v3.3.1.900
Long-term debt (Details)
CAD in Millions, $ in Millions
12 Months Ended 24 Months Ended
May. 05, 2014
USD ($)
Feb. 24, 2014
Dec. 31, 2015
CAD
Dec. 31, 2015
CAD
Dec. 31, 2015
USD ($)
Dec. 31, 2014
USD ($)
Sep. 30, 2014
Long-term debt              
Total debt         $ 733.3    
Less: current maturities         (15.8) $ (20.0)  
Total long-term debt         717.5 1,145.9  
Long-term Debt, Fiscal Year Maturity [Abstract]              
Long-term Debt, Maturities, Repayments of Principal after Year Five         616.7    
Long-term Debt, Maturities, Repayments of Principal in Next Twelve Months         15.8    
Long-term Debt, Maturities, Repayments of Principal in Year Five         7.6    
Long-term Debt, Maturities, Repayments of Principal in Year Four         8.5    
Long-term Debt, Maturities, Repayments of Principal in Year Three         68.3    
Long-term Debt, Maturities, Repayments of Principal in Year Two         16.4    
Interest rate swaps              
Long-term debt              
Notional amount         302.3 333.9  
Senior Secured Credit Facilities | Minimum | The Partnership              
Long-term debt              
Applicable margin (as a percent)   2.75%          
Senior Secured Credit Facilities | Maximum | The Partnership              
Long-term debt              
Applicable margin (as a percent)   3.75%          
Senior secured term loan, due 2021              
Long-term debt              
Total debt         473.2 541.5  
Less: current maturities         (4.7) (5.4)  
Senior secured term loan, due 2021 | London Interbank Offered Rate (LIBOR)              
Long-term debt              
Applicable margin (as a percent)     3.75% 3.75%      
Minimum variable rate, as a percent     1.00%        
Senior secured term loan, due 2021 | London Interbank Offered Rate (LIBOR) | Interest rate swaps              
Long-term debt              
Notional amount $ 199.0       153.6    
Aggregate principal amount of debt $ 600.0       $ 473.2    
Senior secured term loan, due 2021 | London Interbank Offered Rate (LIBOR) | The Partnership              
Long-term debt              
Applicable margin (as a percent)   3.75%          
Minimum variable rate, as a percent     1.00%        
Senior secured term loan, due 2021 | London Interbank Offered Rate (LIBOR) | Minimum | Interest rate swaps              
Long-term debt              
Minimum variable rate, as a percent 1.00%            
Senior secured term loan, due 2021 | London Interbank Offered Rate (LIBOR) | Minimum | The Partnership              
Long-term debt              
Minimum variable rate, as a percent   1.00%          
Senior secured term loan, due 2021 | Base Rate | The Partnership              
Long-term debt              
Applicable margin (as a percent)   2.75% 3.75%        
Senior unsecured notes due 2018              
Long-term debt              
Total debt           319.9  
Interest rate (as a percent)     9.00% 9.00% 9.00%    
Senior unsecured notes, due June 2036              
Long-term debt              
Total debt     CAD 210.0 CAD 210.0 $ 151.7 181.0  
Interest rate (as a percent)     5.95% 5.95% 5.95%    
Senior unsecured notes, due June 2036 | The Partnership              
Long-term debt              
Interest rate (as a percent)   5.95%          
Epsilon Power Partners term facility, due 2019              
Long-term debt              
Total debt         $ 19.5 25.5  
Less: current maturities         (6.0) (6.1)  
Epsilon Power Partners term facility, due 2019 | London Interbank Offered Rate (LIBOR)              
Long-term debt              
Applicable margin (as a percent)     3.125% 3.125%      
Cadillac term loan, due 2025              
Long-term debt              
Total debt         29.5 33.4  
Less: current maturities         (2.5) (3.9)  
Cadillac term loan, due 2025 | London Interbank Offered Rate (LIBOR)              
Long-term debt              
Applicable margin (as a percent)     1.37% 1.37%      
Piedmont term loan, due 2018              
Long-term debt              
Total debt         59.0 64.0  
Less: current maturities         (2.4) (4.5)  
Piedmont term loan, due 2018 | London Interbank Offered Rate (LIBOR)              
Long-term debt              
Applicable margin (as a percent)     3.50% 3.50%      
Other long-term debt              
Long-term debt              
Total debt         0.4 0.6  
Less: current maturities         $ (0.2) (0.1)  
Other long-term debt | Minimum              
Long-term debt              
Interest rate (as a percent)     5.50% 5.50% 5.50%   5.50%
Other long-term debt | Maximum              
Long-term debt              
Interest rate (as a percent)     6.70% 6.70% 6.70%    
Meadow Creek term loan, due 2024              
Long-term debt              
Less: current maturities           (164.9)  
Rockland term loan, due 2027              
Long-term debt              
Less: current maturities           $ (83.8)