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ACCUMULATED OTHER COMPREHENSIVE INCOME (LOSS)
6 Months Ended
Jun. 30, 2023
Accumulated Other Comprehensive Income (Loss), Net of Tax [Abstract]  
ACCUMULATED OTHER COMPREHENSIVE INCOME (LOSS)
14. ACCUMULATED OTHER COMPREHENSIVE INCOME (LOSS)

The following tables present the components of other comprehensive income (loss) for the three and six months ended June 30, 2023 and 2022:

(dollars in thousands)Before TaxTax EffectNet of Tax
Three Months Ended June 30, 2023   
Net change in fair value of investment securities:   
Net unrealized losses on AFS investment securities arising during the period$(8,204)$(2,179)$(6,025)
Less: Amortization of unrealized losses on investment securities transferred to HTM1,976 525 1,451 
Net change in fair value of investment securities(6,228)(1,654)(4,574)
Net change in fair value of derivatives:
Net unrealized gains arising during the period2,777 737 2,040 
Net change in fair value of derivatives2,777 737 2,040 
SERPs:   
Amortization of net actuarial loss(20)(5)(15)
Amortization of net transition obligation— 
SERPs(18)(5)(13)
Other comprehensive loss$(3,469)$(922)$(2,547)
(dollars in thousands)Before TaxTax EffectNet of Tax
Three Months Ended June 30, 2022   
Net change in fair value of investment securities:   
Net unrealized losses on AFS investment securities arising during the period$(61,628)$(16,478)$(45,150)
Less: Amortization of unrealized losses on investment securities transferred to HTM1,976 528 1,448 
Net change in fair value of investment securities(59,652)(15,950)(43,702)
Net change in fair value of derivatives:
Net unrealized gains arising during the period$2,930 $783 $2,147 
Net change in fair value of derivatives2,930 783 2,147 
Defined benefit retirement plan and SERPs:   
Amortization of net actuarial loss131 35 96 
Amortization of net transition obligation
Defined benefit retirement plan and SERPs4,068 1,598 2,470 
Other comprehensive loss$(52,654)$(13,569)$(39,085)
(dollars in thousands)Before TaxTax EffectNet of Tax
Six Months Ended June 30, 2023   
Net change in fair value of investment securities:   
Net unrealized gains on AFS investment securities arising during the period$7,054 $1,873 $5,181 
Less: Amortization of unrealized losses on investment securities transferred to HTM3,644 968 2,676 
Net change in fair value of investment securities10,698 2,841 7,857 
Net change in fair value of derivatives:
Net unrealized gains arising during the period1,178 301 877 
Net change in fair value of derivatives1,178 301 877 
Defined benefit retirement plan and SERPs:  
Amortization of net actuarial loss(39)(10)(29)
Amortization of net transition obligation— 
Defined benefit retirement plan and SERPs(35)(10)(25)
Other comprehensive income$11,841 $3,132 $8,709 
(dollars in thousands)Before TaxTax EffectNet of Tax
Six Months Ended June 30, 2022   
Net change in fair value of investment securities:   
Net unrealized losses on AFS investment securities arising during the period$(170,076)$(45,476)$(124,600)
Less: Amortization of unrealized losses on investment securities transferred to HTM1,976 528 1,448 
Net change in fair value of investment securities(168,100)(44,948)(123,152)
Net change in fair value of derivatives:
Net unrealized gains arising during the period$2,880 $770 $2,110 
Net change in fair value of derivatives2,880 770 2,110 
Defined benefit retirement plan and SERPs:   
Net actuarial losses arising during the period(952)(255)(697)
Amortization of net actuarial loss264 71 193 
Amortization of net transition obligation
Settlement4,884 1,817 3,067 
Defined benefit retirement plan and SERPs4,205 1,635 2,570 
Other comprehensive loss$(161,015)$(42,543)$(118,472)
The following tables present the changes in each component of accumulated other comprehensive income (loss), net of tax ("AOCI"), for the three and six months ended June 30, 2023 and 2022:

