Pension and Other Postretirement Employee Benefit Plans (Tables)

6 Months Ended

Jun. 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 June 30,
(In thousands)	2017			2016			2017			2016
	Pension Benefit Plans						Other Postretirement Employee  Benefit Plans
Service cost	$	474		$	382		$	13		$	51
Interest cost	3,296			3,633			667			810
Expected return on plan assets	(4,688		)	(4,878		)	(1		)	(1		)
Amortization of prior service cost (credit)	2			6			(384		)	(428		)
Amortization of actuarial loss (gain)	2,412			2,761			(1,821		)	(2,058		)
Net periodic cost	$	1,496		$	1,904		$	(1,526	)	$	(1,626	)

	Six months ended June 30,
(In thousands)	2017			2016			2017			2016
	Pension Benefit Plans						Other Postretirement Employee  Benefit Plans
Service cost	$	1,034		$	780		$	81		$	125
Interest cost	6,574			7,261			1,371			1,576
Expected return on plan assets	(9,382		)	(9,761		)	(1		)	(1		)
Amortization of prior service cost (credit)	4			11			(767		)	(856		)
Amortization of actuarial loss (gain)	4,937			5,645			(3,301		)	(3,441		)
Net periodic cost	$	3,167		$	3,936		$	(2,617	)	$	(2,597	)