Pension and Other Postretirement Employee Benefit Plans (Tables)

9 Months Ended

Sep. 30, 2017

Compensation and Retirement Disclosure [Abstract]

Components of Net Periodic Cost of Pension and Other Postretirement Employee Benefit Plans

The following table details the components of net periodic cost of our company-sponsored pension and OPEB plans for the periods presented:

	Three Months Ended September 30,
(In thousands)	2017			2016			2017			2016
	Pension Benefit Plans						Other Postretirement Employee  Benefit Plans
Service cost	$	518		$	391		$	41		$	62
Interest cost	3,288			3,518			688			730
Expected return on plan assets	(4,691		)	(4,847		)	—			—
Amortization of prior service cost (credit)	2			6			(384		)	(428		)
Amortization of actuarial loss (gain)	2,468			2,865			(1,662		)	(2,233		)
Settlement	—			3,482			—			—
Net periodic cost	$	1,585		$	5,415		$	(1,317	)	$	(1,869	)

	Nine months ended September 30,
(In thousands)	2017			2016			2017			2016
	Pension Benefit Plans						Other Postretirement Employee  Benefit Plans
Service cost	$	1,552		$	1,171		$	122		$	187
Interest cost	9,862			10,779			2,059			2,306
Expected return on plan assets	(14,073		)	(14,608		)	(1		)	(1		)
Amortization of prior service cost (credit)	6			17			(1,151		)	(1,284		)
Amortization of actuarial loss (gain)	7,405			8,510			(4,963		)	(5,674		)
Settlement	—			3,482			—			—
Net periodic cost	$	4,752		$	9,351		$	(3,934	)	$	(4,466	)