PENSION PLANS AND OTHER POSTRETIREMENT BENEFITS (Tables)

9 Months Ended

Sep. 30, 2024

Retirement Benefits [Abstract]

Schedule of Net Benefit Costs

Components of net periodic cost (benefit) included in net loss are as follows:

	Pension Benefits								Other Benefits
	Three Months Ended September 30,				Nine Months Ended September 30,				Three Months Ended September 30,				Nine Months Ended September 30,
(in thousands)	2024		2023		2024		2023		2024		2023		2024		2023
Interest cost	$	10,811	$	11,447	$	32,423	$	34,462	$	70	$	92	$	210	$	276
Expected return on plan assets	(11,201)		(11,709)		(33,593)		(35,112)		—		—		—		—
Amortization of prior service cost	53		53		159		158		173		173		519		519
Benefit plans, net (1)	(337)		(209)		(1,011)		(492)		243		265		729		795
Service cost included in COS (2)	173		146		514		435		5		4		14		12
Net periodic cost (benefit)	$	(164)	$	(63)	$	(497)	$	(57)	$	248	$	269	$	743	$	807

(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.