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Other Comprehensive Income (Tables)
12 Months Ended
Dec. 31, 2023
Equity [Abstract]  
Schedule of Components of Other Comprehensive Income and Related Tax Effects
Other comprehensive income components and related tax effects were as follows for the years ended December 31, 2023, 2022, and 2021:

December 31, 2023December 31, 2022December 31, 2021
Unrealized holding gains (losses) on available-for-sale securities$7,785 $(67,167)$(19,526)
Less reclassification adjustment for gains recognized in earnings(52)(651)(783)
Net unrealized gains (losses)7,733 (67,818)(20,309)
Tax effect(1,624)14,242 4,265 
Net-of-tax amount6,109 (53,576)(16,044)
Amortization of unrealized gains from held-to-maturity securities748 1,107 — 
Tax effect(157)(232)— 
Net-of-tax amount591 875 — 
Actuarial gains (losses) on postemployment health care plan(2)303 391 
Net amortization of transition obligation and actuarial gain(174)(113)(43)
Net unrealized gains (losses) on postemployment health care plan(176)190 348 
Tax effect37 (40)(73)
Net-of-tax amount(139)150 275 
Unrealized gains on interest rate swap— 411 105 
Less reclassification adjustment for gains (losses) recognized in earnings(151)127 276 
Net unrealized gains (losses)(151)538 381 
Tax effect32 (113)(80)
Net-of-tax amount(119)425 301 
Other comprehensive income (loss)$6,442 $(52,126)$(15,468)
Schedule of Change in Accumulated Other Comprehensive Income (Loss)
The following is a summary of the change in the accumulated other comprehensive income (loss) balance, net of tax, for the years ended December 31, 2023, 2022, and 2021.

Balance
December 31, 2022
Comprehensive
Income (Loss)
Balance
December 31, 2023
Unrealized gains on securities available-for-sale$(54,282)$6,109 $(48,173)
Amortization of unrealized gains from held-to-maturity securities875 591 1,466 
Unrealized gains (losses) on postretirement benefits plan768 (139)629 
Unrealized gains (losses) on interest rate swap119 (119)— 
Total$(52,520)$6,442 $(46,078)

Balance
December 31, 2021
Comprehensive
Income (Loss)
Balance
December 31, 2022
Unrealized losses on securities available-for-sale$(706)$(53,576)$(54,282)
Amortization of unrealized gains from held-to-maturity securities— 875 875 
Unrealized gains on postretirement benefits plan618 150 768 
Unrealized gains (losses) on interest rate swap(306)425 119 
Total$(394)$(52,126)$(52,520)
 
Balance
January 1, 2021
Comprehensive
Income (Loss)
Balance
December 31, 2021
Unrealized gains (losses) on securities available-for-sale$15,338 $(16,044)$(706)
Unrealized gains on postretirement benefits plan343 275 618 
Unrealized gains (losses) on interest rate swap(607)301 (306)
Total$15,074 $(15,468)$(394)