Inventories (Detail) - USD ($) $ in Thousands	Jun. 30, 2016	Dec. 31, 2015
Inventory [Line Items]
Finished goods	$ 115,462	$ 67,260
Used trailers	5,894	7,017
Raw materials and components	58,809	65,790
Aftermarket parts	9,187	8,714
Work in progress	23,664	18,201
Total, Inventories	$ 213,016	$ 166,982