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Loans and Allowance for Loan Losses - Credit Quality of Loans (Details) - USD ($) $ in Thousands | Jun. 30, 2015 | Dec. 31, 2014
--- | --- | ---
Financing Receivable, Recorded Investment [Line Items] |  |
Total loans | $ 1,339,205 | $ 1,363,351
Purchase credit-impaired |  |
Financing Receivable, Recorded Investment [Line Items] |  |
Purchase credit-impaired | 5,071 | 5,192
Pass |  |
Financing Receivable, Recorded Investment [Line Items] |  |
Total loans | 1,286,491 | 1,293,968
Pass | Purchase credit-impaired |  |
Financing Receivable, Recorded Investment [Line Items] |  |
Purchase credit-impaired | 2,211 | 2,210
Special Mention |  |
Financing Receivable, Recorded Investment [Line Items] |  |
Total loans | 24,909 | 33,146
Special Mention | Purchase credit-impaired |  |
Financing Receivable, Recorded Investment [Line Items] |  |
Purchase credit-impaired | 1,027 | 1,140
Substandard |  |
Financing Receivable, Recorded Investment [Line Items] |  |
Total loans | 27,805 | 36,237
Substandard | Purchase credit-impaired |  |
Financing Receivable, Recorded Investment [Line Items] |  |
Purchase credit-impaired | 1,833 | 1,842
Commercial loans | Commercial and industrial |  |
Financing Receivable, Recorded Investment [Line Items] |  |
Loans excluding purchased credit-impaired loans | 184,829 | 209,899
Total loans | 185,020 | 210,223
Commercial loans | Commercial and industrial | Purchase credit-impaired |  |
Financing Receivable, Recorded Investment [Line Items] |  |
Purchase credit-impaired | 191 | 324
Commercial loans | Commercial and industrial | Pass |  |
Financing Receivable, Recorded Investment [Line Items] |  |
Loans excluding purchased credit-impaired loans | 171,350 | 197,659
Commercial loans | Commercial and industrial | Special Mention |  |
Financing Receivable, Recorded Investment [Line Items] |  |
Loans excluding purchased credit-impaired loans | 10,334 | 6,776
Commercial loans | Commercial and industrial | Substandard |  |
Financing Receivable, Recorded Investment [Line Items] |  |
Loans excluding purchased credit-impaired loans | 3,145 | 5,464
Commercial real estate loans | Commercial real estate, owner-occupied |  |
Financing Receivable, Recorded Investment [Line Items] |  |
Loans excluding purchased credit-impaired loans | 232,049 | 227,989
Total loans | 235,121 | 230,605
Commercial real estate loans | Commercial real estate, owner-occupied | Purchase credit-impaired |  |
Financing Receivable, Recorded Investment [Line Items] |  |
Purchase credit-impaired | 3,071 | 2,616
Commercial real estate loans | Commercial real estate, owner-occupied | Pass |  |
Financing Receivable, Recorded Investment [Line Items] |  |
Loans excluding purchased credit-impaired loans | 210,225 | 205,820
Commercial real estate loans | Commercial real estate, owner-occupied | Special Mention |  |
Financing Receivable, Recorded Investment [Line Items] |  |
Loans excluding purchased credit-impaired loans | 11,004 | 10,406
Commercial real estate loans | Commercial real estate, owner-occupied | Substandard |  |
Financing Receivable, Recorded Investment [Line Items] |  |
Loans excluding purchased credit-impaired loans | 10,820 | 11,763
Commercial real estate loans | Commercial real estate, investor |  |
Financing Receivable, Recorded Investment [Line Items] |  |
Loans excluding purchased credit-impaired loans | 661,622 | 671,325
Total loans | 663,357 | 673,499
Commercial real estate loans | Commercial real estate, investor | Purchase credit-impaired |  |
Financing Receivable, Recorded Investment [Line Items] |  |
Purchase credit-impaired | 1,735 | 2,174
Commercial real estate loans | Commercial real estate, investor | Pass |  |
Financing Receivable, Recorded Investment [Line Items] |  |
Loans excluding purchased credit-impaired loans | 654,056 | 651,548
Commercial real estate loans | Commercial real estate, investor | Special Mention |  |
Financing Receivable, Recorded Investment [Line Items] |  |
Loans excluding purchased credit-impaired loans | 2,116 | 13,304
Commercial real estate loans | Commercial real estate, investor | Substandard |  |
Financing Receivable, Recorded Investment [Line Items] |  |
Loans excluding purchased credit-impaired loans | 5,450 | 6,473
Commercial real estate loans | Construction |  |
Financing Receivable, Recorded Investment [Line Items] |  |
Loans excluding purchased credit-impaired loans | 48,748 | 48,402
Total loans | 48,754 | 48,413
Commercial real estate loans | Construction | Purchase credit-impaired |  |
Financing Receivable, Recorded Investment [Line Items] |  |
Purchase credit-impaired | 6 | 11
Commercial real estate loans | Construction | Pass |  |
Financing Receivable, Recorded Investment [Line Items] |  |
Loans excluding purchased credit-impaired loans | 45,471 | 41,710
Commercial real estate loans | Construction | Special Mention |  |
Financing Receivable, Recorded Investment [Line Items] |  |
Loans excluding purchased credit-impaired loans | 0 | 1,008
Commercial real estate loans | Construction | Substandard |  |
Financing Receivable, Recorded Investment [Line Items] |  |
Loans excluding purchased credit-impaired loans | 3,277 | 5,684
Residential loans | Home equity |  |
Financing Receivable, Recorded Investment [Line Items] |  |
Loans excluding purchased credit-impaired loans | 115,426 | 110,721
Total loans | 115,493 | 110,788
Residential loans | Home equity | Purchase credit-impaired |  |
Financing Receivable, Recorded Investment [Line Items] |  |
Purchase credit-impaired | 68 | 67
Residential loans | Home equity | Pass |  |
Financing Receivable, Recorded Investment [Line Items] |  |
Loans excluding purchased credit-impaired loans | 113,616 | 107,933
Residential loans | Home equity | Special Mention |  |
Financing Receivable, Recorded Investment [Line Items] |  |
Loans excluding purchased credit-impaired loans | 428 | 322
Residential loans | Home equity | Substandard |  |
Financing Receivable, Recorded Investment [Line Items] |  |
Loans excluding purchased credit-impaired loans | 1,382 | 2,466
Residential loans | Other residential |  |
Financing Receivable, Recorded Investment [Line Items] |  |
Total loans | 73,721 | 73,035
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 | 72,123 | 70,987
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 | 1,598 | 2,048
Consumer loans | Installment and other consumer |  |
Financing Receivable, Recorded Investment [Line Items] |  |
Total loans | 17,739 | 16,788
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 | 17,439 | 16,101
Consumer loans | Installment and other consumer | Special Mention |  |
Financing Receivable, Recorded Investment [Line Items] |  |
Total loans | 0 | 190
Consumer loans | Installment and other consumer | Substandard |  |
Financing Receivable, Recorded Investment [Line Items] |  |
Total loans | $ 300 | $ 497

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