Cost of Manufactured Inventory Includes Raw Material, Labor and Overhead (Detail) - USD ($) $ in Thousands	Dec. 31, 2015	Dec. 31, 2014
Inventory [Line Items]
Raw materials and components	$ 65,790	$ 63,847
Work in progress	18,201	23,145
Finished goods	67,260	68,923
Aftermarket parts	8,714	8,446
Used trailers	7,017	12,783
Total, Inventories	$ 166,982	$ 177,144