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Employee Benefit Plans (Tables)
9 Months Ended
Sep. 30, 2011
Table Text Block Supplement [Abstract] 
Schedule of Funded Status of Defined Benefit Plan
   Defined Benefit Plan
    
Change in benefit obligation:   
    
Balance at December 31, 2010 $ 118,505
    
Service cost   242
    
Interest cost   4,613
    
Actuarial gain   (7,696)
    
Benefits paid   (2,943)
    
Currency changes   (388)
    
Benefit obligation at September 30, 2011 $ 112,333
    
Change in plan assets:   
    
Fair value of plan assets at December 31, 2010 $ 93,642
    
Actual return on plan assets   (2,136)
    
Employer contribution   1,534
    
Benefits paid   (2,943)
    
Currency changes   (343)
    
Fair value of plan assets at September 30, 2011 $ 89,754
    
Underfunded status at September 30, 2011 $ (22,579)