Pension and Other Postretirement Employee Benefits (Tables)

3 Months Ended

Mar. 31, 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 March 31,
	Pension						OPEB
(in thousands)	2021			2020			2021			2020
Service cost	$	2,045		$	2,290		$	168		$	143
Interest cost		2,633			3,564			317			375
Expected return on plan assets		(3,525	)		(4,586	)		—			—
Amortization of prior service cost (credit)		21			28			(298	)		(319	)
Amortization of actuarial loss		3,721			4,154			545			419
Net periodic cost before pension settlement charge		4,895			5,450			732			618
Pension settlement charge		—			42,988			—			—
Net periodic cost	$	4,895		$	48,438		$	732		$	618