Employee Retirement and Postretirement Benefits (Tables)

3 Months Ended

Mar. 31, 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 months ended March 31, 2017 and 2016:

	Three Months Ended March 31
	2017			2016
	(In thousands)
Components of net periodic benefit cost:
Service cost	$	752		$	793
Interest cost	2,927			3,043
Expected return on plan assets	(4,758		)	(4,633		)
Amortizations:
Prior service cost	176			214
Unrecognized net loss	2,581			2,206
Net periodic benefit cost	$	1,678		$	1,623

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 months ended March 31, 2017 and 2016:

	Three Months Ended March 31
	2017			2016
	(In thousands)
Components of net periodic benefit cost:
Service cost	$	146		$	160
Interest cost	240			271
Amortizations:
Prior service cost	23			23
Unrecognized net gain	(114		)	(61		)
Net periodic benefit cost	$	295		$	393