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Loans and Allowance for Loan Losses - Loans Outstanding and Aging Analysis (Details) - USD ($) $ in Thousands | Sep. 30, 2015 | Dec. 31, 2014
--- | --- | ---
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Loans past due | $ 3,653 | $ 10,359
Current | 1,359,547 | 1,352,992
Total loans | 1,363,200 | 1,363,351
Financing Receivable, Recorded Investment, Nonaccrual Status | 2,638 | 9,350
Purchased Credit Impaired (PCI) loans no longer accreting interest | 2 | 1,400
Purchased Credit-impaired (PCI) loans accreting interest | 3,700 | 3,800
Deferred loan fees | 861 | 487
Unaccreted purchase discounts on non-PCI loans | 3,400 | 4,400
30-59 days past due |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Loans past due | 3,209 | 1,009
60-89 days past due |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Loans past due | 251 |
90 days or more past due |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Loans past due | 193 |
Commercial loans | Commercial and industrial |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Loans past due | 1,951 | 183
Current | 188,016 | 210,040
Total loans | 189,967 | 210,223
Financing Receivable, Recorded Investment, Nonaccrual Status | 354 | 0
Commercial loans | Commercial and industrial | 30-59 days past due |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Loans past due | 1,780 | 183
Commercial loans | Commercial and industrial | 60-89 days past due |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Loans past due | 150 |
Commercial loans | Commercial and industrial | 90 days or more past due |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Loans past due | 21 |
Commercial real estate loans | Commercial real estate, owner-occupied |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Loans past due | 139 | 1,403
Current | 239,196 | 229,202
Total loans | 239,335 | 230,605
Financing Receivable, Recorded Investment, Nonaccrual Status | 0 | 1,403
Commercial real estate loans | Commercial real estate, owner-occupied | 30-59 days past due |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Loans past due | 139 | 0
Commercial real estate loans | Commercial real estate, owner-occupied | 60-89 days past due |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Loans past due | 0 |
Commercial real estate loans | Commercial real estate, owner-occupied | 90 days or more past due |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Loans past due | 0 |
Commercial real estate loans | Commercial real estate, investor |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Loans past due | 421 | 2,429
Current | 671,256 | 671,070
Total loans | 671,677 | 673,499
Financing Receivable, Recorded Investment, Nonaccrual Status | 2,020 | 2,429
Commercial real estate loans | Commercial real estate, investor | 30-59 days past due |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Loans past due | 421 | 0
Commercial real estate loans | Commercial real estate, investor | 60-89 days past due |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Loans past due | 0 |
Commercial real estate loans | Commercial real estate, investor | 90 days or more past due |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Loans past due | 0 |
Commercial real estate loans | Construction |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Loans past due | 0 | 5,134
Current | 54,921 | 43,279
Total loans | 54,921 | 48,413
Financing Receivable, Recorded Investment, Nonaccrual Status | 2 | 5,134
Commercial real estate loans | Construction | 30-59 days past due |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Loans past due | 0 | 0
Commercial real estate loans | Construction | 60-89 days past due |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Loans past due | 0 |
Commercial real estate loans | Construction | 90 days or more past due |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Loans past due | 0 |
Residential loans | Home equity |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Loans past due | 1,061 | 926
Current | 112,670 | 109,862
Total loans | 113,731 | 110,788
Financing Receivable, Recorded Investment, Nonaccrual Status | 172 | 280
Residential loans | Home equity | 30-59 days past due |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Loans past due | 862 | 646
Residential loans | Home equity | 60-89 days past due |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Loans past due | 99 |
Residential loans | Home equity | 90 days or more past due |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Loans past due | 100 |
Residential loans | Other residential |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Loans past due | 0 | 0
Current | 71,682 | 73,035
Total loans | 71,682 | 73,035
Financing Receivable, Recorded Investment, Nonaccrual Status | 0 | 0
Residential loans | Other residential | 30-59 days past due |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Loans past due | 0 | 0
Residential loans | Other residential | 60-89 days past due |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Loans past due | 0 |
Residential loans | Other residential | 90 days or more past due |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Loans past due | 0 |
Consumer loans | Installment and other consumer |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Loans past due | 81 | 284
Current | 21,806 | 16,504
Total loans | 21,887 | 16,788
Financing Receivable, Recorded Investment, Nonaccrual Status | 90 | 104
Consumer loans | Installment and other consumer | 30-59 days past due |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Loans past due | 7 | $ 180
Consumer loans | Installment and other consumer | 60-89 days past due |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Loans past due | 2 |
Consumer loans | Installment and other consumer | 90 days or more past due |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Loans past due | $ 72 |

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