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Loans and Allowance for Loan Losses - Credit Quality of Loans (Details) - USD ($) $ in Thousands	Sep. 30, 2017	Dec. 31, 2016
Financing Receivable, Recorded Investment [Line Items]
Total loans	$ 1,524,447	$ 1,486,616
Purchased credit-impaired
Financing Receivable, Recorded Investment [Line Items]
Purchased credit-impaired	2,272	2,920
Pass
Financing Receivable, Recorded Investment [Line Items]
Total loans	1,474,374	1,451,049
Pass | Purchased credit-impaired
Financing Receivable, Recorded Investment [Line Items]
Purchased credit-impaired	2,272	2,920
Special Mention
Financing Receivable, Recorded Investment [Line Items]
Total loans	16,590	15,937
Special Mention | Purchased credit-impaired
Financing Receivable, Recorded Investment [Line Items]
Purchased credit-impaired	0	0
Substandard
Financing Receivable, Recorded Investment [Line Items]
Total loans	33,483	19,630
Substandard | Purchased credit-impaired
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	218,644	218,575
Total loans	218,681	218,615
Commercial loans | Commercial and industrial | Purchased credit-impaired
Financing Receivable, Recorded Investment [Line Items]
Purchased credit-impaired	37	40
Commercial loans | Commercial and industrial | Pass
Financing Receivable, Recorded Investment [Line Items]
Loans excluding purchased credit-impaired loans	195,500	201,987
Commercial loans | Commercial and industrial | Special Mention
Financing Receivable, Recorded Investment [Line Items]
Loans excluding purchased credit-impaired loans	6,153	9,197
Commercial loans | Commercial and industrial | Substandard
Financing Receivable, Recorded Investment [Line Items]
Loans excluding purchased credit-impaired loans	16,991	7,391
Commercial real estate loans | Commercial real estate, owner-occupied
Financing Receivable, Recorded Investment [Line Items]
Loans excluding purchased credit-impaired loans	263,592	246,641
Total loans	264,732	247,713
Commercial real estate loans | Commercial real estate, owner-occupied | Purchased credit-impaired
Financing Receivable, Recorded Investment [Line Items]
Purchased credit-impaired	1,140	1,072
Commercial real estate loans | Commercial real estate, owner-occupied | Pass
Financing Receivable, Recorded Investment [Line Items]
Loans excluding purchased credit-impaired loans	244,100	234,849
Commercial real estate loans | Commercial real estate, owner-occupied | Special Mention
Financing Receivable, Recorded Investment [Line Items]
Loans excluding purchased credit-impaired loans	10,437	4,799
Commercial real estate loans | Commercial real estate, owner-occupied | Substandard
Financing Receivable, Recorded Investment [Line Items]
Loans excluding purchased credit-impaired loans	9,055	6,993
Commercial real estate loans | Commercial real estate, investor
Financing Receivable, Recorded Investment [Line Items]
Loans excluding purchased credit-impaired loans	720,578	722,522
Total loans	721,576	724,228
Commercial real estate loans | Commercial real estate, investor | Purchased credit-impaired
Financing Receivable, Recorded Investment [Line Items]
Purchased credit-impaired	998	1,706
Commercial real estate loans | Commercial real estate, investor | Pass
Financing Receivable, Recorded Investment [Line Items]
Loans excluding purchased credit-impaired loans	717,760	720,417
Commercial real estate loans | Commercial real estate, investor | Special Mention
Financing Receivable, Recorded Investment [Line Items]
Loans excluding purchased credit-impaired loans	0	607
Commercial real estate loans | Commercial real estate, investor | Substandard
Financing Receivable, Recorded Investment [Line Items]
Loans excluding purchased credit-impaired loans	2,818	1,498
Commercial real estate loans | Construction
Financing Receivable, Recorded Investment [Line Items]
Loans excluding purchased credit-impaired loans	76,179	74,809
Total loans	76,179	74,809
Commercial real estate loans | Construction | Purchased credit-impaired
Financing Receivable, Recorded Investment [Line Items]
Purchased credit-impaired	0	0
Commercial real estate loans | Construction | Pass
Financing Receivable, Recorded Investment [Line Items]
Loans excluding purchased credit-impaired loans	73,210	71,564
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	2,969	3,245
Residential loans | Home equity
Financing Receivable, Recorded Investment [Line Items]
Loans excluding purchased credit-impaired loans	121,269	117,105
Total loans	121,366	117,207
Residential loans | Home equity | Purchased credit-impaired
Financing Receivable, Recorded Investment [Line Items]
Purchased credit-impaired	97	102
Residential loans | Home equity | Pass
Financing Receivable, Recorded Investment [Line Items]
Loans excluding purchased credit-impaired loans	119,856	115,680
Residential loans | Home equity | Special Mention
Financing Receivable, Recorded Investment [Line Items]
Loans excluding purchased credit-impaired loans	0	1,334
Residential loans | Home equity | Substandard
Financing Receivable, Recorded Investment [Line Items]
Loans excluding purchased credit-impaired loans	1,413	91
Residential loans | Other residential
Financing Receivable, Recorded Investment [Line Items]
Total loans	96,937	78,549
Residential loans | Other residential | Purchased credit-impaired
Financing Receivable, Recorded Investment [Line Items]
Purchased credit-impaired	0	0
Residential loans | Other residential | Pass
Financing Receivable, Recorded Investment [Line Items]
Total loans	96,937	78,549
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	24,976	25,495
Consumer loans | Installment and other consumer | Purchased credit-impaired
Financing Receivable, Recorded Investment [Line Items]
Purchased credit-impaired	0	0
Consumer loans | Installment and other consumer | Pass
Financing Receivable, Recorded Investment [Line Items]
Total loans	24,739	25,083
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	$ 237	$ 412

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Loans and Leases Receivable, Net of Deferred Income, Excluding Purchased Credit-impaired Loans

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+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 310
-SubTopic 10
-Section 45
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