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Accumulated Other Comprehensive Income (Loss)
 12 Months Ended
Dec. 31, 2024
Accumulated Other Comprehensive Income (Loss), Net of Tax [Abstract]  
Accumulated Other Comprehensive Income (Loss) 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 SecuritiesCash Flow Hedge DerivativesDefined 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, net1,922 — — 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 $65,236 
Amounts reclassified from accumulated other comprehensive income (loss):
Investment securities losses, net64,940 — — 64,940 
HTM investment securities, net, at amortized cost(a)
9,025 — — 9,025 
Other assets / accrued expenses and other liabilities— (13,254)— (13,254)
Interest income— 13,930 — 13,930 
Personnel expense— — (326)(326)
Other expense— — (29)(29)
Income tax (expense)(30,560)(956)(6,304)(37,820)
Net other comprehensive income (loss) during period84,550 (280)17,432 101,703 
Balance, December 31, 2023$(148,641)$3,080 $(25,535)$(171,096)
Other comprehensive (loss) income before reclassifications$(23,978)$— $2,210 $(21,768)
Amounts reclassified from accumulated other comprehensive income (loss):
Investment securities losses, net148,380 — — 148,380 
HTM investment securities, net, at amortized cost(a)
8,360 — — 8,360 
Other assets / accrued expenses and other liabilities— (21,537)— (21,537)
Interest income— 16,478 — 16,478 
Personnel expense— — (290)(290)
Other expense— — (28)(28)
Income tax (expense) benefit(33,114)710 (511)(32,915)
Net other comprehensive income (loss) during period99,648 (4,348)1,381 96,681 
Balance, December 31, 2024$(48,993)$(1,268)$(24,154)$(74,416)

(a) Amortization of net unrealized losses on AFS securities transferred to HTM securities.