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Benefit Plans (Tables)
 9 Months Ended
Sep. 30, 2025
Retirement Benefits [Abstract]  
Components of net periodic benefit cost
Tables 10.1 and 10.2 provide the components of net periodic benefit cost for our pension, supplemental executive retirement and other postretirement benefit plans for the three and nine months ended September 30, 2025 and 2024.
Components of net periodic benefit cost
Table
10.1
Three Months Ended September 30,
Pension and Supplemental Executive Retirement PlansOther Postretirement Benefit Plans
(In thousands)2025202420252024
Company service cost$— $— $234 $417 
Interest cost3,299 3,247 311 376 
Expected return on plan assets(3,443)(3,644)(2,911)(2,493)
Amortization of:
Net actuarial losses (gains)547 522 (692)(382)
Prior service cost (credit)86 87 118 454 
Cost of settlements and curtailments1,284 — — — 
Net periodic benefit cost (benefit)$1,773 $212 $(2,940)$(1,628)
Components of net periodic benefit cost
Table10.2
Nine Months Ended September 30,
Pension and Supplemental Executive Retirement PlansOther Postretirement Benefit Plans
(In thousands)2025202420252024
Company service cost$— $— $703 $1,251 
Interest cost9,895 9,741 933 1,126 
Expected return on plan assets(10,327)(10,932)(8,733)(7,481)
Amortization of:
Net actuarial losses (gains)1,639 1,568 (2,077)(1,142)
Prior service cost (credit)259 259 353 1,360 
Cost of settlements and curtailments4,964 — — — 
Net periodic benefit cost (benefit)$6,430 $636 $(8,821)$(4,886)