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Loans and Allowance for Loan Losses - Troubled Debt Restructuring Modifications (Details) $ in Thousands | 3 Months Ended | 9 Months Ended
--- | --- | ---
Sep. 30, 2015 USD ($) contract | Sep. 30, 2014 USD ($) contract | Sep. 30, 2015 USD ($) loans contract | Sep. 30, 2014 USD ($) loans contract
Financing Receivable, Modifications [Line Items] |  |  |  |
Number of Contracts Modified | contract | 1 | 5 | 6 | 17
Pre-Modification Outstanding Recorded Investment | $ 700 | $ 5,628 | $ 1,704 | $ 6,882
Post-Modification Outstanding Recorded Investment | 700 | 5,700 | 1,803 | 6,992
Post-Modification Outstanding Recorded Investment at period end | $ 700 | $ 5,690 | $ 1,680 | 6,943
Pre-modification contract amount that subsequently paid off |  |  |  | 905
Post-modification contract amount that subsequently paid off |  |  |  | $ 905
Number of modified TDR loans that defaulted | loans |  |  | 0 | 0
Commercial loans | Commercial and industrial |  |  |  |
Financing Receivable, Modifications [Line Items] |  |  |  |
Number of Contracts Modified | contract | 1 | 2 | 5 | 7
Pre-Modification Outstanding Recorded Investment | $ 700 | $ 513 | $ 1,482 | $ 1,336
Post-Modification Outstanding Recorded Investment | 700 | 596 | 1,582 | 1,460
Post-Modification Outstanding Recorded Investment at period end | $ 700 | $ 596 | $ 1,463 | $ 1,431
Commercial loans | Commercial real estate, owner-occupied |  |  |  |
Financing Receivable, Modifications [Line Items] |  |  |  |
Number of Contracts Modified | contract |  |  |  | 1
Pre-Modification Outstanding Recorded Investment |  |  |  | $ 4,226
Post-Modification Outstanding Recorded Investment |  |  |  | 4,216
Post-Modification Outstanding Recorded Investment at period end |  |  |  | $ 4,206
Commercial real estate loans | Commercial real estate, owner-occupied |  |  |  |
Financing Receivable, Modifications [Line Items] |  |  |  |
Number of Contracts Modified | contract |  | 1 |  |
Pre-Modification Outstanding Recorded Investment |  | $ 4,226 |  |
Post-Modification Outstanding Recorded Investment |  | 4,216 |  |
Post-Modification Outstanding Recorded Investment at period end |  | $ 4,206 |  |
Commercial real estate loans | Commercial real estate, investor |  |  |  |
Financing Receivable, Modifications [Line Items] |  |  |  |
Number of Contracts Modified | contract |  | 1 | 1 |
Pre-Modification Outstanding Recorded Investment |  | $ 74 | $ 222 |
Post-Modification Outstanding Recorded Investment |  | 74 | 221 |
Post-Modification Outstanding Recorded Investment at period end |  | $ 74 | $ 217 |
Commercial real estate loans | Construction |  |  |  |
Financing Receivable, Modifications [Line Items] |  |  |  |
Number of Contracts Modified | contract |  | 1 |  |
Pre-Modification Outstanding Recorded Investment |  | $ 815 |  |
Post-Modification Outstanding Recorded Investment |  | 814 |  |
Post-Modification Outstanding Recorded Investment at period end |  | $ 814 |  |
Residential loans | Other residential |  |  |  |
Financing Receivable, Modifications [Line Items] |  |  |  |
Number of Contracts Modified | contract |  |  |  | 1
Pre-Modification Outstanding Recorded Investment |  |  |  | $ 815
Post-Modification Outstanding Recorded Investment |  |  |  | 814
Post-Modification Outstanding Recorded Investment at period end |  |  |  | $ 814
Residential loans | Home equity |  |  |  |
Financing Receivable, Modifications [Line Items] |  |  |  |
Number of Contracts Modified | contract |  |  |  | 2
Pre-Modification Outstanding Recorded Investment |  |  |  | $ 224
Post-Modification Outstanding Recorded Investment |  |  |  | 224
Post-Modification Outstanding Recorded Investment at period end |  |  |  | $ 222
Consumer loans | Installment and other consumer |  |  |  |
Financing Receivable, Modifications [Line Items] |  |  |  |
Number of Contracts Modified | contract |  |  |  | 6
Pre-Modification Outstanding Recorded Investment |  |  |  | $ 281
Post-Modification Outstanding Recorded Investment |  |  |  | 278
Post-Modification Outstanding Recorded Investment at period end |  |  |  | $ 270

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