Related Party Transactions (Details 8) $ in Thousands |
3 Months Ended | 12 Months Ended | 52 Months Ended | ||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
|
Jun. 13, 2013
USD ($)
|
Dec. 31, 2015
USD ($)
|
Sep. 30, 2015
USD ($)
|
Jun. 30, 2015
USD ($)
|
Mar. 31, 2015
USD ($)
|
Dec. 31, 2014
USD ($)
|
Sep. 30, 2014
USD ($)
|
Jun. 30, 2014
USD ($)
|
Mar. 31, 2014
USD ($)
|
Dec. 31, 2015
USD ($)
|
Dec. 31, 2014
USD ($)
|
Dec. 31, 2013
USD ($)
|
Jun. 30, 2013
railcar
|
|
| Related Party Transaction [Line Items] | |||||||||||||
| Cost of product sold (exclusive of depreciation and amortization) | $ 9,495 | $ 14,501 | $ 15,424 | $ 25,769 | $ 15,374 | $ 15,434 | $ 19,436 | $ 21,708 | $ 65,189 | $ 71,952 | $ 58,075 | ||
| American Railcar Leasing, LLC | |||||||||||||
| Related Party Transaction [Line Items] | |||||||||||||
| Purchases from related party | $ 1,100 | ||||||||||||
| Railcar Lease Agreement | American Railcar Leasing, LLC | |||||||||||||
| Related Party Transaction [Line Items] | |||||||||||||
| Number of railcars | railcar | 199 | ||||||||||||
| Purchases from related party | $ 5,000 | ||||||||||||
| Cost of product sold (exclusive of depreciation and amortization) | $ 400 | ||||||||||||