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Loans - Nonaccrual Loans (Details) - USD ($) $ in Thousands	Mar. 31, 2017	Dec. 31, 2016	Mar. 31, 2016
Schedule of Financing Receivables [Line Items]
Nonaccrual loans	$ 8,500	$ 7,774	$ 6,687
Commercial | Real estate
Schedule of Financing Receivables [Line Items]
Nonaccrual loans	2,625	1,907	920
Commercial | Construction
Schedule of Financing Receivables [Line Items]
Nonaccrual loans	0	0	180
Commercial | Other
Schedule of Financing Receivables [Line Items]
Nonaccrual loans	938	964	69
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	4,028	4,060	4,677
Home equity line of credit
Schedule of Financing Receivables [Line Items]
Nonaccrual loans	909	843	841
Consumer
Schedule of Financing Receivables [Line Items]
Nonaccrual loans	$ 0	$ 0	$ 0

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

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Glossary Recorded Investment
-URI http://asc.fasb.org/extlink&oid=65880944

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 310
-SubTopic 10
-Section 50
-Paragraph 7
-Subparagraph (d)
-URI http://asc.fasb.org/extlink&oid=66008989&loc=d3e5111-111524

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