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Troubled Debt Restructurings (Narrative) (Details) $ in Thousands	9 Months Ended		12 Months Ended
	Sep. 30, 2018 USD ($) contract	Sep. 30, 2017 contract	Dec. 31, 2017 USD ($) contract
Financing Receivable, Modifications [Line Items]
Number of troubled debt restructured loans	20		21
Loan is considered payment default	30 days
Financing Receivable, Modifications, Nonaccrual, Number of Contracts	2		1
Financing Receivable, Modifications, Nonaccrual, Recorded Investment | $	$ 122		$ 44
Troubled Debt Restructuring Modifications Number Of Contracts	1	0
Financing Receivable, Modifications, Subsequent Default, Recorded Investment	0
Total troubled debt restructured loans | $	$ 4,300		$ 4,400

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Number of financing receiviable modified loans that are in nonaccrual

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Financing Receivable, Modifications, Nonaccrual, Recorded Investment

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Period Past Due Loan Considered Payment Default

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Troubled debt restructuring modifications number of contracts.

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Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

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- Definition

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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The amount of the outstanding recorded investment related to 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 40
-Section 50
-Paragraph 4
-URI http://asc.fasb.org/extlink&oid=82895541&loc=d3e18845-111554

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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

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-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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