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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 | 9 Months Ended
--- | --- | ---
Sep. 30, 2018 | Sep. 30, 2017 | Sep. 30, 2018 | Sep. 30, 2017
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items] |  |  |  |  |
Net (loss) gain on investment securities |  | $ (95) | $ 184 | $ (88) | $ 600
Interest income |  | 30,821 | 28,438 | 90,534 | 82,855
Income before income taxes |  | 13,137 | 11,743 | 39,842 | 31,833
Income tax (expense) benefit |  | (2,560) | (3,464) | (7,807) | (9,365)
Net income |  | 10,577 | 8,279 | 32,035 | 22,468
Total reclassified for the period |  | (284) | (92) | (666) | (197)
Securities Available for Sale and Transferred Securities [Member] |  |  |  |  |
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items] |  |  |  |  |
Reclassification before tax | [1] | (209) | 127 | (381) | 514
Reclassification tax | [1] | 52 | (48) | 96 | (198)
Total reclassified for the period | [1] | (157) | 79 | (285) | 316
Prior Service Credit [Member] |  |  |  |  |
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items] |  |  |  |  |
Reclassification before tax | [2] | 18 | 12 | 54 | 38
Net Actuarial Losses [Member] |  |  |  |  |
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items] |  |  |  |  |
Reclassification before tax | [2] | (188) | (291) | (563) | (874)
Pension And Post-Retirement Obligations [Member] |  |  |  |  |
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items] |  |  |  |  |
Reclassification before tax |  | (170) | (279) | (509) | (836)
Reclassification tax |  | 43 | 108 | 128 | 323
Total reclassified for the period |  | (127) | (171) | (381) | (513)
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 |  | (95) | 184 | (88) | 600
Interest income |  | (114) | (57) | (293) | (86)
Income before income taxes |  | (209) | 127 | (381) | 514
Income tax (expense) benefit |  | 52 | (48) | 96 | (198)
Net income |  | $ (157) | $ 79 | $ (285) | $ 316
[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 11 – Employee Benefit Plans for additional information.

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