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Loans and Allowance for Loan Losses - Credit Quality of Loans (Details) - USD ($) $ in Thousands | Sep. 30, 2016 | Dec. 31, 2015
--- | --- | ---
Financing Receivable, Recorded Investment [Line Items] |  |
Total loans | $ 1,467,663 | $ 1,451,228
Purchase credit-impaired |  |
Financing Receivable, Recorded Investment [Line Items] |  |
Purchase credit-impaired | 2,874 | 3,681
Pass |  |
Financing Receivable, Recorded Investment [Line Items] |  |
Total loans | 1,430,258 | 1,392,597
Pass | Purchase credit-impaired |  |
Financing Receivable, Recorded Investment [Line Items] |  |
Purchase credit-impaired | 2,874 | 3,260
Special Mention |  |
Financing Receivable, Recorded Investment [Line Items] |  |
Total loans | 14,813 | 36,300
Special Mention | Purchase credit-impaired |  |
Financing Receivable, Recorded Investment [Line Items] |  |
Purchase credit-impaired | 0 | 0
Substandard |  |
Financing Receivable, Recorded Investment [Line Items] |  |
Total loans | 22,592 | 22,331
Substandard | Purchase credit-impaired |  |
Financing Receivable, Recorded Investment [Line Items] |  |
Purchase credit-impaired | 0 | 421
Commercial loans | Commercial and industrial |  |
Financing Receivable, Recorded Investment [Line Items] |  |
Loans excluding purchased credit-impaired loans | 221,167 | 219,277
Total loans | 221,207 | 219,452
Commercial loans | Commercial and industrial | Purchase credit-impaired |  |
Financing Receivable, Recorded Investment [Line Items] |  |
Purchase credit-impaired | 40 | 175
Commercial loans | Commercial and industrial | Pass |  |
Financing Receivable, Recorded Investment [Line Items] |  |
Loans excluding purchased credit-impaired loans | 203,784 | 192,560
Commercial loans | Commercial and industrial | Special Mention |  |
Financing Receivable, Recorded Investment [Line Items] |  |
Loans excluding purchased credit-impaired loans | 8,859 | 22,457
Commercial loans | Commercial and industrial | Substandard |  |
Financing Receivable, Recorded Investment [Line Items] |  |
Loans excluding purchased credit-impaired loans | 8,524 | 4,260
Commercial real estate loans | Commercial real estate, owner-occupied |  |
Financing Receivable, Recorded Investment [Line Items] |  |
Loans excluding purchased credit-impaired loans | 236,485 | 240,598
Total loans | 237,538 | 242,309
Commercial real estate loans | Commercial real estate, owner-occupied | Purchase credit-impaired |  |
Financing Receivable, Recorded Investment [Line Items] |  |
Purchase credit-impaired | 1,053 | 1,711
Commercial real estate loans | Commercial real estate, owner-occupied | Pass |  |
Financing Receivable, Recorded Investment [Line Items] |  |
Loans excluding purchased credit-impaired loans | 224,502 | 219,060
Commercial real estate loans | Commercial real estate, owner-occupied | Special Mention |  |
Financing Receivable, Recorded Investment [Line Items] |  |
Loans excluding purchased credit-impaired loans | 4,478 | 12,371
Commercial real estate loans | Commercial real estate, owner-occupied | Substandard |  |
Financing Receivable, Recorded Investment [Line Items] |  |
Loans excluding purchased credit-impaired loans | 7,505 | 9,167
Commercial real estate loans | Commercial real estate, investor |  |
Financing Receivable, Recorded Investment [Line Items] |  |
Loans excluding purchased credit-impaired loans | 713,341 | 714,153
Total loans | 715,051 | 715,879
Commercial real estate loans | Commercial real estate, investor | Purchase credit-impaired |  |
Financing Receivable, Recorded Investment [Line Items] |  |
Purchase credit-impaired | 1,710 | 1,726
Commercial real estate loans | Commercial real estate, investor | Pass |  |
Financing Receivable, Recorded Investment [Line Items] |  |
Loans excluding purchased credit-impaired loans | 711,192 | 710,042
