CHANGE IN ACCUMULATED OTHER COMPREHENSIVE LOSS (Tables)

12 Months Ended

Dec. 31, 2024

Equity [Abstract]

Schedule of Components of Accumulated Other Comprehensive Loss

Changes to accumulated other comprehensive loss by component are shown net of taxes in the following tables for the period indicated:

(Dollars in thousands)	Net change in investment securities available for sale		Net change in investment securities held to maturity		Net change in defined benefit plan		Net change in fair value of derivatives used for cash flow hedges(1)		Net change in equity method investments		Total
Balance, December 31, 2021	$	(33,873)	$	175	$	(4,691)	$	268	$	353	$	(37,768)
Other comprehensive (loss) income before reclassifications(2)	(529,660)		(119,769)		318		—		213		(648,898)
Less: Amounts reclassified from accumulated other comprehensive income (loss)	—		11,091		(109)		(160)		—		10,822
Net current-period other comprehensive (loss) income	(529,660)		(108,678)		209		(160)		213		(638,076)
Balance, December 31, 2022	$	(563,533)	$	(108,503)	$	(4,482)	$	108	566		$	(675,844)
Other comprehensive income (loss) before reclassifications	63,601		—		132		1,596		(85)		65,244
Less: Amounts reclassified from accumulated other comprehensive income (loss)	—		16,980		(264)		(107)		—		16,609
Net current-period other comprehensive income (loss)	63,601		16,980		(132)		1,489		(85)		81,853
Balance, December 31, 2023	$	(499,932)	$	(91,523)	$	(4,614)	$	1,597	$	481	$	(593,991)
Other comprehensive (loss) income before reclassifications	(37,857)		—		991		(8,894)		(52)		(45,812)
Less: Amounts reclassified from accumulated other comprehensive income (loss)	—		15,118		(192)		—		—		14,926
Net current-period other comprehensive (loss) income	(37,857)		15,118		799		(8,894)		(52)		(30,886)
Balance, December 31, 2024	$	(537,789)	$	(76,405)	$	(3,815)	$	(7,297)	$	429	$	(624,877)

(1)Includes amortization of net gain for cash flow hedges terminated as of April 1, 2020.

(2)Includes $119.8 million, net of tax, of unrealized losses on transferred investment securities from available-for-sale to held-to-maturity.

Schedule of Components of Other Comprehensive Income (Loss)

Components of other comprehensive income (loss) that impact the Consolidated Statements of Income are presented in the table below.

	Twelve Months Ended December 31,						Affected line item in Consolidated Statements of Income
(Dollars in thousands)	2024		2023		2022
Net unrealized holding losses on securities transferred between available-for-sale and held-to-maturity:
Amortization of net unrealized losses to income during the period	$	19,892	$	22,343	$	14,593	Net interest income
Income taxes	(4,774)		(5,363)		(3,502)		Income tax provision
Net of tax	$	15,118	$	16,980	$	11,091
Amortization of defined benefit pension plan-related items:
Prior service credits	$	(76)	$	(76)	$	(76)
Actuarial gains	(176)		(271)		(68)
Total before tax	$	(252)	$	(347)	$	(144)	Salaries, benefits and other compensation
Income taxes	60		83		35		Income tax provision
Net of tax	$	(192)	$	(264)	$	(109)
Net unrealized gains on terminated cash flow hedges:
Amortization of net unrealized gains to income during the period	$	—	$	(141)	$	(211)	Interest and fees on loans and leases
Income taxes	—		34		51		Income tax provision
Net of tax	$	—	$	(107)	$	(160)
Total reclassifications	$	14,926	$	16,609	$	10,822