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Investments in and Loans to Joint Ventures (Details Textual)
$ in Thousands
12 Months Ended
Dec. 27, 2013
USD ($)
Dec. 31, 2015
USD ($)
joint_venture
Dec. 31, 2014
USD ($)
Dec. 31, 2013
USD ($)
Investments in and Loans to Joint Ventures (Textual) [Abstract]        
Number of joint ventures | joint_venture   2    
Contributions made   $ 0 $ 0 $ 136
Income (Loss) from Equity Method Investments   $ 5,812 1,570 (8,595)
Axis Credit Agreement [Member]        
Investments in and Loans to Joint Ventures (Textual) [Abstract]        
Interest rate   7.75%    
Balance outstanding on loans   $ 23,600 29,100  
Ohio Castings [Member]        
Investments in and Loans to Joint Ventures (Textual) [Abstract]        
Percentage of interest held in joint venture   33.30%    
Equity Method Investment, Net Income (Loss)   $ 1,230 5,906 1,115
Axis [Member]        
Investments in and Loans to Joint Ventures (Textual) [Abstract]        
Percentage of interest held in joint venture   41.90%    
Minority Partnership In Joint Venture   9.70%    
Other Significant Partnership In Joint Venture   48.40%    
Equity Method Investment, Net Income (Loss)   $ 12,782 $ (390) (652)
Amtek Railcar [Member]        
Investments in and Loans to Joint Ventures (Textual) [Abstract]        
Percentage of interest held in joint venture 50.00%      
Equity Method Investment, Realized Gain (Loss) on Disposal $ 5,900      
Income (Loss) from Equity Method Investments       2,800
Equity Method Investment, Realized Loss on Disposal       8,700
Equity Method Investment, Net Income (Loss)       $ (5,600)