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Joint Ventures (Additional Information) (Details)
$ in Thousands
3 Months Ended 6 Months Ended
Jun. 30, 2018
USD ($)
joint_venture
Jun. 30, 2017
USD ($)
Jun. 30, 2018
USD ($)
joint_venture
Jun. 30, 2017
USD ($)
Dec. 31, 2017
USD ($)
Schedule of Equity Method Investments [Line Items]          
Number of joint ventures that are 50% owned (entity) | joint_venture 2   2    
Equity income related to joint ventures $ 1,804 $ 966 $ 2,811 $ 1,976  
Due from joint ventures, current $ 3,000   $ 3,000   $ 3,700
Rogers INOAC Corporation (RIC)          
Schedule of Equity Method Investments [Line Items]          
Ownership interest in joint venture (percent) 50.00%   50.00%    
Corporate Joint Venture          
Schedule of Equity Method Investments [Line Items]          
Due to related parties, current $ 1,900   $ 1,900   $ 2,100