Pension and Severance Plans (Tables)

3 Months Ended

Mar. 31, 2015

Compensation and Retirement Disclosure [Abstract]

Components of net periodic pension cost

The components of net periodic pension cost for these defined benefit plans are as follows:

	For the Three Months Ended March 31,
	2015			2014
	(In thousands)
Service cost	$	1,219		$	1,424
Interest cost	766			779
Expected return on plan assets	(856		)	(766		)
Amortization of prior service cost	9			49
Recognized actuarial loss	21			92
Net periodic pension cost	$	1,159		$	1,578

Schedule of Korean severance obligation

The balance of our Korean severance obligation consists of the following:

	March 31, 2015		December 31, 2014
	(In thousands)
Current (Accrued expenses)	$	13,809	$	13,226
Non-current (Pension and severance obligations)	133,701		133,435
Total Korean severance obligation	$	147,510	$	146,661