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Pension and Other Postretirement Benefits
 6 Months Ended
Jun. 30, 2024
Retirement Benefits [Abstract]  
Pension and Other Postretirement Benefits Pension and Other Postretirement Benefits
Components of net periodic benefit cost (credit) were as follows:
 Pension BenefitsPostretirement Benefits
 Three months ended June 30,
(in thousands)2024202320242023
Components of net periodic benefit cost (credit)    
Service cost$1,306 $1,416 $75 $96 
Interest cost2,685 2,716 127 159 
Expected return on plan assets(1,834)(1,966)— — 
Settlements— (27)— — 
Amortization of net loss (gain)59 24 (239)(246)
Amortization of prior service cost (credit)23 46 (34)(34)
Net periodic benefit cost (credit)$2,239 $2,209 $(71)$(25)
 Pension BenefitsPostretirement Benefits
 Six months ended June 30,
(in thousands)2024202320242023
Components of net periodic benefit cost (credit)    
Service cost$2,631 $2,850 $166 $215 
Interest cost5,388 5,659 260 331 
Expected return on plan assets(3,672)(3,928)— — 
Settlements— (27)— — 
Amortization of net loss (gain)117 45 (508)(447)
Amortization of prior service cost (credit)46 92 (68)(68)
Net periodic benefit cost (credit)$4,510 $4,691 $(150)$31 
The non-service cost components of net periodic benefit cost (credit) are included in other expense, net in the unaudited condensed consolidated statements of operations.