Debt and Financing Obligations (Details)
12 Months Ended
Oct. 22, 2015
Jun. 04, 2015
USD ($)
Apr. 21, 2015
Jun. 24, 2014
USD ($)
Dec. 31, 2016
USD ($)
DerivativeInstrument
item
Dec. 31, 2015
USD ($)
Dec. 31, 2014
USD ($)
Sep. 30, 2016
Feb. 24, 2016
USD ($)
Jun. 01, 2015
USD ($)
item
Jun. 19, 2014
USD ($)
Debt and Financing Obligations                      
Number of interest rate swaps | DerivativeInstrument         1            
Working Capital Revolving Credit Facility, Current         $ 274,600,000 $ 98,100,000          
Working Capital Revolving Credit Facility, Noncurrent         150,000,000 $ 150,000,000          
Stated interest rate (as a percent)             6.25%        
Number of locations acquired | item                   53  
Credit Agreement Maturing 2018 [Member]                      
Debt and Financing Obligations                      
Total available commitments         1,775,000,000            
Servicing obligation         $ 0            
Average interest rates (as a percent)         3.50% 3.60% 3.70%        
Total borrowings outstanding         $ 641,300,000            
Total remaining availability for borrowings and letters of credit         $ 764,800,000 $ 1,200,000,000          
Combined total leverage ratio         5.0     5.50      
All Revolving credit facilities                      
Debt and Financing Obligations                      
Total available commitments         $ 1,475,000,000            
Number of line of credit facilities | item         2            
Working Capital Facility [Member]                      
Debt and Financing Obligations                      
Line of Credit, Current         $ 274,600,000 98,100,000          
Total available commitments         900,000,000       $ 1,000,000,000    
Line of Credit Facility Estimated Borrowings in Next Year         150,000,000            
Long-term portion         150,000,000 150,000,000          
Increased credit facility         176,500,000            
Credit Facility Swingline Feature [Member]                      
Debt and Financing Obligations                      
Total available commitments         50,000,000            
Revolving Credit Facility [Member]                      
Debt and Financing Obligations                      
Total available commitments         575,000,000       $ 775,000,000    
Total borrowings outstanding         216,700,000            
Credit Facility Accordion Feature [Member]                      
Debt and Financing Obligations                      
Total available commitments         300,000,000            
Letter of credit                      
Debt and Financing Obligations                      
Outstanding letters of credit         68,900,000            
Senior Notes 6.25 Percent Due 2022                      
Debt and Financing Obligations                      
Aggregate principal amount         375,000,000 375,000,000 $ 375,000,000       $ 375,000,000
Stated interest rate (as a percent)             6.25%       6.25%
Minimum percentage of principal amount held by trustee or the holders to declare notes due and payable       25.00%              
Indebtedness unpaid or accelerated debt triggering debt default       $ 15,000,000              
Period for payment of default       60 days              
Percentage of notes exchanged for SEC registered notes     100.00%                
Senior Notes 7.00 Percent Due 2023 [Member]                      
Debt and Financing Obligations                      
Aggregate principal amount         $ 300,000,000 $ 300,000,000       $ 300,000,000  
Stated interest rate (as a percent)                   7.00%  
Minimum percentage of principal amount held by trustee or the holders to declare notes due and payable   25.00%                  
Percentage of principal amount that the Partnership may redeem   35.00%                  
Indebtedness unpaid or accelerated debt triggering debt default   $ 50,000,000                  
Period for payment of default   60 days                  
Percentage of notes exchanged for SEC registered notes 100.00%                    
Maximum | Credit Agreement Maturing 2018 [Member]                      
Debt and Financing Obligations                      
Commitment fee on the unused portion (as a percent)         0.50%            
Minimum | Credit Agreement Maturing 2018 [Member]                      
Debt and Financing Obligations                      
Commitment fee on the unused portion (as a percent)         0.375%            
Eurocurrency/Eurodollar rate | Maximum | Working Capital Facility [Member]                      
Debt and Financing Obligations                      
Interest rate margin (as a percent)         2.50%            
