Pension Plan (Tables)

9 Months Ended

Sep. 30, 2011

Pension Plan

Components Of Pension Costs, U.K. Pension Plan

	Three Months Ended September  30,						Nine Months Ended September 30,
	2010			2011			2010			2011
Interest cost	$	794		$	816		$	2,357		$	2,456
Expected return on plan assets		(619	)		(745	)		(1,837	)		(2,242	)
Amortization of losses		265			212			787			639
Net periodic pension cost	$	440		$	283		$	1,307		$	853