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Consolidated Statements Of Comprehensive Income (Parenthetical) - USD ($)
$ in Thousands
3 Months Ended 9 Months Ended
Sep. 30, 2016
Sep. 30, 2015
Sep. 30, 2016
Sep. 30, 2015
Consolidated Statements Of Comprehensive Income [Abstract]        
Net unrealized appreciation (depreciation) on securities available for sale, tax $ (1,478) $ 1,739 $ 2,636 $ 439
Reclassification adjustment for net gains related to securities available for sale included in net income, tax (474) 0 (1,571) (422)
Net unrealized depreciation on interest rate derivatives, tax (32) (339) (458) (421)
Net amortization of prior service cost and actuarial loss for supplemental executive retirement plan, tax 3 3 7 2
Actuarial gains on supplemental executive retirement plan, tax $ 0 $ 0 $ 23 $ 0