Eurocurrency/Eurodollar rate | Maximum | Revolving Credit Facility [Member]                      
Debt and Financing Obligations                      
Interest rate margin (as a percent)         3.50%            
Eurocurrency/Eurodollar rate | Minimum | Working Capital Facility [Member]                      
Debt and Financing Obligations                      
Interest rate margin (as a percent)         2.00%            
Eurocurrency/Eurodollar rate | Minimum | Revolving Credit Facility [Member]                      
Debt and Financing Obligations                      
Interest rate margin (as a percent)         2.25%            
Cost of funds rate | Maximum | Working Capital Facility [Member]                      
Debt and Financing Obligations                      
Interest rate margin (as a percent)         2.50%            
Cost of funds rate | Maximum | Revolving Credit Facility [Member]                      
Debt and Financing Obligations                      
Interest rate margin (as a percent)         3.50%            
Cost of funds rate | Minimum | Working Capital Facility [Member]                      
Debt and Financing Obligations                      
Interest rate margin (as a percent)         2.00%            
Cost of funds rate | Minimum | Revolving Credit Facility [Member]                      
Debt and Financing Obligations                      
Interest rate margin (as a percent)         2.25%            
Base rate | Maximum | Working Capital Facility [Member]                      
Debt and Financing Obligations                      
Interest rate margin (as a percent)         1.50%            
Base rate | Maximum | Revolving Credit Facility [Member]                      
Debt and Financing Obligations                      
Interest rate margin (as a percent)         2.50%            
Base rate | Minimum | Working Capital Facility [Member]                      
Debt and Financing Obligations                      
Interest rate margin (as a percent)         1.00%            
Base rate | Minimum | Revolving Credit Facility [Member]                      
Debt and Financing Obligations                      
Interest rate margin (as a percent)         1.25%            
Debt Instrument, Redemption, Period One [Member] | Senior Notes 6.25 Percent Due 2022                      
Debt and Financing Obligations                      
Percentage of principal amount that the Partnership may redeem       35.00%              
Redemption price as a percentage of principal amount       106.25%              
Debt Instrument, Redemption, Period One [Member] | Senior Notes 7.00 Percent Due 2023 [Member]                      
Debt and Financing Obligations                      
Redemption price as a percentage of principal amount   107.00%                  
Debt Instrument, Redemption, Period Two [Member] | Senior Notes 6.25 Percent Due 2022                      
Debt and Financing Obligations                      
Redemption price as a percentage of principal amount       104.688%              
Debt Instrument, Redemption, Period Two [Member] | Senior Notes 7.00 Percent Due 2023 [Member]                      
Debt and Financing Obligations                      
Redemption price as a percentage of principal amount   105.25%                  
Debt Instrument, Redemption, Period Three [Member] | Senior Notes 6.25 Percent Due 2022                      
Debt and Financing Obligations                      
Redemption price as a percentage of principal amount       103.125%              
Debt Instrument, Redemption, Period Three [Member] | Senior Notes 7.00 Percent Due 2023 [Member]                      
Debt and Financing Obligations                      
Redemption price as a percentage of principal amount   103.50%                  
Debt Instrument, Redemption, Period Four [Member] | Senior Notes 6.25 Percent Due 2022                      
Debt and Financing Obligations                      
Redemption price as a percentage of principal amount       101.563%              
Debt Instrument, Redemption, Period Four [Member] | Senior Notes 7.00 Percent Due 2023 [Member]                      
Debt and Financing Obligations                      
Redemption price as a percentage of principal amount   101.75%                  
Debt Instrument, Redemption, Period Five [Member] | Senior Notes 6.25 Percent Due 2022                      
Debt and Financing Obligations                      
Redemption price as a percentage of principal amount       100.00%              
Debt Instrument, Redemption, Period Five [Member] | Senior Notes 7.00 Percent Due 2023 [Member]                      
Debt and Financing Obligations                      
Redemption price as a percentage of principal amount   100.00%