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Federal Funds Sold, Securities Purchased under Resale Agreements and Other Short-Term Investments (Tables)
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12 Months Ended | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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Dec. 31, 2011
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| Federal Funds Sold, Securities Purchased under Resale Agreements and Other Short-Term Investments [Abstract] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Federal Funds Sold, Securities Purchased under Resale Agreements and Other Short-Term Investments |
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