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Subsequent Events (Details)
$ / shares in Units, $ in Millions
3 Months Ended
Apr. 28, 2017
$ / shares
Mar. 31, 2017
USD ($)
location
item
Feb. 02, 2017
location
Feb. 02, 2017
MMBbls
Feb. 02, 2017
bbl
Mar. 31, 2017
USD ($)
location
item
Apr. 30, 2017
item
Apr. 25, 2017
USD ($)
Subsequent Events                
Number of sites in sales portfolio     6          
Aggregate storage capacity (in million barrels)       1.1 1.1      
Sites held for sale, expected period           12 months    
Disposal Group, Held-for-sale, Not Discontinued Operations [Member] | Real Estate Firm Coordinated Sale [Member]                
Subsequent Events                
Net book value of assets held for sale | $   $ 0.1       $ 0.1    
Disposal Group, Disposed of by Sale, Not Discontinued Operations [Member] | Real Estate Firm Coordinated Sale [Member]                
Subsequent Events                
Number of locations divested           45    
Number of sites classified as held for sale | item   16       16    
Gasoline Distribution and Station Operations | Disposal Group, Held-for-sale, Not Discontinued Operations [Member] | Real Estate Firm Coordinated Sale [Member]                
Subsequent Events                
Number of sites in sales portfolio   75       75    
Number of sites classified as held for sale   22       22    
Subsequent event                
Subsequent Events                
Distribution Made to Limited Liability Company (LLC) Member, Distributions Declared, Per Unit | $ / shares $ 0.4625              
Subsequent event | Disposal Group, Held-for-sale, Not Discontinued Operations [Member] | Real Estate Firm Coordinated Sale [Member]                
Subsequent Events                
Number of additional sites classified as held for sale | item             1  
Subsequent event | Annualized basis                
Subsequent Events                
Distribution Made to Limited Liability Company (LLC) Member, Distributions Declared, Per Unit | $ / shares $ 1.85              
Subsequent event | Third Amended and Restated Credit Agreement [Member]                
Subsequent Events                
Total available commitments | $               $ 1,300.0