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Other Comprehensive Income (Loss)
12 Months Ended
Dec. 31, 2023
Equity [Abstract]  
Other Comprehensive Income (Loss) Other Comprehensive Income (Loss)
The tax effects allocated to each component of other comprehensive income (loss) were as follows:
Before Tax
Amount
Tax Expense,
(Benefit)
Net of Tax
Amount
2023
Securities available for sale and transferred securities:
Change in net unrealized gain/loss during the period$277,926 $58,364 $219,562 
Change in net unrealized gain on securities transferred to held to maturity(649)(136)(513)
Reclassification adjustment for net (gains) losses included in net income(66)(14)(52)
Total securities available for sale and transferred securities277,211 58,214 218,997 
Defined-benefit post-retirement benefit plans:
Change in the net actuarial gain/loss9,278 1,948 7,330 
Reclassification adjustment for net amortization of actuarial gain/loss included in net income as a component of net periodic cost (benefit)3,479 731 2,748 
Total defined-benefit post-retirement benefit plans12,757 2,679 10,078 
Total other comprehensive income (loss)$289,968 $60,893 $229,075 
Before Tax
Amount
Tax Expense,
(Benefit)
Net of Tax
Amount
2022
Securities available for sale and transferred securities:
Change in net unrealized gain/loss during the period$(2,143,567)$(450,149)$(1,693,418)
Change in net unrealized gain on securities transferred to held to maturity(737)(155)(582)
Total securities available for sale and transferred securities(2,144,304)(450,304)(1,694,000)
Defined-benefit post-retirement benefit plans:
Change in the net actuarial gain/loss(5,005)(1,051)(3,954)
Reclassification adjustment for net amortization of actuarial gain/loss included in net income as a component of net periodic cost (benefit)2,964 622 2,342 
Total defined-benefit post-retirement benefit plans(2,041)(429)(1,612)
Total other comprehensive income (loss)$(2,146,345)$(450,733)$(1,695,612)
2021
Securities available for sale and transferred securities:
Change in net unrealized gain/loss during the period$(231,355)$(48,585)$(182,770)
Change in net unrealized gain on securities transferred to held to maturity(971)(204)(767)
Reclassification adjustment for net (gains) losses included in net income(69)(14)(55)
Total securities available for sale and transferred securities(232,395)(48,803)(183,592)
Defined-benefit post-retirement benefit plans:
Change in the net actuarial gain/loss16,593 3,485 13,108 
Reclassification adjustment for net amortization of actuarial gain/loss included in net income as a component of net periodic cost (benefit)6,116 1,284 4,832 
Total defined-benefit post-retirement benefit plans22,709 4,769 17,940 
Total other comprehensive income (loss)$(209,686)$(44,034)$(165,652)
Activity in accumulated other comprehensive income, net of tax, was as follows:
Securities
Available
For Sale
Defined
Benefit
Plans
Accumulated
Other
Comprehensive
Income
Balance January 1, 2023$(1,313,791)$(34,503)$(1,348,294)
Other comprehensive income (loss) before reclassification
219,049 7,330 226,379 
Reclassification of amounts included in net income
(52)2,748 2,696 
Net other comprehensive income (loss) during period218,997 10,078 229,075 
Balance December 31, 2023$(1,094,794)$(24,425)$(1,119,219)
Balance January 1, 2022$380,209 $(32,891)$347,318 
Other comprehensive income (loss) before reclassification
(1,694,000)(3,954)(1,697,954)
Reclassification of amounts included in net income
— 2,342 2,342 
Net other comprehensive income (loss) during period(1,694,000)(1,612)(1,695,612)
Balance December 31, 2022$(1,313,791)$(34,503)$(1,348,294)
Balance January 1, 2021$563,801 $(50,831)$512,970 
Other comprehensive income (loss) before reclassification
(183,537)13,108 (170,429)
Reclassification of amounts included in net income
(55)4,832 4,777 
Net other comprehensive income (loss) during period(183,592)17,940 (165,652)
Balance December 31, 2021$380,209 $(32,891)$347,318