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Other Comprehensive Income (Loss)
9 Months Ended
Sep. 30, 2023
Equity [Abstract]  
Other Comprehensive Income (Loss) Other Comprehensive Income (Loss)
The tables below summarize the changes in accumulated other comprehensive income (loss) by component for the three and nine months ended September 30, 2023 and 2022, net of tax:
September 30, 2023Unrealized Gains and Losses on Available-for-Sale SecuritiesPostretirement Benefit ItemsTotal
Beginning Balance at July 1, 2023$(248,338)$(514)$(248,852)
Other Comprehensive Income (Loss) Before Reclassification(78,761)— (78,761)
Amounts Reclassified from Accumulated Other Comprehensive Income (Loss)— — — 
Net Current Period Other Comprehensive Income (Loss)(78,761)— (78,761)
Ending Balance at September 30, 2023$(327,099)$(514)$(327,613)

September 30, 2023Unrealized Gains and Losses on Available-for-Sale SecuritiesPostretirement Benefit ItemsTotal
Beginning Balance at January 1, 2023$(262,924)$(514)$(263,438)
Other Comprehensive Income (Loss) Before Reclassification(64,143)— (64,143)
Amounts Reclassified from Accumulated Other Comprehensive Income (Loss)(32)— (32)
Net Current Period Other Comprehensive Income (Loss)(64,175)— (64,175)
Ending Balance at September 30, 2023$(327,099)$(514)$(327,613)

September 30, 2022Unrealized Gains and Losses on Available-for-Sale SecuritiesPostretirement Benefit ItemsTotal
Beginning Balance at July 1, 2022$(210,527)$(568)$(211,095)
Other Comprehensive Income (Loss) Before Reclassification(97,945)— (97,945)
Amounts Reclassified from Accumulated Other Comprehensive Income (Loss)(18)— (18)
Net Current Period Other Comprehensive Income (Loss)(97,963)— (97,963)
Ending Balance at September 30, 2022$(308,490)$(568)$(309,058)
September 30, 2022Unrealized Gains and Losses on Available-for-Sale SecuritiesPostretirement Benefit ItemsTotal
Beginning Balance at January 1, 2022$16,052 $(568)$15,484 
Other Comprehensive Income (Loss) Before Reclassification(324,168)— (324,168)
Amounts Reclassified from Accumulated Other Comprehensive Income (Loss)(374)— (374)
Net Current Period Other Comprehensive Income (Loss)(324,542)— (324,542)
Ending Balance at September 30, 2022$(308,490)$(568)$(309,058)

The tables below summarize the classifications out of accumulated other comprehensive income (loss) by component for the three and nine months ended September 30, 2023 and 2022:
Details about Accumulated Other Comprehensive Income (Loss) ComponentsAmount Reclassified From Accumulated Other Comprehensive Income (Loss)Affected Line Item in the Statement Where Net Income is Presented
Unrealized Gains and Losses on
    Available-for-Sale Securities
$— Net Gains on Securities
— Income Tax Expense
— Net of Tax
Total Reclassifications for the Three
    Months Ended September 30, 2023
$— 

Details about Accumulated Other Comprehensive Income (Loss) ComponentsAmount Reclassified From Accumulated Other Comprehensive Income (Loss)Affected Line Item in the Statement Where Net Income is Presented
Unrealized Gains and Losses on
    Available-for-Sale Securities
$40 Net Gains on Securities
(8)Income Tax Expense
32 Net of Tax
Total Reclassifications for the Nine
    Months Ended September 30, 2023
$32 
Details about Accumulated Other Comprehensive Income (Loss) ComponentsAmount Reclassified From Accumulated Other Comprehensive Income (Loss)Affected Line Item in the Statement Where Net Income is Presented
Unrealized Gains and Losses on
    Available-for-Sale Securities
$23 Net Gains on Securities
(5)Income Tax Expense
18 Net of Tax
Total Reclassifications for the Three
    Months Ended September 30, 2022
$18 

Details about Accumulated Other Comprehensive Income (Loss) ComponentsAmount Reclassified From Accumulated Other Comprehensive Income (Loss)Affected Line Item in the Statement Where Net Income is Presented
Unrealized Gains and Losses on
    Available-for-Sale Securities
$473 Net Gains on Securities
(99)Income Tax Expense
374 Net of Tax
Total Reclassifications for the Nine
    Months Ended September 30, 2022
$374