Pension Benefits (Tables)

3 Months Ended

Mar. 31, 2013

Pension Benefits

Summary of pension costs

The following table summarizes our pension costs during the three-month periods ended March 31, 2013 and 2012 (in thousands):

	Three months ended March 31,
	2013			2012
Service cost	$	287		$	288
Interest cost	2,230			2,307
Expected return on plan assets	(3,069		)	(2,746		)
Amortization of net actuarial loss	202			166
Total net periodic cost	$	(350	)	$	15

Schedule of weighted average assumptions used to determine net costs

Weighted-Average Assumptions Used To Determine Net Cost

	Three months ended March 31,
	2013		2012
Discount rate	3.850	%	4.300	%
Rate of compensation increase	N/A		N/A
Expected return on plan assets	7.500	%	7.500	%