Pension and Other Postretirement Employee Benefits (Tables)

3 Months Ended

Mar. 31, 2023

Retirement Benefits, Description [Abstract]

Components of Net Periodic Cost (Benefit)

The following table details the components of net periodic cost (benefit) of our pension plans and other postretirement employee benefits (OPEB):

	Three Months Ended March 31,
	Pension						OPEB
(in thousands)	2023			2022			2023			2022
Service cost	$	1,356		$	1,849		$	27		$	79
Interest cost		3,138			2,812			294			229
Expected return on plan assets		(3,028	)		(3,145	)		—			—
Amortization of prior service cost		11			18			—			156
Amortization of actuarial (gain) loss		(21	)		1,954			(166	)		(95	)
Net periodic cost before pension settlement charge		1,456			3,488			155			369
Pension settlement charge		—			14,165			—			—
Total net periodic cost	$	1,456		$	17,653		$	155		$	369