Accumulated Other Comprehensive Income (Loss) (Tables)

3 Months Ended

Mar. 31, 2023

Accumulated Other Comprehensive Income (Loss)

Schedule of changes in accumulated other comprehensive income (loss)

			Income
			Tax
	Pre-tax		Benefit		Net of
(dollars in thousands)	Amount		(Expense)		Tax
Accumulated other comprehensive loss at December 31, 2022	$	(871,813)	$	232,559	$	(639,254)
Three months ended March 31, 2023
Investment securities:
Unrealized net gains arising during the period		25,038		(6,679)		18,359
Reclassification of net losses to net income:
Amortization of unrealized holding losses on held-to-maturity securities		11,708		(3,123)		8,585
Net change in investment securities		36,746		(9,802)		26,944
Cash flow derivative hedges:
Unrealized net losses arising during the period		(442)		118		(324)
Reclassification of net losses included in net income		1,303		(348)		955
Net change in cash flow derivative hedges		861		(230)		631
Other comprehensive income		37,607		(10,032)		27,575
Accumulated other comprehensive loss at March 31, 2023	$	(834,206)	$	222,527	$	(611,679)

			Income
	Pre-tax		Tax		Net of
(dollars in thousands)	Amount		Benefit		Tax
Accumulated other comprehensive loss at December 31, 2021	$	(165,967)	$	44,274	$	(121,693)
Three months ended March 31, 2022
Investment securities:
Unrealized net losses arising during the period		(538,085)		143,534		(394,551)
Net change in investment securities		(538,085)		143,534		(394,551)
Cash flow derivative hedges:
Unrealized net losses arising during the period		(1,716)		458		(1,258)
Net change in cash flow derivative hedges		(1,716)		458		(1,258)
Other comprehensive loss		(539,801)		143,992		(395,809)
Accumulated other comprehensive loss at March 31, 2022	$	(705,768)	$	188,266	$	(517,502)

Summary of changes in accumulated other comprehensive income (loss), net of tax

	Pensions								Accumulated
	and		Available-for-Sale		Held-to-Maturity		Cash Flow		Other
	Other		Investment		Investment		Derivative		Comprehensive
(dollars in thousands)	Benefits		Securities		Securities		Hedges		Income (Loss)
Three Months Ended March 31, 2023
Balance at beginning of period	$	(5,431)	$	(292,175)	$	(336,946)	$	(4,702)	$	(639,254)
Other comprehensive income		—		18,359		8,585		631		27,575
Balance at end of period	$	(5,431)	$	(273,816)	$	(328,361)	$	(4,071)	$	(611,679)
Three Months Ended March 31, 2022
Balance at beginning of period	$	(24,390)	$	(97,303)	$	—	$	—	$	(121,693)
Other comprehensive loss		—		(394,551)		—		(1,258)		(395,809)
Balance at end of period	$	(24,390)	$	(491,854)	$	—	$	(1,258)	$	(517,502)