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Reclassification of Accumulated Other Comprehensive Income (Details) - USD ($) $ in Thousands | 3 Months Ended | 9 Months Ended |  |  |  |
--- | --- | --- | --- | --- | --- | ---
Sep. 30, 2023 | Sep. 30, 2022 | Sep. 30, 2023 | Sep. 30, 2022 | Jun. 30, 2023 | Dec. 31, 2022 | Jun. 30, 2022 | Dec. 31, 2021
Supplemental Comprehensive Income Disclosures [Abstract] |  |  |  |  |  |  |  |
Unrealized holding gains on securities arising during the period | $ (21,389) | $ (46,213) | $ (25,150) | $ (135,258) |  |  |  |
Reclassification adjustment for gains on securities included in net income | 103 | 0 | 103 | (2) |  |  |  |
Total unrealized gains on securities | (21,286) | (46,213) | (25,047) | (135,260) |  |  |  |
Unrealized holding gains on securities arising during the period | 4,138 | 9,705 | 5,282 | 28,405 |  |  |  |
Reclassification adjustment for gains on securities included in net income | (22) | 0 | (22) | 0 |  |  |  |
Other Comprehensive Income (Loss), Securities, Available-for-sale, Tax | 4,116 | 9,705 | 5,260 | 28,405 |  |  |  |
Total other comprehensive (loss) income | (19,175) | (57,296) | (20,711) | (169,014) |  |  |  |
Other Comprehensive Income (Loss), Tax | 3,672 | 12,032 | 4,349 | 35,493 |  |  |  |
Other comprehensive income (loss) before reclassification adjustment | (17,251) | (36,508) | (19,868) | (106,853) |  |  |  |
Reclassification adjustment for gains on securities included in net income | (81) | 0 | (81) | 2 |  |  |  |
Total unrealized (losses) gains on securities | (17,170) | (36,508) | (19,787) | (106,855) |  |  |  |
Total other comprehensive (loss) income | (15,503) | (45,264) | (16,362) | (133,521) |  |  |  |
Accumulated Other Comprehensive Income (Loss) [Line Items] |  |  |  |  |  |  |  |
Accumulated Other Comprehensive Income (Loss), Net of Tax | (154,054) | (142,289) | (154,054) | (142,289) | $ (138,551) | $ (137,692) | $ (97,025) | $ (8,768)
Other comprehensive income (loss) before reclassification adjustment | (17,251) | (36,508) | (19,868) | (106,853) |  |  |  |
Other Comprehensive Income (Loss), before Reclassifications, Net of Tax | (15,584) | (45,264) | (16,443) | (133,519) |  |  |  |
Amounts reclassified from accumulated other comprehensive income (loss) | 81 | 0 | 81 | (2) |  |  |  |
Total other comprehensive (loss) income | (15,503) | (45,264) | (16,362) | (133,521) |  |  |  |
Unrealized holding losses on securities arising during the period | (21,389) | (46,213) | (25,150) | (135,258) |  |  |  |
Unrealized holding gains on securities arising during the period | 4,138 | 9,705 | 5,282 | 28,405 |  |  |  |
Other Comprehensive Income (Loss), Reclassification Adjustment from AOCI for Sale of Securities, before Tax | (103) | 0 | (103) | 2 |  |  |  |
Other Comprehensive Income (Loss), Reclassification Adjustment from AOCI for Sale of Securities, Tax | 22 | 0 | 22 | 0 |  |  |  |
Reclassification adjustment for gains on securities included in net income | (81) | 0 | (81) | 2 |  |  |  |
Other Comprehensive Income (Loss), Securities, Available-for-sale, Adjustment, before Tax | (21,286) | (46,213) | (25,047) | (135,260) |  |  |  |
Other Comprehensive Income (Loss), Securities, Available-for-sale, Tax | 4,116 | 9,705 | 5,260 | 28,405 |  |  |  |
Other Comprehensive Income (Loss), Securities, Available-for-sale, Adjustment, after Tax | (17,170) | (36,508) | (19,787) | (106,855) |  |  |  |
Other Comprehensive Income (Loss), Cash Flow Hedge, Gain (Loss), before Reclassification, Tax | (444) | 2,327 | (911) | 7,088 |  |  |  |
