Pension Plans

Foreign Defined Benefit Pension Plans

Our subsidiaries in Japan, Korea, Malaysia, the Philippines and Taiwan sponsor defined benefit pension plans. Charges to expense are based upon actuarial analyses. The components of net periodic pension cost for these defined benefit pension plans are as follows:



	For the Three Months Ended March 31,
	2018			2017
	(In thousands)
Service cost	$	8,416		$	8,340
Interest cost	1,243			1,007
Expected return on plan assets	(1,442		)	(1,128		)
Amortization of prior service cost	—			31
Recognized actuarial (gain) loss	(35		)	22
Net periodic pension cost	$	8,182		$	8,272

The components of net periodic pension cost other than the service cost component are included in other (income) expense, net in our Consolidated Statements of Income.

Defined Contribution Pension Plans

We sponsor defined contribution pension plans in Korea, Malaysia, Taiwan and the U.S. The following table summarizes our defined contribution expense:



	For the Three Months Ended March 31,
	2018		2017
	(In thousands)
Defined contribution expense	$	3,996	$	3,198