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Troubled Debt Restructurings (Narrative) (Details) $ in Thousands	3 Months Ended	9 Months Ended		12 Months Ended
	Sep. 30, 2016 contract	Sep. 30, 2017 USD ($) contract	Sep. 30, 2016 contract	Dec. 31, 2016 USD ($) contract
Financing Receivable, Modifications [Line Items]
Number of troubled debt restructured loans		20		26
Loan is considered payment default		30 days
Financing Receivable, Modifications, Nonaccrual, Number of Contracts		1		6
Financing Receivable, Modifications, Nonaccrual, Recorded Investment | $		$ 46		$ 1,600
Troubled Debt Restructuring Modifications Number Of Contracts	2	0	4
Total troubled debt restructured loans | $		$ 4,400		$ 7,300
Residential Single Family and Commercial Real Estate Non Owner Occupied [Member]
Financing Receivable, Modifications [Line Items]
Troubled Debt Restructuring Modifications Number Of Contracts			2
Residential Single Family
Financing Receivable, Modifications [Line Items]
Troubled Debt Restructuring Modifications Number Of Contracts	2		3
Trouble Debt Restructuring Modifications Payment Reduction Number of Contracts	2
Troubled Debt Restructuring Modifications Amortization Period Number of Contracts			1
Commercial Real Estate Non-Owner Occupied
Financing Receivable, Modifications [Line Items]
Troubled Debt Restructuring Modifications Number Of Contracts			1
Troubled Debt Restructuring Modifications Amortization Period Number of Contracts			1
Troubled Debt Restructurings Within Previous Twelve Months [Member]
Financing Receivable, Modifications [Line Items]
Number of troubled debt restructured loans			1
Troubled Debt Restructurings Within Previous Twelve Months [Member] | Residential Single Family
Financing Receivable, Modifications [Line Items]
Number of troubled debt restructured loans			1

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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 50
-Paragraph 33
-URI http://asc.fasb.org/extlink&oid=84173941&loc=SL6953676-111524

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Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 310
-SubTopic 40
-Section 50
-Paragraph 4
-URI http://asc.fasb.org/extlink&oid=82895541&loc=d3e18845-111554

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