Pension and Severance Plans (Tables)

3 Months Ended

Mar. 31, 2012

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,
	2012			2011
	(In thousands)
Components of net periodic pension cost and total pension expense:
Service cost	$	1,701		$	1,628
Interest cost	821			909
Expected return on plan assets	(783		)	(875		)
Amortization of transition obligation	2			2
Amortization of prior service cost	70			78
Recognized actuarial loss	51			22
Net periodic pension cost	1,862			1,764
Curtailment loss	1,089			—
Settlement gain	(100		)	—
Total pension expense	$	2,851		$	1,764

Schedule of severance obligation

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

	March 31, 2012		December 31, 2011
	(In thousands)
Current (Accrued expenses)	$	7,224	$	7,476
Non-current (Pension and severance obligations)	100,135		99,000
Total Korean severance obligation	$	107,359	$	106,476