Employee Retirement and Postretirement Benefits (Tables)

6 Months Ended

Jun. 30, 2017

Defined Benefit Plans

Defined Benefit Plan Disclosure [Line Items]

Components of Net Periodic Benefit Cost

The following table sets forth the components of net periodic benefit cost for our defined benefit plans during the three and six months ended June 30, 2017 and 2016:

	Three Months Ended June 30						Six Months Ended June 30
	2017			2016			2017			2016
	(In thousands)
Components of net periodic benefit cost:
Service cost	$	752		$	793		$	1,504		$	1,586
Interest cost	2,927			3,043			5,854			6,086
Expected return on plan assets	(4,758		)	(4,633		)	(9,516		)	(9,266		)
Amortizations:
Prior service cost	176			214			352			428
Unrecognized net loss	2,581			2,206			5,162			4,412
Net periodic benefit cost	$	1,678		$	1,623		$	3,356		$	3,246

Postretirement Benefits

Defined Benefit Plan Disclosure [Line Items]

Components of Net Periodic Benefit Cost

The following table sets forth the components of net periodic benefit cost for our postretirement benefit plans during the three and six months ended June 30, 2017 and 2016:

	Three Months Ended June 30						Six Months Ended June 30
	2017			2016			2017			2016
	(In thousands)
Components of net periodic benefit cost:
Service cost	$	146		$	160		$	292		$	320
Interest cost	240			271			480			542
Amortizations:
Prior service cost	23			23			46			46
Unrecognized net gain	(114		)	(61		)	(228		)	(122		)
Net periodic benefit cost	$	295		$	393		$	590		$	786