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Loans - Nonaccrual Loans (Details) - USD ($) $ in Thousands	Jun. 30, 2017	Dec. 31, 2016	Jun. 30, 2016
Schedule of Financing Receivables [Line Items]
Nonaccrual loans	$ 7,434	$ 7,774	$ 6,478
Commercial | Real estate
Schedule of Financing Receivables [Line Items]
Nonaccrual loans	1,814	1,907	1,227
Commercial | Construction
Schedule of Financing Receivables [Line Items]
Nonaccrual loans	0	0	46
Commercial | Other
Schedule of Financing Receivables [Line Items]
Nonaccrual loans	885	964	378
Municipal
Schedule of Financing Receivables [Line Items]
Nonaccrual loans	0	0	0
Residential | Construction
Schedule of Financing Receivables [Line Items]
Nonaccrual loans	0	0	0
Residential | Term
Schedule of Financing Receivables [Line Items]
Nonaccrual loans	3,852	4,060	4,291
Home equity line of credit
Schedule of Financing Receivables [Line Items]
Nonaccrual loans	883	843	421
Consumer
Schedule of Financing Receivables [Line Items]
Nonaccrual loans	$ 0	$ 0	$ 115

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Recorded investment in financing receivables that are on nonaccrual status as of the balance sheet date.

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Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 310
-SubTopic 10
-Section 50
-Paragraph 7
-Subparagraph (a)
-URI http://asc.fasb.org/extlink&oid=84173941&loc=d3e5111-111524

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