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Loans (Narrative) (Details) (USD $) | 3 Months Ended | 9 Months Ended | 12 Months Ended
--- | --- | --- | ---
Sep. 30, 2014 | Sep. 30, 2013 | Sep. 30, 2014 | Sep. 30, 2013 | Dec. 31, 2013
Financing Receivable, Recorded Investment [Line Items] |  |  |  |  |
Troubled Debt Restructuring, Classification removed | $ 900,000 | $ 728,000 | $ 2,500,000 | $ 3,600,000 |
Partial Charge-Offs On Impaired Loans |  |  | 44,574,000 |  | 63,272,000
Impaired Financing Receivable, Related Allowance | 4,120,000 |  | 4,120,000 |  | 10,451,000
Recorded investment, related to loans | 10,500,000 |  | 10,500,000 |  | 21,400,000
Troubled Debt Restructuring Included In Nonaccrual Loans | 46,800,000 |  | 46,800,000 |  | 76,300,000
TDRs included in accruing loan totals | 17,200,000 |  | 17,200,000 |  | 18,800,000
Nonaccrual Trouble Debt Restructuring Current | 14,500,000 |  | 14,500,000 |  | 50,600,000
Commitments to lend additional funds to borrowers whose terms had been modified in a TDR | 2,700,000 |  | 2,700,000 |  | 4,000,000
Specific reserves related to troubled debt restructuring | 2,500,000 |  | 2,500,000 |  | 7,500,000
Additional specific reserves related to troubled debt restructurings | 258,000 | 474,000 | 537,000 | 745,000 |
Modified substandard commercial loans, total recorded investment | 443,000 | 541,000 | 443,000 | 541,000 |
Modified substandard consumer loans, total recorded investment | 17,600,000 | 19,600,000 | 17,600,000 | 19,600,000 |
Loan Modifications on Nonacrrual status | 205,000 | 800,000 | 1,000,000 | 3,200,000 |
Loan past due period before entering default status |  |  | 30 days |  |
Financing Receivable, Modifications, Subsequent Default, Recorded Investment, During Period | 2,228,000 | 5,603,000 | 2,507,000 | 7,162,000 |
Financing Receivable With No Related Allowance Recorded [Member] |  |  |  |  |
Financing Receivable, Recorded Investment [Line Items] |  |  |  |  |
Partial Charge-Offs On Impaired Loans |  |  | 40,400,000 |  | 58,100,000
Financing Receivable With A Related Allowance Recorded [Member] |  |  |  |  |
Financing Receivable, Recorded Investment [Line Items] |  |  |  |  |
Partial Charge-Offs On Impaired Loans |  |  | 4,200,000 |  | 5,200,000
Commercial Real Estate [Member] |  |  |  |  |
Financing Receivable, Recorded Investment [Line Items] |  |  |  |  |
Financing Receivable, Modifications, Subsequent Default, Recorded Investment, During Period |  | 634,000 |  | 670,000 |
Commercial Real Estate [Member] | Financing Receivable With No Related Allowance Recorded [Member] |  |  |  |  |
Financing Receivable, Recorded Investment [Line Items] |  |  |  |  |
Impaired Financing Receivable, Related Allowance | 0 |  | 0 |  | 0
Commercial Real Estate [Member] | Financing Receivable With A Related Allowance Recorded [Member] |  |  |  |  |
Financing Receivable, Recorded Investment [Line Items] |  |  |  |  |
Impaired Financing Receivable, Related Allowance | 252,000 |  | 252,000 |  | 5,496,000
Accruing [Member] |  |  |  |  |
Financing Receivable, Recorded Investment [Line Items] |  |  |  |  |
Loans modified during period | 160,000 | 376,000 | 261,000 | 496,000 |
Nonaccrual [Member] |  |  |  |  |
Financing Receivable, Recorded Investment [Line Items] |  |  |  |  |
Loans modified during period | $ 2,100,000 | $ 5,200,000 | $ 2,200,000 | $ 6,700,000 |

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