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Loans and Allowance for Loan Losses - Troubled Debt Restructuring by Class (Details) $ in Thousands | 3 Months Ended |
--- | --- | ---
Mar. 31, 2016 USD ($) loans | Mar. 31, 2015 USD ($) loans | Dec. 31, 2015 USD ($)
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |
Number of loans removed from TDR designation | loans | 0 | 1 |
Loans removed from TDR designation, recorded investment | $ 108 |  |
Recorded investment in Troubled Debt Restructurings | 19,724 |  | $ 19,081
TDR loans accruing interest as of period end | 19,700 |  | 19,000
TDR loans acquired | 621 |  | 137
Charge-off to allowance for loan losses | 9 | $ 8 |
Commercial loans | Commercial and industrial |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |
Recorded investment in Troubled Debt Restructurings | 3,825 |  | 4,698
Charge-off to allowance for loan losses | 9 | 2 |
Commercial real estate loans | Commercial real estate, owner-occupied |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |
Recorded investment in Troubled Debt Restructurings | 6,993 |  | 6,993
Charge-off to allowance for loan losses | 0 | 0 |
Commercial real estate loans | Commercial real estate, investor |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |
Recorded investment in Troubled Debt Restructurings | 2,052 |  | 514
Charge-off to allowance for loan losses | 0 | 0 |
Commercial real estate loans | Construction |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |
Recorded investment in Troubled Debt Restructurings | 3,238 |  | 3,238
Charge-off to allowance for loan losses | 0 | 0 |
Residential loans | Home equity |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |
Recorded investment in Troubled Debt Restructurings | 458 |  | 460
Charge-off to allowance for loan losses | 0 | 0 |
Residential loans | Other residential |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |
Recorded investment in Troubled Debt Restructurings | 1,997 |  | 2,010
Charge-off to allowance for loan losses | 0 | 0 |
Consumer loans | Installment and other consumer |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |
Recorded investment in Troubled Debt Restructurings | 1,161 |  | $ 1,168
Charge-off to allowance for loan losses | $ 0 | $ 6 |

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