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Other Comprehensive Income (Loss)
 12 Months Ended
Dec. 31, 2024
Equity [Abstract]  
Other Comprehensive Income (Loss) Other Comprehensive Income (Loss)
(In Thousands)
Changes in the components of other comprehensive income (loss), net of tax, were as follows:
Pre-TaxTax  Expense
(Benefit)		Net of Tax
Year Ended December 31, 2024
Securities available for sale:
Unrealized holding gains on securities$1,455 $381 $1,074 
Amortization of unrealized holding losses on securities transferred to the held to maturity category12,731 3,255 9,476 
Total securities available for sale14,186 3,636 10,550 
Derivative instruments:
Unrealized holding gains on derivative instruments508 130 378 
Total derivative instruments508 130 378 
Defined benefit pension and post-retirement benefit plans:
Net gain arising during the period543 138 405 
Amortization of net actuarial loss recognized in net periodic pension cost(2)
423 108 315 
Total defined benefit pension and post-retirement benefit plans966 246 720 
Total other comprehensive income$15,660 $4,012 $11,648 
Year Ended December 31, 2023
Securities available for sale:
Unrealized holding gains on securities$20,194 $5,066 $15,128 
Reclassification adjustment for gains realized in net income(2)
41,494 10,431 31,063 
Amortization of unrealized holding losses on securities transferred to the held to maturity category13,557 3,466 10,091 
Total securities available for sale75,245 18,963 56,282 
Derivative instruments:
Unrealized holding losses on derivative instruments(2,558)(653)(1,905)
Total derivative instruments(2,558)(653)(1,905)
Defined benefit pension and post-retirement benefit plans:
Net gain arising during the period80 20 60 
Amortization of net actuarial loss recognized in net periodic pension cost(1)
462 118 344 
Total defined benefit pension and post-retirement benefit plans542 138 404 
Total other comprehensive income$73,229 $18,448 $54,781 
 Pre-TaxTax  Expense
(Benefit)		Net of Tax
Year Ended December 31, 2022
Securities available for sale:
Unrealized holding losses on securities$(285,829)$(71,478)$(214,351)
Amortization of unrealized holding losses on securities transferred to the held to maturity category4,964 1,263 3,701 
Total securities available for sale(280,865)(70,215)(210,650)
Derivative instruments:
Unrealized holding gains on derivative instruments20,118 5,125 14,993 
Total derivative instruments20,118 5,125 14,993 
Defined benefit pension and post-retirement benefit plans:
Net loss arising during the period(4,107)(1,045)(3,062)
Amortization of net actuarial loss recognized in net periodic pension cost(2)
167 42 125 
Total defined benefit pension and post-retirement benefit plans(3,940)(1,003)(2,937)
Total other comprehensive loss$(264,687)$(66,093)$(198,594)
(1) Included in Salaries and employee benefits in the Consolidated Statements of Income
(2) Included in Net (losses) gains on sales of securities and Impairment losses on securities in the Consolidated Statements of Income

The accumulated balances for each component of other comprehensive loss, net of tax, at December 31 were as follows:
 202420232022
Unrealized losses on securities$(152,934)$(163,484)$(219,766)
Unrealized gains on derivative instruments17,429 17,051 18,956 
Unrecognized losses on defined benefit pension and post-retirement benefit plans obligations(7,103)(7,823)(8,227)
Total accumulated other comprehensive loss$(142,608)$(154,256)$(209,037)