Pension and Other Postretirement Employee Benefits (Tables)

9 Months Ended

Sep. 30, 2021

General Discussion Of Pension And Other Postretirement Benefits [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 September 30,
	Pension						OPEB
(in thousands)	2021			2020			2021			2020
Service cost	$	2,045		$	2,233		$	168		$	127
Interest cost		2,633			3,066			317			376
Expected return on plan assets		(3,525	)		(3,869	)		—			—
Amortization of prior service cost (credit)		21			29			(298	)		(319	)
Amortization of actuarial loss		3,578			3,856			545			418
Total net periodic cost	$	4,752		$	5,315		$	732		$	602
	Nine Months Ended September 30,
	Pension						OPEB
(in thousands)	2021			2020			2021			2020
Service cost	$	6,135		$	6,699		$	504		$	381
Interest cost		7,899			9,198			951			1,127
Expected return on plan assets		(10,575	)		(11,606	)		—			—
Amortization of prior service cost (credit)		63			85			(894	)		(957	)
Amortization of actuarial loss		10,877			11,569			1,635			1,254
Net periodic cost before pension settlement charge		14,399			15,945			2,196			1,805
Pension settlement charge		—			42,988			—			—
Net periodic cost	$	14,399		$	58,933		$	2,196		$	1,805