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Loans (Narrative) (Details) $ in Thousands	3 Months Ended
	Mar. 31, 2018 USD ($) contract	Mar. 31, 2017 contract	Dec. 31, 2017 USD ($)
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans held for sale	$ 1,523		$ 2,718
Past due greater than 90 days and still accruing interest	0		0
Past Due Loans	$ 3,579		6,522
Number of loans modified as TDR | contract	0	0
Number of loans modified as TDR that defaulted within the previous 12 months | contract	0	0
Consumer Overdrafts [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Past due greater than 90 days and still accruing interest	$ 17		11
Residential Real Estate Loans [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans held for sale	1,500		2,700
Past Due Loans	963		1,964
Commercial Business [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Past Due Loans	127		100
Greater than 90 Days [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Past Due Loans	$ 17		$ 11

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Number of financing receivables that have been modified by troubled debt restructurings.

+ 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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Number of financing receivables that have been modified by troubled debt restructurings within the previous 12 months and for which there was a payment default.

+ References

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-Publisher FASB
-Name Accounting Standards Codification
-Topic 310
-SubTopic 10
-Section 50
-Paragraph 34
-URI http://asc.fasb.org/extlink&oid=84173941&loc=SL6953682-111524

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Recorded investment in financing receivables that are 90 days or more past due and still accruing.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 310
-SubTopic 10
-Section 50
-Paragraph 7
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Recorded Investment in financing receivables that are past due at the balance sheet date.

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-Name Accounting Standards Codification
-Topic 310
-SubTopic 10
-Section 50
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-URI http://asc.fasb.org/extlink&oid=84173941&loc=SL6953401-111524

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Amount, after allowance for bad debt, of loan receivables held-for-sale that are not part of a disposal group. Excludes loans and leases covered under loss sharing agreements and loans classified as debt securities.

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-Name Accounting Standards Codification
-Topic 310
-SubTopic 10
-Section 45
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-URI http://asc.fasb.org/extlink&oid=82891408&loc=d3e4428-111522

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