Legal Proceedings (Details)
gal in Millions
12 Months Ended
Jun. 10, 2016
USD ($)
Feb. 03, 2016
USD ($)
Oct. 05, 2015
item
Dec. 31, 2016
location
gal
Dec. 31, 2015
USD ($)
Feb. 29, 2016
a
Alleged Violations of Clean Air Act at Albany Terminal [Member]            
Other legal proceedings            
Terminal area (in acres) | a           63
Number of plaintiffs added | item     2      
Damages sought   $ 37,500        
Transfer of Renewable Fuel Identification Numbers [Member]            
Other legal proceedings            
Damages sought         $ 12,000,000  
Damages awarded $ 1,500,000          
Damages from Product Defects [Member]            
Other legal proceedings            
Number Of Terminals Affected | location       1    
Quantity of product affected (in gallons) | gal       14