Pension and Other Postretirement Employee Benefits (Tables)

6 Months Ended

Jun. 30, 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 June 30,
	Pension						OPEB
(in thousands)	2022			2021			2022			2021
Service cost	$	1,652		$	2,045		$	79		$	168
Interest cost		2,611			2,633			229			317
Expected return on plan assets		(2,258	)		(3,525	)		—			—
Amortization of prior service cost (credit)		18			21			156			(298	)
Amortization of actuarial loss (gain)		1,148			3,578			(95	)		545
Total net periodic cost	$	3,171		$	4,752		$	369		$	732
	Six Months Ended June 30,
	Pension						OPEB
(in thousands)	2022			2021			2022			2021
Service cost	$	3,501		$	4,090		$	158		$	336
Interest cost		5,423			5,266			458			634
Expected return on plan assets		(5,403	)		(7,050	)		—			-
Amortization of prior service cost (credit)		36			42			312			(596	)
Amortization of actuarial loss (gain)		3,102			7,299			(190	)		1,090
Net periodic cost before pension settlement charge		6,659			9,647			738			1,464
Pension settlement charge		14,165			—			—			—
Net periodic cost	$	20,824		$	9,647		$	738		$	1,464