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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, 2019 | Jun. 30, 2019 | Mar. 31, 2019 | Sep. 30, 2018 | Jun. 30, 2018 | Mar. 31, 2018 | Sep. 30, 2019 | Sep. 30, 2018
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items] |  |  |  |  |  |  |  |  |
Net loss (gain) on investment securities |  | $ 1,608 |  |  | $ (95) |  |  | $ 1,721 | $ (88)
Interest income |  | 32,483 |  |  | 30,903 |  |  | 96,739 | 90,835
Income before income taxes |  | 17,114 |  |  | 13,137 |  |  | 46,002 | 39,842
Income tax expense |  | (4,281) |  |  | (2,560) |  |  | (10,247) | (7,807)
Net income |  | 12,833 | $ 11,401 | $ 11,521 | 10,577 | $ 12,170 | $ 9,288 | 35,755 | 32,035
Total reclassified for the period |  | 854 |  |  | (284) |  |  | 233 | (666)
Securities Available for Sale and Transferred Securities [Member] |  |  |  |  |  |  |  |  |
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items] |  |  |  |  |  |  |  |  |
Reclassification before tax | [1] | 1,492 |  |  | (209) |  |  | 1,360 | (381)
Reclassification tax | [1] | (376) |  |  | 52 |  |  | (343) | 96
Total reclassified for the period | [1] | 1,116 |  |  | (157) |  |  | 1,017 | (285)
Prior Service Credit [Member] |  |  |  |  |  |  |  |  |
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items] |  |  |  |  |  |  |  |  |
Reclassification before tax | [2] | 16 |  |  | 18 |  |  | 49 | 54
Net Actuarial Losses [Member] |  |  |  |  |  |  |  |  |
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items] |  |  |  |  |  |  |  |  |
Reclassification before tax | [2] | (366) |  |  | (188) |  |  | (1,098) | (563)
Pension And Post-Retirement Obligations [Member] |  |  |  |  |  |  |  |  |
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items] |  |  |  |  |  |  |  |  |
Reclassification before tax |  | (350) |  |  | (170) |  |  | (1,049) | (509)
Reclassification tax |  | 88 |  |  | 43 |  |  | 265 | 128
Total reclassified for the period |  | (262) |  |  | (127) |  |  | (784) | (381)
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 |  | 1,608 |  |  | (95) |  |  | 1,721 | (88)
Interest income |  | (116) |  |  | (114) |  |  | (361) | (293)
Income before income taxes |  | 1,492 |  |  | (209) |  |  | 1,360 | (381)
Income tax expense |  | (376) |  |  | 52 |  |  | (343) | 96
Net income |  | $ 1,116 |  |  | $ (157) |  |  | $ 1,017 | $ (285)
[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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