Employee Benefit Plans (Tables)

3 Months Ended

Mar. 31, 2012

Employee Benefit Plans [Abstract]

Summary Of The Net Periodic Benefit (Credit)

	Three Months Ended March  31,
	2012			2011
Service cost	$	1,040		$	2,014
Interest cost		881			344
Expected return on assets		(2,606	)		(841	)
Prior service costs		438			178
Actuarial loss		—			—
Net periodic pension cost(credit)	$	(247	)	$	1,695