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Pensions and Other Postretirement Benefit Plans (Tables)
 6 Months Ended
Jun. 30, 2025
Retirement Benefits [Abstract]  
Schedule of Net Benefit Costs
The composition of the net periodic benefit cost/(income) for the six months ended June 30, 2025 and 2024, was as follows:
Pension plans
Other postretirement benefits
(in thousands)
2025202420252024
Components of net periodic benefit cost/(income):
Service cost
$552 $986 $20 $23 
Interest cost2,947 3,043 707 709 
Expected return on assets
(2,250)(2,698)— — 
Curtailment cost/(income)
(3,770)— — — 
Settlement cost/(income)
2,170 — — — 
Amortization of prior service cost/(income)(13)(14)(61)(62)
Amortization of net actuarial loss
609 372 (16)(18)
Net periodic benefit cost/(credit)
$245 $1,689 $650 $652