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Loans and Allowance for Loan Losses - Credit Quality (Details) - USD ($) $ in Thousands | Mar. 31, 2019 | Dec. 31, 2018
--- | --- | ---
Financing Receivable, Recorded Investment [Line Items] |  |
Total loans | $ 1,772,538 | $ 1,763,864
Pass |  |
Financing Receivable, Recorded Investment [Line Items] |  |
Total loans | 1,739,565 | 1,733,916
Special Mention |  |
Financing Receivable, Recorded Investment [Line Items] |  |
Total loans | 18,162 | 17,340
Substandard |  |
Financing Receivable, Recorded Investment [Line Items] |  |
Total loans | 14,811 | 12,608
Purchased credit-impaired |  |
Financing Receivable, Recorded Investment [Line Items] |  |
Purchased credit-impaired | 2,098 | 2,112
Purchased credit-impaired | Pass |  |
Financing Receivable, Recorded Investment [Line Items] |  |
Purchased credit-impaired | 2,098 | 2,112
Purchased credit-impaired | Special Mention |  |
Financing Receivable, Recorded Investment [Line Items] |  |
Purchased credit-impaired | 0 | 0
Purchased credit-impaired | Substandard |  |
Financing Receivable, Recorded Investment [Line Items] |  |
Purchased credit-impaired | 0 | 0
Commercial loans | Commercial and industrial |  |
Financing Receivable, Recorded Investment [Line Items] |  |
Loans excluding purchased credit-impaired loans | 237,620 | 230,708
Total loans | 237,646 | 230,739
Commercial loans | Commercial and industrial | Pass |  |
Financing Receivable, Recorded Investment [Line Items] |  |
Loans excluding purchased credit-impaired loans | 226,164 | 219,625
Commercial loans | Commercial and industrial | Special Mention |  |
Financing Receivable, Recorded Investment [Line Items] |  |
Loans excluding purchased credit-impaired loans | 10,312 | 9,957
Commercial loans | Commercial and industrial | Substandard |  |
Financing Receivable, Recorded Investment [Line Items] |  |
Loans excluding purchased credit-impaired loans | 1,144 | 1,126
Commercial loans | Purchased credit-impaired | Commercial and industrial |  |
Financing Receivable, Recorded Investment [Line Items] |  |
Purchased credit-impaired | 26 | 31
Commercial real estate loans | Commercial real estate, owner-occupied |  |
Financing Receivable, Recorded Investment [Line Items] |  |
Loans excluding purchased credit-impaired loans | 309,412 | 312,090
Total loans | 310,588 | 313,277
Commercial real estate loans | Commercial real estate, owner-occupied | Pass |  |
Financing Receivable, Recorded Investment [Line Items] |  |
Loans excluding purchased credit-impaired loans | 294,713 | 299,998
Commercial real estate loans | Commercial real estate, owner-occupied | Special Mention |  |
Financing Receivable, Recorded Investment [Line Items] |  |
Loans excluding purchased credit-impaired loans | 4,613 | 4,106
Commercial real estate loans | Commercial real estate, owner-occupied | Substandard |  |
Financing Receivable, Recorded Investment [Line Items] |  |
Loans excluding purchased credit-impaired loans | 10,086 | 7,986
Commercial real estate loans | Commercial real estate, investor |  |
Financing Receivable, Recorded Investment [Line Items] |  |
Loans excluding purchased credit-impaired loans | 877,678 | 872,599
Total loans | 878,494 | 873,410
Commercial real estate loans | Commercial real estate, investor | Pass |  |
Financing Receivable, Recorded Investment [Line Items] |  |
Loans excluding purchased credit-impaired loans | 875,562 | 870,443
Commercial real estate loans | Commercial real estate, investor | Special Mention |  |
Financing Receivable, Recorded Investment [Line Items] |  |
Loans excluding purchased credit-impaired loans | 2,116 | 2,156
Commercial real estate loans | Commercial real estate, investor | Substandard |  |
Financing Receivable, Recorded Investment [Line Items] |  |
Loans excluding purchased credit-impaired loans | 0 | 0
Commercial real estate loans | Construction |  |
Financing Receivable, Recorded Investment [Line Items] |  |
Loans excluding purchased credit-impaired loans | 72,271 | 76,423
Total loans | 72,271 | 76,423
Commercial real estate loans | Construction | Pass |  |
Financing Receivable, Recorded Investment [Line Items] |  |
Loans excluding purchased credit-impaired loans | 69,580 | 73,735
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 | 2,691 | 2,688
Commercial real estate loans | Purchased credit-impaired | Commercial real estate, owner-occupied |  |
Financing Receivable, Recorded Investment [Line Items] |  |
Purchased credit-impaired | 1,176 | 1,187
Commercial real estate loans | Purchased credit-impaired | Commercial real estate, investor |  |
Financing Receivable, Recorded Investment [Line Items] |  |
Purchased credit-impaired | 816 | 811
Commercial real estate loans | Purchased credit-impaired | Construction |  |
Financing Receivable, Recorded Investment [Line Items] |  |
Purchased credit-impaired | 0 | 0
Residential loans | Home equity |  |
Financing Receivable, Recorded Investment [Line Items] |  |
Loans excluding purchased credit-impaired loans | 124,432 | 124,613
Total loans | 124,512 | 124,696
Residential loans | Home equity | Pass |  |
Financing Receivable, Recorded Investment [Line Items] |  |
Loans excluding purchased credit-impaired loans | 122,578 | 122,844
Residential loans | Home equity | Special Mention |  |
Financing Receivable, Recorded Investment [Line Items] |  |
Loans excluding purchased credit-impaired loans | 1,121 | 1,121
Residential loans | Home equity | Substandard |  |
Financing Receivable, Recorded Investment [Line Items] |  |
Loans excluding purchased credit-impaired loans | 733 | 648
Residential loans | Other residential |  |
Financing Receivable, Recorded Investment [Line Items] |  |
Total loans | 117,558 | 117,847
Residential loans | Other residential | Pass |  |
Financing Receivable, Recorded Investment [Line Items] |  |
Total loans | 117,558 | 117,847
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
Residential loans | Purchased credit-impaired | Home equity |  |
Financing Receivable, Recorded Investment [Line Items] |  |
Purchased credit-impaired | 80 | 83
Residential loans | Purchased credit-impaired | Other residential |  |
Financing Receivable, Recorded Investment [Line Items] |  |
Purchased credit-impaired | 0 | 0
Consumer loans | Installment and other consumer |  |
Financing Receivable, Recorded Investment [Line Items] |  |
Total loans | 31,469 | 27,472
Consumer loans | Installment and other consumer | Pass |  |
Financing Receivable, Recorded Investment [Line Items] |  |
Total loans | 31,312 | 27,312
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 | 157 | 160
Consumer loans | Purchased credit-impaired | Installment and other consumer |  |
Financing Receivable, Recorded Investment [Line Items] |  |
Purchased credit-impaired | $ 0 | $ 0

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