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Comprehensive Loss
9 Months Ended
Sep. 30, 2011
Stockholders' Equity/Comprehensive Loss [Abstract] 
Comprehensive Loss
7.   Comprehensive Loss
    The following table summarizes net income (loss) plus changes in accumulated other comprehensive loss, a component of stockholders’ equity, in the consolidated statement of financial position:
                 
    Nine Months Ended September 30,  
    2011     2010  
Net income
  $ 53,631     $ 67,903  
Foreign currency translation adjustments
    (23,860 )     3,354  
Minimum pension liability adjustments, net of tax effect of $3,897 in 2011 and $(1,672) in 2010
    5,845       (2,508 )
 
           
Total comprehensive income
  $ 35,616     $ 68,749  
 
           
                 
    Three Months Ended September 30,  
    2011     2010  
Net income
  $ 123,491     $ 122,322  
Foreign currency translation adjustments
    (37,004 )     7,225  
Minimum pension liability adjustments, net of tax effect of $6,792 in 2011 and $1,583 in 2010
    10,188       2,642  
 
           
Total comprehensive income
  $ 96,675     $ 132,189