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PENSION PLANS AND OTHER POSTRETIREMENT BENEFITS (Tables)
3 Months Ended
Mar. 31, 2025
Retirement Benefits [Abstract]  
Schedule of Net Benefit Costs
Components of net periodic benefit cost (benefit) included in net loss are as follows:
Pension BenefitsOther Benefits
Three Months Ended March 31,Three Months Ended March 31,
(in thousands)2025202420252024
Interest cost$10,224 $10,808 $63 $70 
Expected return on plan assets(9,683)(11,200)— — 
Amortization of prior service cost78 53 71 173 
Benefit plans, net (1)
619 (339)134 243 
Service cost included in COS (2)
195 171 
Net periodic benefit cost (benefit)$814 $(168)$139 $247 
(1) Benefit plans, net, which is presented separately in the Condensed Consolidated Statements of Operations, is not allocated to the segments.
(2) Service cost related to a small group of active participants is presented within Cost of operations in the Condensed Consolidated Statements of Operations and is recorded at the B&W Thermal segment level.