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Segments - Information on Segments and Reconciliation to Earnings Before Income Taxes from Continuing Operations (Footnote) (Details) - USD ($)
$ in Thousands
12 Months Ended
Dec. 31, 2016
Oct. 15, 2016
Dec. 31, 2015
Dec. 31, 2014
Segment Reporting Information [Line Items]        
Progressive-Related Transaction Costs $ 0   $ 0 $ 6,638
Sales and Lease Ownership | Operating Segments        
Segment Reporting Information [Line Items]        
Loss related to lease termination     3,500  
Progressive | Operating Segments        
Segment Reporting Information [Line Items]        
Progressive-Related Transaction Costs   $ 3,700    
Manufacturing | Operating Segments        
Segment Reporting Information [Line Items]        
Inventory, including raw materials and work-in-process $ 14,300   $ 19,400 $ 13,200