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Accumulated Other Comprehensive Income (Loss) (Tables) | 12 Months Ended
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Dec. 31, 2024
Accumulated Other Comprehensive Income (Loss), Net of Tax [Abstract] |
Summary of activity in accumulated other comprehensive income (loss) | The following table summarizes the components of accumulated other comprehensive income (loss), including changes during the years presented as well as any reclassifications out of accumulated other comprehensive income (loss):
($ in thousands) | AFS Investment Securities | Cash Flow Hedge Derivatives | Defined Benefit Pension and Postretirement Obligations | Accumulated Other Comprehensive Income (Loss)
Balance, December 31, 2021 | $ | (5,266) |  | $ | — |  | $ | (5,051) |  | $ | (10,317) |
Other comprehensive (loss) before reclassifications | (250,273) |  | — |  | (51,745) |  | (302,018) |
Unrealized (losses) on AFS securities transferred to HTM securities | (67,604) |  | — |  | — |  | (67,604) |
Amounts reclassified from accumulated other comprehensive income (loss): |  |  |  |
Investment securities losses, net | 1,922 |  | — |  | — |  | 1,922 |
HTM investment securities, net, at amortized cost(a) | 9,870 |  | — |  | — |  | 9,870 |
Other assets / accrued expenses and other liabilities | — |  | 3,626 |  | — |  | 3,626 |
Interest income | — |  | (212) |  | — |  | (212) |
Personnel expense | — |  | — |  | (325) |  | (325) |
Other expense | — |  | — |  | 658 |  | 658 |
Income tax benefit (expense) | 78,159 |  | (54) |  | 13,495 |  | 91,601 |
Net other comprehensive (loss) income during period | (227,926) |  | 3,360 |  | (37,917) |  | (262,483) |
Balance, December 31, 2022 | $ | (233,192) |  | $ | 3,360 |  | $ | (42,968) |  | $ | (272,799) |
Other comprehensive income before reclassifications | $ | 41,145 |  | $ | — |  | $ | 24,091 |  | $ | 65,236 |
Amounts reclassified from accumulated other comprehensive income (loss): |  |  |  |
Investment securities losses, net | 64,940 |  | — |  | — |  | 64,940 |
HTM investment securities, net, at amortized cost(a) | 9,025 |  | — |  | — |  | 9,025 |
Other assets / accrued expenses and other liabilities | — |  | (13,254) |  | — |  | (13,254) |
Interest income | — |  | 13,930 |  | — |  | 13,930 |
Personnel expense | — |  | — |  | (326) |  | (326) |
Other expense | — |  | — |  | (29) |  | (29) |
Income tax (expense) | (30,560) |  | (956) |  | (6,304) |  | (37,820) |
Net other comprehensive income (loss) during period | 84,550 |  | (280) |  | 17,432 |  | 101,703 |
Balance, December 31, 2023 | $ | (148,641) |  | $ | 3,080 |  | $ | (25,535) |  | $ | (171,096) |
Other comprehensive (loss) income before reclassifications | $ | (23,978) |  | $ | — |  | $ | 2,210 |  | $ | (21,768) |
Amounts reclassified from accumulated other comprehensive income (loss): |  |  |  |
Investment securities losses, net | 148,380 |  | — |  | — |  | 148,380 |
HTM investment securities, net, at amortized cost(a) | 8,360 |  | — |  | — |  | 8,360 |
Other assets / accrued expenses and other liabilities | — |  | (21,537) |  | — |  | (21,537) |
Interest income | — |  | 16,478 |  | — |  | 16,478 |
Personnel expense | — |  | — |  | (290) |  | (290) |
Other expense | — |  | — |  | (28) |  | (28) |
Income tax (expense) benefit | (33,114) |  | 710 |  | (511) |  | (32,915) |
Net other comprehensive income (loss) during period | 99,648 |  | (4,348) |  | 1,381 |  | 96,681 |
Balance, December 31, 2024 | $ | (48,993) |  | $ | (1,268) |  | $ | (24,154) |  | $ | (74,416) |

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