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Joint Venture - Operating Results (Details) - Joint venture
$ in Thousands
3 Months Ended
Mar. 31, 2016
USD ($)
Schedule of Equity Method Investments [Line Items]  
Equity Method Investment, Summarized Financial Information, Revenue $ 31,518
Equity Method Investment, Summarized Financial Information, Cost of Sales 26,601
Equity Method Investment, Summarized Financial Information, Income Before Taxes 566
Equity Method Investment, Summarized Financial Information, Net Income (Loss) $ 622