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Allowance for Loan Losses and Credit Quality of Loans, Troubled Debt Restructurings (Details) $ in Thousands | 3 Months Ended | 9 Months Ended
--- | --- | ---
Sep. 30, 2015 USD ($) Contract | Sep. 30, 2014 USD ($) Contract | Sep. 30, 2015 USD ($) Contract | Sep. 30, 2014 USD ($) Contract
Financing Receivable, Modifications [Line Items] |  |  |  |
Period of sustained repayment performance for nonperforming TDRs to be returned to performing status |  |  | 6 months |
Number of contracts | Contract | 28 | 11 | 77 | 70
Pre-modification outstanding recorded investment | $ 2,156 | $ 429 | $ 7,857 | $ 5,783
Post-modification outstanding recorded investment | $ 1,993 | $ 348 | $ 6,230 | $ 4,540
Number of TDR loans with subsequent default | Contract | 2 | 2 | 6 | 7
Outstanding recorded investment on TDR loans with subsequent default | $ 174 | $ 73 | $ 518 | $ 515
Commercial Loans [Member] |  |  |  |
Financing Receivable, Modifications [Line Items] |  |  |  |
Number of contracts | Contract |  |  | 2 |
Pre-modification outstanding recorded investment |  |  | $ 1,470 |
Post-modification outstanding recorded investment |  |  | $ 359 |
Commercial Loans [Member] | Commercial [Member] |  |  |  |
Financing Receivable, Modifications [Line Items] |  |  |  |
Number of contracts | Contract |  |  | 1 |
Pre-modification outstanding recorded investment |  |  | $ 1,250 |
Post-modification outstanding recorded investment |  |  | $ 186 |
Commercial Loans [Member] | Small Business [Member] |  |  |  |
Financing Receivable, Modifications [Line Items] |  |  |  |
Number of contracts | Contract |  |  | 1 | 2
Pre-modification outstanding recorded investment |  |  | $ 220 | $ 570
Post-modification outstanding recorded investment |  |  | $ 173 | $ 558
Consumer Loans [Member] |  |  |  |
Financing Receivable, Modifications [Line Items] |  |  |  |
Number of contracts | Contract |  | 8 | 43 | 49
Pre-modification outstanding recorded investment |  | $ 250 | $ 3,321 | $ 3,056
Post-modification outstanding recorded investment |  | $ 187 | $ 3,017 | $ 2,354
Number of TDR loans with subsequent default | Contract | 0 | 1 | 4 | 7
Outstanding recorded investment on TDR loans with subsequent default | $ 0 | $ 25 | $ 344 | $ 515
Consumer Loans [Member] | Indirect [Member] |  |  |  |
Financing Receivable, Modifications [Line Items] |  |  |  |
Number of contracts | Contract |  |  |  | 2
Pre-modification outstanding recorded investment |  |  |  | $ 69
Post-modification outstanding recorded investment |  |  |  | $ 38
Consumer Loans [Member] | Home Equity [Member] |  |  |  |
Financing Receivable, Modifications [Line Items] |  |  |  |
Number of contracts | Contract | 12 | 1 | 39 | 7
Pre-modification outstanding recorded investment | $ 863 | $ 25 | $ 3,212 | $ 286
Post-modification outstanding recorded investment | $ 802 | $ 24 | $ 2,915 | $ 273
Number of TDR loans with subsequent default | Contract | 0 | 1 | 4 | 7
Outstanding recorded investment on TDR loans with subsequent default | $ 0 | $ 25 | $ 344 | $ 515
Consumer Loans [Member] | Direct [Member] |  |  |  |
Financing Receivable, Modifications [Line Items] |  |  |  |
Number of contracts | Contract |  | 7 | 4 | 40
Pre-modification outstanding recorded investment |  | $ 225 | $ 109 | $ 2,701
Post-modification outstanding recorded investment |  | $ 163 | $ 102 | $ 2,043
Residential Real Estate Mortgages [Member] |  |  |  |
Financing Receivable, Modifications [Line Items] |  |  |  |
Number of contracts | Contract | 16 | 3 | 32 | 19
Pre-modification outstanding recorded investment | $ 1,293 | $ 179 | $ 3,066 | $ 2,157
Post-modification outstanding recorded investment | $ 1,191 | $ 161 | $ 2,854 | $ 1,628
Number of TDR loans with subsequent default | Contract | 2 | 1 | 2 | 0
Outstanding recorded investment on TDR loans with subsequent default | $ 174 | $ 48 | $ 174 | $ 0

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