Employee Retirement and Postretirement Benefits (Tables)

9 Months Ended

Sep. 30, 2018

Defined Benefit Plans

Defined Benefit Plan Disclosure [Line Items]

Schedule of 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 nine months ended September 30, 2018 and 2017:

	Three Months Ended September 30						Nine Months Ended September 30
	2018			2017			2018			2017
	(In thousands)
Components of net periodic benefit cost:
Service cost	$	732		$	752		$	2,196		$	2,256
Interest cost	2,828			2,927			8,484			8,781
Expected return on plan assets	(4,411		)	(4,758		)	(13,233		)	(14,274		)
Amortizations:
Prior service cost	108			176			324			528
Unrecognized net loss	2,130			2,581			6,390			7,743
Net periodic benefit cost	$	1,387		$	1,678		$	4,161		$	5,034

Postretirement Benefits

Defined Benefit Plan Disclosure [Line Items]

Schedule of 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 nine months ended September 30, 2018 and 2017:

	Three Months Ended September 30						Nine Months Ended September 30
	2018			2017			2018			2017
	(In thousands)
Components of net periodic benefit cost:
Service cost	$	170		$	146		$	510		$	438
Interest cost	235			240			705			720
Amortizations:
Prior service cost	23			23			69			69
Unrecognized net gain	(118		)	(114		)	(354		)	(342		)
Net periodic benefit cost	$	310		$	295		$	930		$	885