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Change in Accumulated Other Comprehensive Income (Narrative) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Accumulated Other Comprehensive Income (Loss) [Line Items]
Reclassifications from other comprehensive (loss) income	$ (3)	$ 98	$ (113)
Loss on derecognition of cash flow hedge	0	0
Accumulated Net Investment Gain (Loss) Attributable to Parent [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Reclassifications from other comprehensive (loss) income	(10)	98	124
Other Comprehensive Income (Loss), Reclassification Adjustment from AOCI for Sale of Securities, Tax	(4)	$ 33	42
Accumulated Defined Benefit Plans Adjustment Attributable to Parent [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Reclassifications from other comprehensive (loss) income	7
Other Comprehensive Income (Loss), Defined Benefit Plan, Gain (Loss), Reclassification Adjustment from AOCI, Tax	$ 2
Change In Fair Value Of Interest Rate Swap [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Reclassifications from other comprehensive (loss) income			(237)
Loss on derecognition of cash flow hedge			237
Other Comprehensive Income (Loss), Reclassification Adjustment from AOCI on Derivatives, Tax			$ 81

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The loss recognized in earnings during the reporting period representing the amount of the cash flow hedges' ineffectiveness.

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-Publisher FASB
-Name Accounting Standards Codification
-Topic 815
-SubTopic 10
-Section 50
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Amount of tax expense (benefit) of reclassification adjustment from accumulated other comprehensive income for unrealized gain (loss) realized upon the sale of available-for-sale securities.

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Reference 1: http://www.xbrl.org/2003/role/presentationRef
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Amount of tax expense (benefit) of reclassification adjustment from accumulated other comprehensive income of accumulated gain (loss) realized from derivative instruments designated and qualifying as the effective portion of cash flow hedges and an entity's share of an equity investee's deferred hedging gain (loss).

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Amount of tax expense (benefit) of reclassification adjustment from accumulated other comprehensive income (loss) for gain (loss) of defined benefit plan.

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