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Income Taxes (Details Textual) (USD $)
 12 Months Ended
Dec. 31, 2011
Dec. 31, 2010
Dec. 31, 2009
Dec. 31, 2012
Dec. 31, 2008
Sep. 30, 2011
Foreign Tax Credit [Member]
Dec. 31, 2011
BRAZIL [Member]
Dec. 31, 2011
US [Member]
Dec. 31, 2011
Foreign Country [Member]
Operating Loss Carryforwards [Line Items]                  
Operating Loss Carryforwards               $ 457,500,000 $ 282,600,000
Valuation allowance           1,300,000      
Valuation allowance against the deferred tax asset                 48,600,000
Decrease in unrecognized tax benefits             400,000,000    
Deferred Tax Liability Not Recognized [Line Items]                  
Reinvested cumulative earnings 457,700,000                
Income Taxes (Textual) [Abstract]                  
Effective tax rates on continuing operations 3.90% 29.60% 26.20%            
Income taxes at U.S. federal statutory rate 35.00%                
Net operating (loss) carryforwards no expiration date 145,700,000                
Foreign tax credits carryforward period 10 years                
Unrecognized tax benefits 14,745,000 15,614,000 19,756,000   13,870,000        
Interest expense and penalties related to unrecognized tax benefits 11,900,000 10,600,000 11,900,000            
Net operating (loss) carryforwards with expiration date 44,000,000                
Foreign tax credit carryforwards 100,300,000                
Alternative minimum tax credit carryforwards 13,020,000 8,269,000              
Ownership in the stock of a corporation more than 50 percentage points over a three-year period                
Decrease in unrecognized tax benefits, upper bound       2,000,000          
Decrease in unrecognized tax benefits $ 900,000