EMPLOYEE BENEFIT PLANS

3 Months Ended

Mar. 31, 2018

Components of net pension expense were as follows:



	Three months ended March 31,
	2018			2017
	(In thousands)
Pension Benefits
Company-administered plans:
Service cost	$	3,201		3,249
Interest cost	19,752			21,489
Expected return on plan assets	(25,834		)	(22,478	)
Amortization of:
Net actuarial loss	7,372			8,450
Prior service cost	145			145
	4,636			10,855
Union-administered plans	2,346			2,502
Net pension expense	$	6,982		13,357

Company-administered plans:
U.S.	$	7,357		11,311
Non-U.S.	(2,721		)	(456	)
	4,636			10,855
Union-administered plans	2,346			2,502
Net pension expense	$	6,982		13,357

During the three months ended March 31, 2018, we contributed $3 million to our pension plans. In 2018, the expected total contributions to our pension plans are approximately $36 million. We also maintain other postretirement benefit plans that are not reflected in the above table. The amount of postretirement benefit expense was not material for the three months ended March 31, 2018.