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Comprehensive Income/Loss (Comprehensive Income/(Loss) Presented Net of Taxes) (Details) - USD ($) $ in Thousands | 3 Months Ended | 9 Months Ended
--- | --- | ---
Sep. 30, 2025 | Sep. 30, 2024 | Sep. 30, 2025 | Sep. 30, 2024
Equity [Abstract] |  |  |  |  |
Other Comprehensive Income (Loss), Cash Flow Hedge, Gain (Loss), after Reclassification, before Tax |  | $ 1,924 | $ 12,046 | $ 9,889 | $ 12,386
Other Comprehensive Income (Loss), Derivative, Excluded Component, Increase (Decrease), after Adjustments, Tax |  | (527) | (3,293) | (2,707) | (3,386)
Other Comprehensive Income (Loss), Cash Flow Hedge, Gain (Loss), after Reclassification and Tax |  | 1,397 | 8,753 | 7,182 | 9,000
COMPREHENSIVE INCOME |  |  |  |  |
Change in fair value of securities available for sale, pre tax amount |  | 11,822 | 36,678 | 45,829 | 38,084
Change in fair value of securities available for sale, tax (expense) benefit |  | (2,703) | (8,392) | (10,481) | (9,414)
Change in fair value of securities available for sale, after tax amount |  | 9,119 | 28,286 | 35,348 | 28,670
Other Comprehensive Income (Loss), Reclassification Adjustment from AOCI for Sale of Securities, before Tax |  | (64) | 0 | (64) | 0
Other Comprehensive Income (Loss), Reclassification Adjustment from AOCI for Sale of Securities, Tax |  | 14 | 0 | 14 | 0
Other Comprehensive Income (Loss), Reclassification Adjustment from AOCI for Sale of Securities, Net of Tax |  | (50) | 0 | (50) | 0
Change in fair value of securities available for sale, pre tax amount |  | 11,886 | 36,678 | 45,893 | 38,084
Change in fair value of securities available for sale, tax (expense) benefit |  | (2,717) | (8,392) | (10,495) | (9,414)
Change in fair value of securities available for sale, after tax amount |  | 9,169 | 28,286 | 35,398 | 28,670
Other Comprehensive Income (Loss), Cash Flow Hedge, Gain (Loss), before Reclassification and Tax |  | (347) | 7,144 | 2,439 | (3,402)
Other Comprehensive Income (Loss), Derivative, Excluded Component, Increase (Decrease), before Adjustments, Tax |  | 95 | (1,953) | (668) | 930
Other Comprehensive Income (Loss), Cash Flow Hedge, Gain (Loss), before Reclassification, after Tax |  | (252) | 5,191 | 1,771 | (2,472)
Other Comprehensive Income (Loss), Cash Flow Hedge, Gain (Loss), Reclassification, before Tax |  | (2,271) | (4,902) | (7,450) | (15,788)
Other Comprehensive Income (Loss), Derivative, Excluded Component, Increase (Decrease), Adjustments, Tax |  | 622 | 1,340 | 2,039 | 4,316
Other Comprehensive Income (Loss), Cash Flow Hedge, Gain (Loss), Reclassification, after Tax |  | (1,649) | (3,562) | (5,411) | (11,472)
Other Comprehensive Income (Loss), Defined Benefit Plan, Gain (Loss), Reclassification Adjustment from AOCI, before Tax |  | (66) | (24) | (199) | (74)
Other Comprehensive Income (Loss), Defined Benefit Plan, Gain (Loss), Reclassification Adjustment from AOCI, Tax |  | 18 | 6 | 54 | 20
Other Comprehensive Income (Loss), Defined Benefit Plan, Gain (Loss), Reclassification Adjustment from AOCI, after Tax |  | (48) | (18) | (145) | (54)
Amortization of certain costs included in net periodic retirement costs, pre tax amount |  | 4 | 4 | 13 | 13
Amortization of certain costs included in net periodic retirement costs, tax (expense) benefit |  | (1) | (2) | (3) | (4)
Other Comprehensive (Income) Loss, Defined Benefit Plan, Prior Service Cost (Credit), Reclassification Adjustment from AOCI, after Tax |  | 3 | 2 | 10 | 9
Other Comprehensive (Income) Loss, Defined Benefit Plan, after Reclassification Adjustment, before Tax | [1] | (62) | (20) | (186) | (61)
Other Comprehensive (Income) Loss, Defined Benefit Plan, after Reclassification Adjustment, Tax | [1] | 17 | 4 | 51 | 16
Other Comprehensive (Income) Loss, Defined Benefit Plan, after Reclassification Adjustment, after Tax | [1] | (45) | (16) | (135) | (45)
Total other comprehensive income, pre tax amount |  | 13,748 | 48,704 | 55,596 | 50,409
Total other comprehensive income, tax (expense) benefit |  | (3,227) | (11,681) | (13,151) | (12,784)
Total other comprehensive income, after tax amount |  | $ 10,521 | $ 37,023 | $ 42,445 | $ 37,625
[1] | The amortization of prior service costs is included in the computation of net periodic pension cost as disclosed in Note 12 - Employee Benefit Plans within the Notes to the Consolidated Financial Statements included in Item 8 of the 2024 Form 10-K.

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