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Derivative Instruments (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016
Derivative [Line Items]
Derivative, Notional Amount1	$ 7,234	$ 7,934
Derivative Asset Fair Value Gross Asset	52	241
Derivative Asset, Fair Value, Gross Liability	52	241
Derivative, Gain (Loss) on Derivative, Net	0	0
Derivative, Interest Rate Swap, Pay Fixed, Receive Variable [Member]
Derivative [Line Items]
Derivative, Notional Amount1	3,617	3,967
Derivative Asset Fair Value Gross Asset	0	0
Derivative Asset, Fair Value, Gross Liability	52	241
Derivative, Gain (Loss) on Derivative, Net	189	199
Derivative, Interest Rate Swap, Pay Variable, Receive Fixed [Member]
Derivative [Line Items]
Derivative, Notional Amount1	3,617	3,967
Derivative Asset Fair Value Gross Asset	52	241
Derivative Asset, Fair Value, Gross Liability	0	0
Derivative, Gain (Loss) on Derivative, Net	$ (189)	$ (199)

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Fair value of liability associated with financial asset or other contract with one or more underlyings, notional amount or payment provision or both, and the contract can be net settled by means outside the contract or delivery of an asset.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 20
-Section 55
-Paragraph 8
-URI http://asc.fasb.org/extlink&oid=51825145&loc=SL20226003-175313

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Fair value, before effects of master netting arrangements, of a financial asset or other contract with one or more underlyings, notional amount or payment provision or both, and the contract can be net settled by means outside the contract or delivery of an asset. Includes assets elected not to be offset. Excludes assets not subject to a master netting arrangement.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 20
-Section 50
-Paragraph 3
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Amount of increase (decrease) in the fair value of derivatives recognized in the income statement.

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