ACCUMULATED OTHER COMPREHENSIVE INCOME (LOSS) (Tables)

9 Months Ended

Sep. 30, 2023

Equity [Abstract]

Related Tax Effects Allocated to Other Comprehensive Income and Accumulated Other Comprehensive Income (Loss)

The following table summarizes the changes within each classification of AOCI:

	Three months ended September 30, 2023
	Total other comprehensive income (loss)										Total accumulated other comprehensive income (loss)
(Dollars in thousands)	Prior to reclass		Reclass from		Pre-tax		Tax effect		Net of tax		Beginning balance		Net activity		Ending balance
Unrealized gain (loss) on debt securities	$	(71,051)	$	(4)	$	(71,047)	$	15,650	$	(55,397)	$	(320,336)	$	(55,397)	$	(375,733)
Unrealized gain (loss) on derivatives	(2,014)		(71)		(1,943)		450		(1,493)		(331)		(1,493)		(1,824)
Retirement obligation	0		(213)		213		(49)		164		(31,776)		164		(31,612)
Foreign currency translation	(269)		0		(269)		0		(269)		(567)		(269)		(836)
Total	$	(73,334)	$	(288)	$	(73,046)	$	16,051	$	(56,995)	$	(353,010)	$	(56,995)	$	(410,005)
	Three months ended September 30, 2022
	Total other comprehensive income (loss)										Total accumulated other comprehensive income (loss)
(Dollars in thousands)	Prior to reclass		Reclass from		Pre-tax		Tax effect		Net of tax		Beginning balance		Net activity		Ending balance
Unrealized gain (loss) on debt securities	$	(142,733)	$	179	$	(142,912)	$	31,479	$	(111,433)	$	(222,441)	$	(111,433)	$	(333,874)
Retirement obligation	0		(340)		340		(79)		261		(20,246)		261		(19,985)
Foreign currency translation	(70)		0		(70)		0		(70)		(641)		(70)		(711)
Total	$	(142,803)	$	(161)	$	(142,642)	$	31,400	$	(111,242)	$	(243,328)	$	(111,242)	$	(354,570)

	Nine months ended September 30, 2023
	Total other comprehensive income (loss)										Total accumulated other comprehensive income (loss)
(Dollars in thousands)	Prior to reclass		Reclass from		Pre-tax		Tax effect		Net of tax		Beginning balance		Net activity		Ending balance
Unrealized gain (loss) on debt securities	$	(64,285)	$	(407)	$	(63,878)	$	14,070	$	(49,808)	$	(325,925)	$	(49,808)	$	(375,733)
Unrealized gain (loss) on derivatives	(2,445)		(72)		(2,373)		549		(1,824)		0		(1,824)		(1,824)
Retirement obligation	0		(534)		534		(123)		411		(32,023)		411		(31,612)
Foreign currency translation	(121)		0		(121)		0		(121)		(715)		(121)		(836)
Total	$	(66,851)	$	(1,013)	$	(65,838)	$	14,496	$	(51,342)	$	(358,663)	$	(51,342)	$	(410,005)

	Nine months ended September 30, 2022
	Total other comprehensive income (loss)										Total accumulated other comprehensive income (loss)
(Dollars in thousands)	Prior to reclass		Reclass from		Pre-tax		Tax effect		Net of tax		Beginning balance		Net activity		Ending balance
Unrealized gain (loss) on debt securities	$	(454,844)	$	176	$	(455,020)	$	100,108	$	(354,912)	$	21,038	$	(354,912)	$	(333,874)
Retirement obligation	0		(995)		995		(134)		861		(20,846)		861		(19,985)
Foreign currency translation	(86)		0		(86)		0		(86)		(625)		(86)		(711)
Total	$	(454,930)	$	(819)	$	(454,111)	$	99,974	$	(354,137)	$	(433)	$	(354,137)	$	(354,570)

Other Accumulated Comprehensive income reclassified from AOCI

The following table presents the activity reclassified from accumulated other comprehensive income into income during the three and nine month periods ended September 30, 2023 and 2022, respectively:

	Amount reclassified from accumulated other comprehensive income (loss)
	Three months ended				Nine months ended
	September 30,				September 30,
(Dollars in thousands)	2023		2022		2023		2022		Affected Line Item in the Consolidated Statements of Income
Gains and losses on cash flow hedges
Interest rate contracts	$	(71)	$	0	$	(72)	$	0	Interest income - Loans and leases, including fees
Realized gain (loss) on securities available-for-sale	$	(4)	$	179	$	(407)	$	176	Net gain (loss) on sales of investments securities
Defined benefit pension plan
Amortization of prior service cost (1)	(5)		76		(6)		226		Other noninterest expense
Recognized net actuarial loss (1)	(208)		(416)		(528)		(1,221)		Other noninterest expense
Defined benefit pension plan total	(213)		(340)		(534)		(995)
Total reclassifications for the period, before tax	$	(288)	$	(161)	$	(1,013)	$	(819)

(1) Included in the computation of net periodic pension cost (see Note 14 - Employee Benefit Plans for additional details).