Consolidated Statements Of Comprehensive Income (Parenthetical) - USD ($) $ in Thousands	12 Months Ended
Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Consolidated Statements Of Comprehensive Income [Abstract]
Net unrealized (depreciation) appreciation on securities available for sale, tax	$ (708)	$ 8,291	$ (7,926)
Reclassification adjustment for net (losses) gains related to securities available for sale included in net income, tax	(467)	(138)	(230)
Other-than-temporary impairment adjustment, tax	0	0	122
Non-credit portion of other-than-temporary impairment losses, tax	0	0	(37)
Net unrealized depreciation on interest rate derivatives, tax	484	389	0
Amortization of prior service cost and actuarial (loss) gain for supplemental executive retirement plan, tax	13	0	(36)
Actuarial (gain) loss on supplemental executive retirement plan, tax	$ 0	$ (59)	$ 51

Non-Credit Portion Of Other Than Temporary Impairment Losses, Tax

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Other Than Temporary Impairment Adjustment Tax

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Amount of tax (expense) benefit of reclassification adjustment from accumulated other comprehensive (income) loss for prior service cost (credit) related to pension and other postretirement benefit plans.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 220
-SubTopic 10
-Section 45
-Paragraph 15
-URI http://asc.fasb.org/extlink&oid=36458714&loc=d3e689-108580

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Amount of tax expense (benefit), after reclassification adjustments, of increase (decrease) in accumulated gain (loss) from derivative instruments designated and qualifying as the effective portion of cash flow hedges and an entity's share of an equity investee's increase (decrease) in deferred hedging gain (loss).

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 220
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-Section 45
-Paragraph 10A
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-URI http://asc.fasb.org/extlink&oid=36458714&loc=SL7669646-108580

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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 (loss) for actuarial gain (loss) related to pension and other postretirement benefit plans.

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Amount of tax expense (benefit) before reclassification adjustments of unrealized holding gain (loss) on available-for-sale securities.

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