v3.5.0.2
Property, Plant and Equipment (Details) - USD ($)
$ in Thousands
3 Months Ended 9 Months Ended
Sep. 30, 2016
Sep. 30, 2015
Sep. 30, 2016
Sep. 30, 2015
Dec. 31, 2015
Property, Plant, and Equipment          
Gross property, plant and equipment $ 1,391,914   $ 1,391,914   $ 602,138
Less: Accumulated depreciation 251,749   251,749   209,005
Total property, plant and equipment, net 1,140,165   1,140,165   393,133
Capitalized interest 21 $ 9 400 $ 9  
Land and improvements          
Property, Plant, and Equipment          
Gross property, plant and equipment 12,971   12,971   5,441
Buildings and improvements          
Property, Plant, and Equipment          
Gross property, plant and equipment 14,881   14,881   3,049
Machinery and equipment          
Property, Plant, and Equipment          
Gross property, plant and equipment 1,341,361   1,341,361   574,326
Automotive equipment          
Property, Plant, and Equipment          
Gross property, plant and equipment 569   569   448
Furniture and fixtures          
Property, Plant, and Equipment          
Gross property, plant and equipment 1,355   1,355   918
Railcars          
Property, Plant, and Equipment          
Gross property, plant and equipment 16,261   16,261   16,315
Construction in progress          
Property, Plant, and Equipment          
Gross property, plant and equipment $ 4,516   $ 4,516   $ 1,641