Pension and Other Postretirement Employee Benefits (Tables)

3 Months Ended

Mar. 31, 2022

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)	2022			2021			2022			2021
Service cost	$	1,849		$	2,045		$	79		$	168
Interest cost		2,812			2,633			229			317
Expected return on plan assets		(3,145	)		(3,382	)		—			—
Amortization of prior service cost (credit)		18			21			156			(298	)
Amortization of actuarial loss (gain)		1,954			3,578			(95	)		545
Net periodic cost before pension settlement charge		3,488			4,895			369			732
Pension settlement charge		14,165			—			—			—
Total net periodic cost	$	17,653		$	4,895		$	369		$	732