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Segment Reporting Information (Parenthetical) (Detail) - USD ($)
$ in Thousands
3 Months Ended 9 Months Ended
Sep. 30, 2015
Sep. 30, 2014
Sep. 30, 2015
Sep. 30, 2014
Segment Reporting Information [Line Items]        
Loss on sale of a manufacturing facility     $ (191) $ (1,042)
Global Truck And Bus        
Segment Reporting Information [Line Items]        
Equipment transfer expense $ 300 $ 100 $ 1,500 500
Global Truck And Bus | OHIO        
Segment Reporting Information [Line Items]        
Loss on sale of a manufacturing facility       $ 800