(dollars in thousands)Investment SecuritiesDerivatives
SERPs [1]
AOCI
Three Months Ended June 30, 2023   
Balance at beginning of period$(136,678)$3,482 $468 $(132,728)
Other comprehensive income (loss) before reclassifications(6,025)2,040 — (3,985)
Reclassification adjustments from AOCI1,451 — (13)1,438 
Total other comprehensive income (loss)(4,574)2,040 (13)(2,547)
Balance at end of period$(141,252)$5,522 $455 $(135,275)

(dollars in thousands)Investment SecuritiesDerivatives
Defined Benefit Retirement Plan and SERPs [1]
AOCI
Three Months Ended June 30, 2022   
Balance at beginning of period$(83,116)$(37)$(4,194)$(87,347)
Other comprehensive income (loss) before reclassifications(45,150)2,147 (697)(43,700)
Reclassification adjustments from AOCI1,448 — 3,167 4,615 
Total other comprehensive income (loss)(43,702)2,147 2,470 (39,085)
Balance at end of period$(126,818)$2,110 $(1,724)$(126,432)

[1] During the second quarter of 2022, the Company settled all obligations related to its defined benefit retirement plan. As a result, the AOCI balance in the defined benefit retirement plan and SERPs column subsequent to June 30, 2022 relates entirely to the SERPs.
(dollars in thousands)Investment SecuritiesDerivatives
SERPs [1]
AOCI
Six Months Ended June 30, 2023   
Balance at beginning of period$(149,109)$4,645 $480 $(143,984)
Other comprehensive income before reclassifications5,181 877 — 6,058 
Reclassification adjustments from AOCI2,676 — (25)2,651 
Total other comprehensive income (loss)7,857 877 (25)8,709 
Balance at end of period$(141,252)$5,522 $455 $(135,275)

(dollars in thousands)Investment SecuritiesDerivatives
Defined Benefit Retirement Plan and SERPs [1]
AOCI
Six Months Ended June 30, 2022   
Balance at beginning of period$(3,666)$— $(4,294)$(7,960)
Other comprehensive income (loss) before reclassifications(124,600)2,110 (697)(123,187)
Reclassification adjustments from AOCI1,448 — 3,267 4,715 
Total other comprehensive income (loss)(123,152)2,110 2,570 (118,472)
Balance at end of period$(126,818)$2,110 $(1,724)$(126,432)
[1] During the second quarter of 2022, the Company settled all obligations related to its defined benefit retirement plan. As a result, the AOCI balance in the defined benefit retirement plan and SERPs column subsequent to June 30, 2022 relates entirely to the SERPs.
The following tables present the amounts reclassified out of each component of AOCI for the three and six months ended June 30, 2023 and 2022:

Amount Reclassified from AOCIAffected Line Item in the Statement Where Net Income is Presented
(dollars in thousands)Three Months Ended June 30,
Details about AOCI Components20232022
Amortization of unrealized losses on investment securities transferred to held-to-maturity:
Amortization$(1,976)$(1,976)Interest and dividends on investment securities
Tax effect525 528 Income tax expense
Net of tax$(1,451)$(1,448)
Defined benefit retirement and supplemental executive retirement plan items:   
Amortization of net actuarial gain (loss)$20 $(131)Other operating expense - other
Amortization of net transition obligation(2)(5)Other operating expense - other
Total before tax18 (5,020)
Tax effect(5)1,853 Income tax benefit (expense)
Net of tax$13 $(3,167)
Total reclassification adjustments from AOCI for the period, net of tax$(1,438)$(4,615)
Amount Reclassified from AOCIAffected Line Item in the Statement Where Net Income is Presented
(dollars in thousands)Six Months Ended June 30,
Details about AOCI Components20232022
Amortization of unrealized losses on investment securities transferred to held-to-maturity:
Amortization$(3,644)$(1,976)Interest and dividends on investment securities
Tax effect968 528 Income tax expense
Net of tax$(2,676)$(1,448)
Defined benefit retirement and supplemental executive retirement plan items:   
Amortization of net actuarial loss$39 $(264)Other operating expense - other
Amortization of net transition obligation(4)(9)Other operating expense - other
Settlement— (4,884)Other operating expense - other
Total before tax35 (5,157)
Tax effect(10)1,890 Income tax benefit (expense)
Net of tax$25 $(3,267)
Total reclassification adjustments from AOCI for the period, net of tax$(2,651)$(4,715)