Pension and Severance Plans (Tables)

9 Months Ended

Sep. 30, 2011

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 September 30,						For the Nine Months Ended September 30,
	2011			2010			2011			2010
	(In thousands)
Components of net periodic pension cost:
Service cost	$	1,694		$	1,499		$	4,964		$	4,403
Interest cost	937			944			2,767			2,786
Expected return on plan assets	(897		)	(591		)	(2,659		)	(1,744		)
Amortization of transitional obligation	1			3			5			9
Amortization of prior service cost	67			72			223			212
Recognized actuarial loss	21			7			66			20
Net periodic pension cost	1,823			1,934			5,366			5,686
Curtailments	769			—			769			—
Settlements	168			—			168			—
Total pension expense	$	2,760		$	1,934		$	6,303		$	5,686