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v3.23.3

Other Comprehensive Income (Loss) - Changes in the Components of Other Comprehensive Income (Loss), Net of Tax (Details) - USD ($) $ in Thousands | 3 Months Ended | 9 Months Ended
--- | --- | ---
Sep. 30, 2023 | Jun. 30, 2023 | Mar. 31, 2023 | Sep. 30, 2022 | Jun. 30, 2022 | Mar. 31, 2022 | Sep. 30, 2023 | Sep. 30, 2022
Accumulated Other Comprehensive Income (Loss) [Line Items] |  |  |  |  |  |  |  |
Total other comprehensive income (loss), pre-tax | $ (10,430) |  |  | $ (81,360) |  |  | $ 13,001 | $ (275,800)
Total other comprehensive income (loss), tax expense (benefit) | (2,567) |  |  | (20,706) |  |  | 3,288 | (70,191)
Other comprehensive (loss) income, net of tax | (7,863) | $ 863 | $ 16,713 | (60,654) | $ (50,829) | $ (94,126) | 9,713 | (205,609)
Securities available for sale: |  |  |  |  |  |  |  |
Accumulated Other Comprehensive Income (Loss) [Line Items] |  |  |  |  |  |  |  |
Other comprehensive income (loss), before reclassifications, pre-tax | (17,175) |  |  | (85,283) |  |  | (17,744) | (296,444)
Other comprehensive income (loss) before reclassifications, tax expense (benefit) | (4,292) |  |  | (21,704) |  |  | (4,462) | (75,445)
Other comprehensive income (loss), before reclassifications, net of tax | (12,883) |  |  | (63,579) |  |  | (13,282) | (220,999)
Amortization of unrealized holding losses on securities transferred to held to maturity category, pre tax | 3,959 |  |  | 1,619 |  |  | 10,113 | 1,300
Amortization of unrealized holding losses on securities transferred to held to maturity category, tax expense (benefit) | 1,012 |  |  | 412 |  |  | 2,586 | 331
Amortization of unrealized holding losses on securities transferred to held to maturity category, net of tax | 2,947 |  |  | 1,207 |  |  | 7,527 | 969
Reclassification from AOCI, pre-tax |  |  |  |  |  |  | 22,438 |
Reclassification from AOCI, tax expense (benefit) |  |  |  |  |  |  | 5,622 |
Reclassification from AOCI, net of tax |  |  |  |  |  |  | 16,816 |
Total other comprehensive income (loss), pre-tax | (13,216) |  |  | (83,664) |  |  | 14,807 | (295,144)
Total other comprehensive income (loss), tax expense (benefit) | (3,280) |  |  | (21,292) |  |  | 3,746 | (75,114)
Other comprehensive (loss) income, net of tax | (9,936) |  |  | (62,372) |  |  | 11,061 | (220,030)
Derivative instruments: |  |  |  |  |  |  |  |
Accumulated Other Comprehensive Income (Loss) [Line Items] |  |  |  |  |  |  |  |
Other comprehensive income (loss), before reclassifications, pre-tax | 2,670 |  |  | 2,262 |  |  | (2,153) | 19,219
Other comprehensive income (loss) before reclassifications, tax expense (benefit) | 683 |  |  | 575 |  |  | (547) | 4,891
Other comprehensive income (loss), before reclassifications, net of tax | 1,987 |  |  | 1,687 |  |  | (1,606) | 14,328
Total other comprehensive income (loss), pre-tax | 2,670 |  |  | 2,262 |  |  | (2,153) | 19,219
Total other comprehensive income (loss), tax expense (benefit) | 683 |  |  | 575 |  |  | (547) | 4,891
Other comprehensive (loss) income, net of tax | 1,987 |  |  | 1,687 |  |  | (1,606) | 14,328
Amortization of net actuarial loss recognized in net periodic pension cost |  |  |  |  |  |  |  |
Accumulated Other Comprehensive Income (Loss) [Line Items] |  |  |  |  |  |  |  |
Reclassification from AOCI, pre-tax | 116 |  |  | 42 |  |  | 347 | 125
Reclassification from AOCI, tax expense (benefit) | 30 |  |  | 11 |  |  | 89 | 32
Reclassification from AOCI, net of tax | 86 |  |  | 31 |  |  | 258 | 93
Total defined benefit pension and post-retirement benefit plans |  |  |  |  |  |  |  |
Accumulated Other Comprehensive Income (Loss) [Line Items] |  |  |  |  |  |  |  |
Total other comprehensive income (loss), pre-tax | 116 |  |  | 42 |  |  | 347 | 125
Total other comprehensive income (loss), tax expense (benefit) | 30 |  |  | 11 |  |  | 89 | 32
Other comprehensive (loss) income, net of tax | $ 86 |  |  | $ 31 |  |  | $ 258 | $ 93

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