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Accumulated Other Comprehensive Income (Loss) (Amounts Reclassified Out Of Each Component Of Accumulated Other Comprehensive Income (Loss)) (Details) - USD ($) $ in Thousands		3 Months Ended
		Mar. 31, 2017	Mar. 31, 2016
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Net gain on investment securities		$ 206	$ 613
Interest income		26,995	24,719
Income before income taxes		11,108	10,350
Income tax (expense) benefit		(3,165)	(2,732)
Net income		7,943	7,618
Total reclassified for the period		(46)	268
Securities Available for Sale and Transferred Securities [Member]
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Reclassification before tax	[1]	203	662
Reclassification tax	[1]	78	255
Total reclassified for the period	[1]	125	407
Prior Service Credit [Member]
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Reclassification before tax	[1]	13	12
Net Actuarial Losses [Member]
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Reclassification before tax	[1]	(292)	(239)
Pension And Post-Retirement Obligations [Member]
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Reclassification before tax		(279)	(227)
Reclassification tax		(108)	(88)
Total reclassified for the period		(171)	(139)
Reclassification out of Accumulated Other Comprehensive Income [Member] | Securities Available for Sale and Transferred Securities [Member]
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Net gain on investment securities		206	613
Interest income		(3)	49
Income before income taxes		203	662
Income tax (expense) benefit		(78)	(255)
Net income		$ 125	$ 407
[1] Includes amounts related to the amortization/accretion of unrealized net gains and losses related to the Company's reclassification of available for sale investment securities to the held to maturity category. The unrealized net gains/losses will be amortized/accreted over the remaining life of the investment securities as an adjustment of yield.

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- Definition

The net gain (loss) realized from the sale, exchange, redemption, or retirement of securities, not separately or otherwise categorized as trading, available-for-sale, or held-to-maturity.

+ References

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This element represents the income or loss from continuing operations attributable to the economic entity which may also be defined as revenue less expenses from ongoing operations, after income or loss from equity method investments, but before income taxes, extraordinary items, and noncontrolling interest.

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Amount of current income tax expense (benefit) and deferred income tax expense (benefit) pertaining to continuing operations.

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The portion of profit or loss for the period, net of income taxes, which is attributable to the parent.

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Amount before tax of reclassification adjustments of other comprehensive income (loss).

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Amount after tax of reclassification adjustments of other comprehensive income (loss).

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

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