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Loans and Allowance for Loan Losses (Additional Information) (Details) (USD $)
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12 Months Ended |
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Dec. 31, 2014
industry
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Dec. 31, 2013
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Dec. 31, 2012
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| Accounts, Notes, Loans and Financing Receivable [Line Items] |
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| Allowance for Loan and Lease Losses, Period Increase (Decrease) |
$ (474,000) |
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| Increase (Decrease) in Finance Receivables |
192,200,000 |
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| Number of Portfolio Concentration Industries |
2 |
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| Non-residential building operator loans expressed as a percentage of the total commercial real estate loans |
26.00% |
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| Lodging loans expressed as a percentage of the total commercial real estate loans |
27.00% |
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| Foregone interest |
842,000 |
990,000 |
1,100,000 |
| Residential real estate loans |
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| Accounts, Notes, Loans and Financing Receivable [Line Items] |
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| Financing Receivable in Process of Foreclosure |
4,900,000 |
4,400,000 |
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| Loans Receivable [Member] |
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| Accounts, Notes, Loans and Financing Receivable [Line Items] |
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| Loans restructured due to credit difficulties that are now performing |
4,500,000 |
5,500,000 |
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| Financing Receivables Impaired Troubled Debt Restructuring Non-Performing |
$ 1,500,000 |
$ 1,600,000 |
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| Consumer loans |
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| Accounts, Notes, Loans and Financing Receivable [Line Items] |
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| loans in foreclosure percentage of non-performing loans |
61.00% |
35.00% |
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