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Long-term Debt (Details) - USD ($)
$ in Millions
12 Months Ended
Dec. 31, 2015
Dec. 31, 2013
Dec. 31, 2014
May. 01, 2012
Debt Instrument [Line Items]        
Write off of Deferred Debt Issuance Cost   $ 1.4    
Notes and Loans Payable [Abstract]        
Other $ 0.3   $ 0.8  
Long-term debt 757.8      
Less: current portion (2.1)   (2.4)  
Long-term debt, excluding current portion $ 751.8   754.8  
Senior Secure Note Maturing 2020 [Member]        
Notes and Loans Payable [Abstract]        
Debt, interest rate, stated percentage 7.50%     7.50%
Notes payable $ 350.0      
Chilean term credit facility maturing 2019        
Notes and Loans Payable [Abstract]        
Debt, interest rate, stated percentage 3.90%      
Notes payable $ 12.8   14.4  
Brazilian term credit facility maturing 2017        
Notes and Loans Payable [Abstract]        
Debt, interest rate, stated percentage 6.65%      
Notes payable $ 4.0   6.0  
Senior Notes 2018        
Notes and Loans Payable [Abstract]        
Debt, interest rate, stated percentage 7.30%      
Senior notes payable 2014 through 2019        
Notes and Loans Payable [Abstract]        
Notes payable $ 22.0   22.0  
Debt, interest rate, stated percentage, minimum 7.10%      
Debt, interest rate, stated percentage, maximum 7.30%      
Non Recourse Notes Payable 2018 [Member]        
Notes and Loans Payable [Abstract]        
Debt, interest rate, stated percentage 0.20%      
Long-term Debt [Member]        
Notes and Loans Payable [Abstract]        
Long-term debt $ 753.9   757.2  
Long-term debt, excluding current portion 751.8   754.8  
Non Recourse Notes Payable 2018 [Member] | Non Recourse Notes Payable 2018 [Member]        
Notes and Loans Payable [Abstract]        
Notes payable 368.5   368.4  
Senior Secure Note Maturing 2020 [Member] | Senior Secure Note Maturing 2020 [Member]        
Notes and Loans Payable [Abstract]        
Notes payable 346.3   345.6  
Principal [Member]        
Notes and Loans Payable [Abstract]        
Long-term debt 757.8   761.9  
Less: current portion (2.1)   (2.4)  
Long-term debt, excluding current portion 755.7   759.5  
Principal [Member] | Senior Secure Note Maturing 2020 [Member]        
Notes and Loans Payable [Abstract]        
Notes payable 350.0   350.0  
Principal [Member] | Chilean term credit facility maturing 2019        
Notes and Loans Payable [Abstract]        
Notes payable 12.8   14.4  
Principal [Member] | Brazilian term credit facility maturing 2017        
Notes and Loans Payable [Abstract]        
Notes payable 4.0   6.0  
Principal [Member] | Senior notes payable 2014 through 2019        
Notes and Loans Payable [Abstract]        
Notes payable 22.0   22.0  
Principal [Member] | Non Recourse Notes Payable 2018 [Member]        
Notes and Loans Payable [Abstract]        
Notes payable 368.7   368.7  
Unamortized Issuance Costs [Member]        
Notes and Loans Payable [Abstract]        
Deferred Finance Costs, Net (3.9)   (4.7)  
Unamortized Issuance Costs [Member] | Senior Secure Note Maturing 2020 [Member]        
Notes and Loans Payable [Abstract]        
Deferred Finance Costs, Net (3.7)   (4.4)  
Unamortized Issuance Costs [Member] | Non Recourse Notes Payable 2018 [Member]        
Notes and Loans Payable [Abstract]        
Deferred Finance Costs, Net $ (0.2)   $ (0.3)