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Pension and Other Postretirement Benefits
 9 Months Ended
Sep. 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 September 30,
(in thousands)2024202320242023
Components of net periodic benefit cost (credit)    
Service cost$1,327 $1,411 $84 $107 
Interest cost2,645 2,832 129 166 
Expected return on plan assets(1,838)(1,966)— — 
Settlements142 — — — 
Amortization of net loss (gain)60 25 (252)(223)
Amortization of prior service cost (credit)24 45 (35)(35)
Net periodic benefit cost (credit)$2,360 $2,347 $(74)$15 
 Pension BenefitsPostretirement Benefits
 Nine months ended September 30,
(in thousands)2024202320242023
Components of net periodic benefit cost (credit)    
Service cost$3,958 $4,261 $250 $322 
Interest cost8,033 8,491 389 497 
Expected return on plan assets(5,510)(5,894)— — 
Settlements142 (27)— — 
Amortization of net loss (gain)177 70 (760)(670)
Amortization of prior service cost (credit)70 137 (103)(103)
Net periodic benefit cost (credit)$6,870 $7,038 $(224)$46 
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.