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Investment Securities (Details Textual) | Sep. 30, 2012 Security | Dec. 31, 2011 Security
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Investment Securities (Textual) [Abstract] |  |
Number of securities having unrealized holding losses with aggregate depreciation | 4 | 9
Unrealized holding losses depreciation | 5.00% | 6.30%

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- Definition Number of securities having unrealized holding losses with aggregate depreciation. + References No definition available. + Details
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- Definition Unrealized holding losses depreciation percentage from amortized cost. + References No definition available. + Details
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