Accumulated Other Comprehensive Income (Loss) (Tables)

12 Months Ended

Dec. 31, 2023

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) at December 31, 2023, 2022, and 2021, respectively, including changes during the years then ended 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, 2020	$	41,325	$	—	$	(28,707)	$	12,618
Other comprehensive income (loss) before reclassifications	(63,714)		—		25,519		(38,195)
Amounts reclassified from accumulated other comprehensive income (loss):
Investment securities losses, net	16		—		—		16
HTM investment securities, net, at amortized cost(a)	1,551		—		—		1,551
Personnel expense	—		—		1,346		1,346
Other expense	—		—		4,594		4,594
Income tax (expense) benefit	15,557		—		(7,803)		7,754
Net other comprehensive income (loss) during period	(46,591)		—		23,656		(22,935)
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 (expense) benefit	78,159		(54)		13,495		91,601
Net other comprehensive income (loss) 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)