Employee Benefit Plans (Details) (USD $)	6 Months Ended
	Jun. 30, 2011
Change in Plan Assets [Roll Forward]
Discount rate	5.40%
Expected long-term return on plan assets	6.60%
Employee Benefit Plans Additional Information [Abstract]
Net period benefit costs	$ 0
Deferred Compensation Plan Assets	3,000,000
Pension Plans, Defined Benefit [Member]
Change in Benefit Obligation [Roll Forward]
Benefit obligation - beginning	118,505,000
Service cost	162,000
Interest cost	3,090,000
Actuarial gain	(6,545,000)
Benefits paid	(1,970,000)
Currency changes	3,040,000
Benefit obligation - ending	116,282,000
Change in Plan Assets [Roll Forward]
Fair value of plan assets - beginning	93,642,000
Actual return	1,807,000
Benefits paid	(1,970,000)
Currency changes	2,366,000
Fair value of plan assets - ending	97,380,000
Funded status	(18,902,000)
Weighted average discount rate benefit obligations	5.50%
Estimated Future Pension Benefit Payments [Abstract]
For the first year	1,600,000
For the second year	$ 1,600,000
Foreign Currency Exchange Rate Translation	62.5