Other Comprehensive Income (Loss), Cash Flow Hedge, Gain (Loss), before Reclassification and Tax | 2,111 | (11,083) | 4,336 | (33,754) |  |  |  |
Other Comprehensive Income (Loss), Cash Flow Hedge, Gain (Loss), after Reclassification and Tax | 1,667 | (8,756) | 3,425 | (26,666) |  |  |  |
Other Comprehensive Income (Loss), Cash Flow Hedge, Gain (Loss), after Reclassification, Tax | (444) | 2,327 | (911) | 7,088 |  |  |  |
Other Comprehensive Income (Loss), Cash Flow Hedge, Gain (Loss), after Reclassification, before Tax | 2,111 | (11,083) | 4,336 | (33,754) |  |  |  |
Other Comprehensive Income (Loss), before Tax | (19,175) | (57,296) | (20,711) | (169,014) |  |  |  |
Other Comprehensive Income (Loss), Tax | 3,672 | 12,032 | 4,349 | 35,493 |  |  |  |
Accumulated Net Unrealized Investment Gain (Loss) [Member] |  |  |  |  |  |  |  |
Supplemental Comprehensive Income Disclosures [Abstract] |  |  |  |  |  |  |  |
Total other comprehensive (loss) income | (17,170) | (36,508) | (19,787) | (106,855) |  |  |  |
Accumulated Other Comprehensive Income (Loss) [Line Items] |  |  |  |  |  |  |  |
Accumulated Other Comprehensive Income (Loss), Net of Tax | (127,258) | (110,172) | (127,258) | (110,172) | (110,088) | (107,471) | (73,664) | (3,317)
Other Comprehensive Income (Loss), before Reclassifications, Net of Tax | (17,251) | (36,508) | (19,868) | (106,853) |  |  |  |
Amounts reclassified from accumulated other comprehensive income (loss) | 81 | 0 | 81 | (2) |  |  |  |
Total other comprehensive (loss) income | (17,170) | (36,508) | (19,787) | (106,855) |  |  |  |
Accumulated Defined Benefit Plans Adjustment [Member] |  |  |  |  |  |  |  |
Supplemental Comprehensive Income Disclosures [Abstract] |  |  |  |  |  |  |  |
Total other comprehensive (loss) income | 0 | 0 | 0 | 0 |  |  |  |
Accumulated Other Comprehensive Income (Loss) [Line Items] |  |  |  |  |  |  |  |
Accumulated Other Comprehensive Income (Loss), Net of Tax | 268 | 95 | 268 | 95 | 268 | 268 | 95 | 95
Other Comprehensive Income (Loss), before Reclassifications, Net of Tax | 0 | 0 | 0 | 0 |  |  |  |
Amounts reclassified from accumulated other comprehensive income (loss) | 0 | 0 | 0 | 0 |  |  |  |
Total other comprehensive (loss) income | 0 | 0 | 0 | 0 |  |  |  |
Derivative [Member] |  |  |  |  |  |  |  |
Supplemental Comprehensive Income Disclosures [Abstract] |  |  |  |  |  |  |  |
Total other comprehensive (loss) income | 1,667 | (8,756) | 3,425 | (26,666) |  |  |  |
Accumulated Other Comprehensive Income (Loss) [Line Items] |  |  |  |  |  |  |  |
Accumulated Other Comprehensive Income (Loss), Net of Tax | (27,064) | (32,212) | (27,064) | (32,212) | $ (28,731) | $ (30,489) | $ (23,456) | $ (5,546)
Other Comprehensive Income (Loss), before Reclassifications, Net of Tax | 1,667 | (8,756) |  |  |  |  |  |
Amounts reclassified from accumulated other comprehensive income (loss) | 0 | 0 | 0 | 0 |  |  |  |
Total other comprehensive (loss) income | 1,667 | (8,756) | 3,425 | (26,666) |  |  |  |
Other Comprehensive Income (Loss), Cash Flow Hedge, Gain (Loss), after Reclassification and Tax | 1,667 | (8,756) | 3,425 | (26,666) |  |  |  |
Accumulated Other Comprehensive Income (Loss), net [Member] |  |  |  |  |  |  |  |
Supplemental Comprehensive Income Disclosures [Abstract] |  |  |  |  |  |  |  |
Total other comprehensive (loss) income | (15,503) | (45,264) | (16,362) | (133,521) |  |  |  |
Accumulated Other Comprehensive Income (Loss) [Line Items] |  |  |  |  |  |  |  |
Total other comprehensive (loss) income | $ (15,503) | $ (45,264) | $ (16,362) | $ (133,521) |  |  |  |

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