Pension and Other Postretirement Employee Benefits (Tables)

3 Months Ended

Mar. 31, 2020

General Discussion Of Pension And Other Postretirement Benefits [Abstract]

Components of Net Periodic Cost (Benefit)

The following tables detail 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)	2020			2019			2020			2019
Service cost	$	2,290		$	2,021		$	143		$	105
Interest cost		3,564			4,539			375			419
Expected return on plan assets		(4,586	)		(5,554	)		—			—
Amortization of prior service cost (credit)		28			53			(319	)		(2,211	)
Amortization of actuarial loss		4,154			3,427			419			307
Net periodic cost (benefit) before pension settlement charge		5,450			4,486			618			(1,380	)
Pension settlement charge		42,988			—			—			—
Total net periodic cost (benefit)	$	48,438		$	4,486		$	618		$	(1,380	)