Commercial real estate loans | Commercial real estate, investor | Special Mention |  |
Financing Receivable, Recorded Investment [Line Items] |  |
Loans excluding purchased credit-impaired loans | 356 | 372
Commercial real estate loans | Commercial real estate, investor | Substandard |  |
Financing Receivable, Recorded Investment [Line Items] |  |
Loans excluding purchased credit-impaired loans | 1,793 | 3,739
Commercial real estate loans | Construction |  |
Financing Receivable, Recorded Investment [Line Items] |  |
Loans excluding purchased credit-impaired loans | 80,491 | 65,494
Total loans | 80,491 | 65,495
Commercial real estate loans | Construction | Purchase credit-impaired |  |
Financing Receivable, Recorded Investment [Line Items] |  |
Purchase credit-impaired | 0 | 1
Commercial real estate loans | Construction | Pass |  |
Financing Receivable, Recorded Investment [Line Items] |  |
Loans excluding purchased credit-impaired loans | 77,253 | 62,255
Commercial real estate loans | Construction | Special Mention |  |
Financing Receivable, Recorded Investment [Line Items] |  |
Loans excluding purchased credit-impaired loans | 0 | 0
Commercial real estate loans | Construction | Substandard |  |
Financing Receivable, Recorded Investment [Line Items] |  |
Loans excluding purchased credit-impaired loans | 3,238 | 3,239
Residential loans | Home equity |  |
Financing Receivable, Recorded Investment [Line Items] |  |
Loans excluding purchased credit-impaired loans | 111,140 | 112,232
Total loans | 111,211 | 112,300
Residential loans | Home equity | Purchase credit-impaired |  |
Financing Receivable, Recorded Investment [Line Items] |  |
Purchase credit-impaired | 71 | 68
Residential loans | Home equity | Pass |  |
Financing Receivable, Recorded Investment [Line Items] |  |
Loans excluding purchased credit-impaired loans | 108,908 | 109,959
Residential loans | Home equity | Special Mention |  |
Financing Receivable, Recorded Investment [Line Items] |  |
Loans excluding purchased credit-impaired loans | 1,120 | 1,100
Residential loans | Home equity | Substandard |  |
Financing Receivable, Recorded Investment [Line Items] |  |
Loans excluding purchased credit-impaired loans | 1,112 | 1,173
Residential loans | Other residential |  |
Financing Receivable, Recorded Investment [Line Items] |  |
Total loans | 77,769 | 73,154
Residential loans | Other residential | Purchase credit-impaired |  |
Financing Receivable, Recorded Investment [Line Items] |  |
Purchase credit-impaired | 0 | 0
Residential loans | Other residential | Pass |  |
Financing Receivable, Recorded Investment [Line Items] |  |
Total loans | 77,769 | 73,154
Residential loans | Other residential | Special Mention |  |
Financing Receivable, Recorded Investment [Line Items] |  |
Total loans | 0 | 0
Residential loans | Other residential | Substandard |  |
Financing Receivable, Recorded Investment [Line Items] |  |
Total loans | 0 | 0
Consumer loans | Installment and other consumer |  |
Financing Receivable, Recorded Investment [Line Items] |  |
Total loans | 24,396 | 22,639
Consumer loans | Installment and other consumer | Purchase credit-impaired |  |
Financing Receivable, Recorded Investment [Line Items] |  |
Purchase credit-impaired | 0 | 0
Consumer loans | Installment and other consumer | Pass |  |
Financing Receivable, Recorded Investment [Line Items] |  |
Total loans | 23,976 | 22,307
Consumer loans | Installment and other consumer | Special Mention |  |
Financing Receivable, Recorded Investment [Line Items] |  |
Total loans | 0 | 0
Consumer loans | Installment and other consumer | Substandard |  |
Financing Receivable, Recorded Investment [Line Items] |  |
Total loans | $ 420 | $ 332

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