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Income Taxes (Details 7) (USD $)
 12 Months Ended 1 Months Ended 3 Months Ended 12 Months Ended 3 Months Ended 12 Months Ended
Dec. 31, 2013
Dec. 31, 2012
Oct. 31, 2012
Dec. 31, 2011
Dec. 31, 2013
U.S. federal
Dec. 31, 2013
U.S. federal
Minimum
Dec. 31, 2013
Foreign
Dec. 31, 2013
Foreign
Italy
Dec. 31, 2013
Foreign
Italy
Dec. 31, 2011
Foreign
Brazil
Dec. 31, 2013
Foreign
Brazil
Operating loss carryforwards                      
Net operating loss carryforward         $ 177,000,000   $ 360,200,000        
Net operating loss carryforwards, not subject to expiration             199,000,000        
Net operating loss carryforwards, subject to expiration             60,500,000        
Foreign tax credit carryforwards available to offset future payments 124,850,000 110,191,000         124,900,000        
Alternative minimum tax credit carryforwards available to offset future payments 5,615,000 5,920,000                  
Valuation allowance recorded against deferred tax asset               9,000,000   48,600,000  
Minimum taxable income for realization of deferred tax asset                 40,000,000   400,000,000
Cumulative earnings generated by non-U.S. subsidiaries             757,100,000        
Percentage of telephone excise tax refund claims settled           90.00%          
Change in ownership percentage, minimum 50.00%                    
Period of ownership percentage change 3 years                    
Unrecognized tax benefits , which if recognized would affect the effective tax rate 11,300,000 9,600,000   14,700,000              
Potential interest expense and penalties related to unrecognized tax benefits 3,400,000 2,400,000   11,900,000              
Aggregate over assessment on income tax examination     900,000                
Amount of disallowance of telephone excise tax refund claims for which protests were filed with the Appeals Division of the IRS     500,000                
State income tax returns, period subject to examination, low end of range 3 years                    
State income tax returns, period subject to examination, high end of range 5 years                    
State income tax examination period after formal notification, maximum 1 year                    
Maximum reasonably possible decrease in unrecognized tax benefits $ 2,200,000