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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, 2019 | Mar. 31, 2018
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items] |  |  |
Net (loss) gain on investment securities |  | $ (53) |
Interest income |  | 31,792 | $ 29,702
Income before income taxes |  | 14,548 | 11,556
Income tax expense |  | (3,027) | (2,268)
Net income |  | 11,521 | 9,288
Total reclassified for the period |  | (391) | (188)
Securities Available for Sale and Transferred Securities [Member] |  |  |
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items] |  |  |
Reclassification before tax | [1] | (174) | (82)
Reclassification tax | [1] | 44 | 21
Total reclassified for the period | [1] | (130) | (61)
Prior Service Credit [Member] |  |  |
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items] |  |  |
Reclassification before tax | [2] | 16 | 18
Net Actuarial Losses [Member] |  |  |
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items] |  |  |
Reclassification before tax | [2] | (366) | (187)
Pension And Post-Retirement Obligations [Member] |  |  |
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items] |  |  |
Reclassification before tax |  | (350) | (169)
Reclassification tax |  | 89 | 42
Total reclassified for the period |  | (261) | (127)
Reclassification out of Accumulated Other Comprehensive Income | Securities Available for Sale and Transferred Securities [Member] |  |  |
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items] |  |  |
Net (loss) gain on investment securities |  | (53) |
Interest income |  | (121) | (82)
Income before income taxes |  | (174) | (82)
Income tax expense |  | 44 | 21
Net income |  | $ (130) | $ (61)
[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.
[2] | These items are included in the computation of net periodic pension expense. See Note 12 – Employee Benefit Plans for additional information.

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