Accumulated Other Comprehensive Income (Loss) (Tables)

12 Months Ended

Dec. 31, 2021

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, 2021, 2020, and 2019 respectively, including changes during the years then ended as well as any reclassifications out of accumulated other comprehensive income (loss):

($ in Thousands)	Investment Securities AFS		Defined Benefit Pension and Postretirement Obligations		Accumulated Other Comprehensive Income (Loss)
Balance, December 31, 2018	$	(75,643)	$	(49,330)	$	(124,972)
Other comprehensive income before reclassifications	111,592		16,296		127,887
Amounts reclassified from accumulated other comprehensive income (loss)
Investment securities (gains), net	(5,957)		—		(5,957)
Personnel expense	—		(148)		(148)
Other expense	—		476		476
Interest income	895		—		895
Income tax (expense)	(26,898)		(4,465)		(31,363)
Net other comprehensive income during period	79,631		12,158		91,789
Balance, December 31, 2019	$	3,989	$	(37,172)	$	(33,183)
Other comprehensive income before reclassifications	$	55,628	$	7,780	$	63,408
Amounts reclassified from accumulated other comprehensive income (loss)
Investment securities (gains), net	(9,222)		—		(9,222)
Personnel expense	—		(148)		(148)
Other expense	—		3,897		3,897
Interest income	3,359		—		3,359
Income tax (expense)	(12,429)		(3,064)		(15,493)
Net other comprehensive income during period	37,336		8,465		45,801
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
Personnel expense	—		1,346		1,346
Other expense	—		4,594		4,594
Interest income	1,551		—		1,551
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)