Pension and Other Post-Employment Benefit Plans (Tables)

3 Months Ended

Mar. 31, 2013

Pension and Other Postretirement Benefit Expense [Abstract]

Components of net periodic benefit cost

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

	Three Months Ended March 31,
Post-Employment Benefit Plan Expense	2013			2012			2013		2012
(Amounts in thousands)	Pension Benefits						Other Benefits
Service cost	$	1,318		$	1,026		$	93	$	96
Interest cost	2,699			2,692			425		470
Expected return on plan assets	(3,890		)	(3,577		)	—		—
Amortization of net actuarial losses	1,992			1,936			355		435
Total net periodic benefit cost	$	2,119		$	2,077		$	873	$	1,001