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ACCUMULATED OTHER COMPREHENSIVE INCOME (LOSS) (Tables)
3 Months Ended
Mar. 31, 2024
Accumulated Other Comprehensive Income (Loss), Net of Tax [Abstract]  
Schedule of components of other comprehensive income (loss)
The following tables present the components of other comprehensive income (loss) for the periods presented:

(dollars in thousands)Before TaxTax EffectNet of Tax
Three Months Ended March 31, 2024   
Net change in fair value of investment securities:   
Net unrealized losses on AFS investment securities arising during the period$(7,035)$(1,855)$(5,180)
Less: Amortization of unrealized losses on investment securities transferred to HTM1,638 432 1,206 
Net change in fair value of investment securities(5,397)(1,423)(3,974)
Net change in fair value of derivatives:
Net unrealized gains arising during the period3,053 806 2,247 
Net change in fair value of derivatives3,053 806 2,247 
Other comprehensive loss$(2,344)$(617)$(1,727)
(dollars in thousands)Before TaxTax EffectNet of Tax
Three Months Ended March 31, 2023   
Net change in fair value of investment securities:   
Net unrealized gains on AFS investment securities arising during the period$15,258 $4,052 $11,206 
Less: Amortization of unrealized losses on investment securities transferred to HTM1,668 443 1,225 
Net change in fair value of investment securities16,926 4,495 12,431 
Net change in fair value of derivatives:
Net unrealized losses arising during the period(1,599)(436)(1,163)
Net change in fair value of derivatives(1,599)(436)(1,163)
SERP:   
Amortization of net actuarial gain(19)(5)(14)
Amortization of net transition obligation— 
SERP(17)(5)(12)
Other comprehensive income$15,310 $4,054 $11,256 
Schedule of changes in each component of AOCI, net of tax
The following tables present the changes in each component of accumulated other comprehensive income (loss), net of tax, for the periods presented:

(dollars in thousands)Investment SecuritiesDerivativesSERPAOCI
Three Months Ended March 31, 2024   
Balance at beginning of period$(127,922)$5,029 $297 $(122,596)
Other comprehensive income (loss) before reclassifications(5,180)2,247 — (2,933)
Reclassification adjustments from AOCI1,206 — — 1,206 
Total other comprehensive income (loss)(3,974)2,247 — (1,727)
Balance at end of period$(131,896)$7,276 $297 $(124,323)

(dollars in thousands)Investment SecuritiesDerivativesSERPAOCI
Three Months Ended March 31, 2023   
Balance at beginning of period$(149,109)$4,645 $480 $(143,984)
Other comprehensive income (loss) before reclassifications11,206 (1,163)— 10,043 
Reclassification adjustments from AOCI1,225 — (12)1,213 
Total other comprehensive income (loss)12,431 (1,163)(12)11,256 
Balance at end of period$(136,678)$3,482 $468 $(132,728)
Schedule of amounts reclassified out of each component of AOCI
The following tables present the amounts reclassified out of each component of AOCI for the periods presented:

Amount Reclassified from AOCIAffected Line Item in the Statement Where Net Income is Presented
(dollars in thousands)Three Months Ended March 31,
Details about AOCI Components20242023
Amortization of unrealized losses on investment securities transferred to HTM:
Amortization$(1,638)$(1,668)Interest and dividends on investment securities
Tax effect432 443 Income tax benefit
Net of tax(1,206)(1,225)
SERP:   
Amortization of net actuarial gain— 19 Other operating expense - other
Amortization of net transition obligation— (2)Other operating expense - other
Total before tax— 17 
Tax effect— (5)Income tax expense
Net of tax— 12 
Total reclassification adjustments from AOCI for the period, net of tax$(1,206)$(1,213)