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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 | 6 Months Ended
--- | --- | ---
Jun. 30, 2020 | Mar. 31, 2020 | Jun. 30, 2019 | Mar. 31, 2019 | Jun. 30, 2020 | Jun. 30, 2019
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items] |  |  |  |  |  |  |
Net gain on investment securities |  | $ 674 |  | $ 166 |  | $ 895 | $ 113
Interest income |  | 34,181 |  | 32,464 |  | 67,305 | 64,256
Income before income taxes |  | 13,573 |  | 14,340 |  | 15,022 | 28,888
Income tax benefit (expense) |  | (2,441) |  | (2,939) |  | (2,763) | (5,966)
Net income |  | 11,132 | $ 1,127 | 11,401 | $ 11,521 | 12,259 | 22,922
Total reclassified for the period |  | 192 |  | (230) |  | 88 | (621)
Securities Available for Sale and Transferred Securities [Member] |  |  |  |  |  |  |
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items] |  |  |  |  |  |  |
Reclassification before tax | [1] | 571 |  | 42 |  | 746 | (132)
Reclassification tax | [1] | (146) |  | (11) |  | (191) | 33
Total reclassified for the period | [1] | 425 |  | 31 |  | 555 | (99)
Prior Service Credit [Member] |  |  |  |  |  |  |
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items] |  |  |  |  |  |  |
Reclassification before tax | [2] | 9 |  | 17 |  | 18 | 33
Net Actuarial Losses [Member] |  |  |  |  |  |  |
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items] |  |  |  |  |  |  |
Reclassification before tax | [2] | (323) |  | (366) |  | (646) | (732)
Pension And Post-Retirement Obligations [Member] |  |  |  |  |  |  |
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items] |  |  |  |  |  |  |
Reclassification before tax |  | (314) |  | (349) |  | (628) | (699)
Reclassification tax |  | 81 |  | 88 |  | 161 | 177
Total reclassified for the period |  | (233) |  | (261) |  | (467) | (522)
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 |  | 674 |  | 166 |  | 895 | 113
Interest income |  | (103) |  | (124) |  | (149) | (245)
Income before income taxes |  | 571 |  | 42 |  | 746 | (132)
Income tax benefit (expense) |  | (146) |  | (11) |  | (191) | 33
Net income |  | $ 425 |  | $ 31 |  | $ 555 | $ (99)
[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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