Loans - Modified Loans (Details) $ in Thousands	12 Months Ended
Dec. 31, 2017 USD ($) Number	Dec. 31, 2016 USD ($) Number
Financing Receivable, Modifications [Line Items]
Number of Contracts \| Number	2	5
Pre-Modification Outstanding Recorded Investment	$ 67	$ 1,189
Post-Modification Outstanding Recorded Investment	61	1,037
Valuation Allowance Recorded	$ 6	$ 152
Construction and Land Development [Member]
Financing Receivable, Modifications [Line Items]
Number of Contracts \| Number	1	1
Pre-Modification Outstanding Recorded Investment	$ 52	$ 20
Post-Modification Outstanding Recorded Investment	46	18
Valuation Allowance Recorded	$ 6	$ 2
Residential Real Estate [Member]
Financing Receivable, Modifications [Line Items]
Number of Contracts \| Number	1	4
Pre-Modification Outstanding Recorded Investment	$ 15	$ 1,169
Post-Modification Outstanding Recorded Investment	15	1,019
Valuation Allowance Recorded	$ 0	$ 150

Financing receivable modified valuation allowance recorded trouble debt restructuring.

No definition available.

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- Definition

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.

+ References

No definition available.

+ Details

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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

+ Details

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- Definition

Post-modification amount of investment in financing receivables modified by troubled debt restructurings.

+ References

+ Details

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- Definition

Pre-modification amount of investment in financing receivables modified by troubled debt restructurings.

+ References

+ Details

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- Details

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