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Pensions and Other Postretirement Benefit Plans (Tables)
 3 Months Ended
Mar. 31, 2025
Retirement Benefits [Abstract]  
Schedule of Net Benefit Costs
The composition of the net periodic benefit cost/(income) for the three months ended March 31, 2025 and 2024, was as follows:
Pension plans
Other postretirement benefits
(in thousands)
2025202420252024
Components of net periodic benefit cost/(income):
Service cost
$371 $497 $10 $12 
Interest cost1,450 1,532 353 354 
Expected return on assets
(1,232)(1,358)— — 
Curtailment cost/(income)
(3,770)— — — 
Settlement cost/(income)
2,170 — — — 
Amortization of prior service cost/(income)(6)(7)(31)(31)
Amortization of net actuarial loss
295 187 (8)(9)
Net periodic benefit cost/(credit)
$(722)$851 $324 $326