v3.3.1.900
Summary of Significant Accounting Policies (Details 2)
12 Months Ended
Dec. 31, 2015
USD ($)
Property, Plant, and Equipment  
Minimum project cost required for capitalization of interest $ 1,000,000
Minimum period required for completion of project for capitalization of interest (in months) 6 months
Improvements to land  
Property, Plant, and Equipment  
Useful life (in years) 30 years
Buildings  
Property, Plant, and Equipment  
Useful life (in years) 30 years
Automotive equipment  
Property, Plant, and Equipment  
Useful life (in years) 5 years
Minimum | Machinery and equipment  
Property, Plant, and Equipment  
Useful life (in years) 5 years
Minimum | Furniture and fixtures  
Property, Plant, and Equipment  
Useful life (in years) 3 years
Minimum | Railcars  
Property, Plant, and Equipment  
Useful life (in years) 25 years
Maximum | Machinery and equipment  
Property, Plant, and Equipment  
Useful life (in years) 30 years
Maximum | Furniture and fixtures  
Property, Plant, and Equipment  
Useful life (in years) 7 years
Maximum | Railcars  
Property, Plant, and Equipment  
Useful life (in years) 30 years