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Other Comprehensive Income (Loss) (Tables) | 9 Months Ended
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Sep. 30, 2023
Equity [Abstract] |
Schedule of Tax Effects of Components of Other Comprehensive Income (Loss) | The following tables present the change in components of other comprehensive income (loss) for the periods presented, net of tax effects.
| Three Months Ended September 30, 2023 |  | Three Months Ended September 30, 2022
(dollars in thousands) | Pre-Tax Amount |  | Tax Benefit |  | Net of Tax Amount |  | Pre-Tax Amount |  | Tax Benefit |  | Net of Tax Amount
Change in net unrealized gains (losses) on available-for-sale debt securities |  | $ | (12,977) |  |  |  | $ | 2,696 |  |  |  | $ | (10,281) |  |  |  | $ | (42,741) |  |  |  | $ | 9,121 |  |  |  | $ | (33,620) |
Change in interest rate swap |  | (2,073) |  |  |  | 426 |  |  |  | (1,647) |  |  |  | (16,852) |  |  |  | 3,596 |  |  |  | (13,256) |
Adjustment to funded status of employee benefit plans |  | 440 |  |  |  | (105) |  |  |  | 335 |  |  |  | (1,170) |  |  |  | 250 |  |  |  | (920) |
Other Comprehensive Income (Loss) |  | $ | (14,610) |  |  |  | $ | 3,017 |  |  |  | $ | (11,593) |  |  |  | $ | (60,763) |  |  |  | $ | 12,967 |  |  |  | $ | (47,796) |
| Nine Months Ended September 30, 2023 |  | Nine Months Ended September 30, 2022
(dollars in thousands) | Pre-Tax Amount |  | Tax Benefit |  | Net of Tax Amount |  | Pre-Tax Amount |  | Tax Benefit |  | Net of Tax Amount
Change in net unrealized gains (losses) on available-for-sale debt securities |  | $ | (13,107) |  |  |  | $ | 2,708 |  |  |  | $ | (10,399) |  |  |  | $ | (114,011) |  |  |  | $ | 24,325 |  |  |  | $ | (89,686) |
Change in interest rate swap |  | (4,300) |  |  |  | 902 |  |  |  | (3,399) |  |  |  | (22,724) |  |  |  | 4,849 |  |  |  | (17,875) |
Adjustment to funded status of employee benefit plans |  | 365 |  |  |  | (79) |  |  |  | 287 |  |  |  | (416) |  |  |  | 100 |  |  |  | (316) |
Other Comprehensive Income (Loss) |  | $ | (17,042) |  |  |  | $ | 3,531 |  |  |  | $ | (13,511) |  |  |  | $ | (137,151) |  |  |  | $ | 29,274 |  |  |  | $ | (107,877) |

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- Definition Tabular disclosure of the net gain (loss) and net prior service cost or credit recognized in other comprehensive income (loss) for the period for pension plans and/or other employee benefit plans, and reclassification adjustments of other comprehensive income (loss) for the period, as those amounts, including amortization of the net transition asset or obligation, are recognized as components of net periodic benefit cost. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Topic 715 -SubTopic 20 -Name Accounting Standards Codification -Section 50 -Paragraph 1 -Subparagraph (i) -Publisher FASB -URI https://asc.fasb.org//1943274/2147480506/715-20-50-1 + Details
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