unrealized losses on these investments were temporary as the declines in market value of these securities were not attributable to credit quality. Furthermore, the FHLBank does not intend to sell the investments, and it is not more likely than not that the FHLBank will be required to sell the investments before recovery of their amortized cost bases. As a result, the FHLBank did not consider any of these investments to be other-than-temporarily impaired at March 31, 2013. The FHLBank did not consider any of its investments to be other-than-temporarily impaired at December 31, 2012.

This item represents the entire disclosure related to the amount of other than temporary impairment (OTTI) related to credit losses recognized in earnings including: (a) the beginning balance of the amount related to credit losses on debt securities held by the investor at the beginning of the period for which a portion of an OTTI was recognized in other comprehensive income; (b) additions for the amount related to the credit loss for which an OTTI was not previously recognized; (c) reductions for securities sold during the period (realized); (d) reductions for securities for which the amount previously recognized in other comprehensive income was recognized in earnings because the investor intends to sell the security or more likely than not will be required to sell the security before recovery of its amortized cost basis; (e) additional increases to the amount related to the credit loss for which an OTTI was previously recognized when the investor does not intend to sell the security and it is not more likely than not that the investor will be required to sell the security before recovery of its amortized cost basis; (f) reductions for increases in cash flows expected to be collected that are recognized over the remaining life of the security; and (g) the ending balance of the amount related to credit losses on debt securities held by the entity at the end of the period for which a portion of an OTTI was recognized in other comprehensive income.

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