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Loans and Allowance for Loan Losses (Details Textual) (USD $)
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9 Months Ended | |
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Sep. 30, 2012
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Dec. 31, 2011
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| Loans and Allowance for Loan Losses (Additional Textual) [Abstract] | ||
| Due days of accrual of interest on all loans | 90 days | |
| Originate loans with a loan-to-value | 80.00% | |
| Unallocated reserves for loan losses | $ 49,000,000 | $ 0 |
| Post-modification outstanding recorded investment | 7,500,000 | 0 |
| Loans sold with recourse | 1,500,000 | 1,500,000 |
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Residential mortgage [Member]
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| Loans and Allowance for Loan Losses (Textual) [Abstract] | ||
| Loans previously sold and serviced | 71,900,000 | 28,300,000 |
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Indirect auto loans [Member]
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| Loans and Allowance for Loan Losses (Textual) [Abstract] | ||
| Loans previously sold and serviced | $ 88,900,000 | $ 28,300,000 |