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Accumulated Other Comprehensive Income (Loss) (Tables)
 9 Months Ended
Sep. 30, 2023
Equity [Abstract]  
Schedule of Changes in Accumulated Other Comprehensive Income (Loss) The following presents the changes in accumulated other comprehensive income (loss) for the three and nine months ended September 30, 2023 and 2022:
Three Months Ended September 30,
20232022
(in thousands)Pension and Other Postretirement BenefitsNet Unrealized Gains (Losses) on Available-for-Sale SecuritiesTotalPension and Other Postretirement BenefitsNet Unrealized Gains (Losses) on Available-for-Sale SecuritiesTotal
Balance, Beginning of Period$1,281 $(400)$881 $(6,621)$(292)$(6,913)
Other Comprehensive Loss Before Reclassifications, net of tax(275)(17)(292)— (172)(172)
Amounts Reclassified from Accumulated Other Comprehensive Income (Loss)585 
(1)
— 
(2)
585 106 
(1)
1 
(2)
107 
Total Other Comprehensive Income (Loss)310 (17)293 106 (171)(65)
Balance, End of Period$1,591 $(417)$1,174 $(6,515)$(463)$(6,978)
Nine Months Ended September 30,
20232022
(in thousands)Pension and Other Postretirement BenefitsNet Unrealized Gains (Losses) on Available-for-Sale SecuritiesTotalPension and Other Postretirement BenefitsNet Unrealized Gains (Losses) on Available-for-Sale SecuritiesTotal
Balance, Beginning of Period$1,334 $(419)$915 $(6,537)$13 $(6,524)
Other Comprehensive Income (Loss) Before Reclassifications, net of tax(275)1 (274)— (477)(477)
Amounts Reclassified from Accumulated Other Comprehensive Income (Loss)532 
(1)
1 
(2)
533 22 
(1)
1 
(2)
23 
Total Other Comprehensive Income (Loss)257 2 259 22 (476)(454)
Balance, End of Period$1,591 $(417)$1,174 $(6,515)$(463)$(6,978)
(1) Included in the computation of net periodic pension and other postretirement benefit costs. See Note 7.
(2) Included in other income (expense), net on the accompanying consolidated statements of income.