Quarterly report pursuant to Section 13 or 15(d)

Inventories (Details)

v3.10.0.1
Inventories (Details) - USD ($)
$ in Thousands
Jun. 30, 2018
Dec. 31, 2017
Inventories    
Finished goods $ 45,836 $ 35,547
Work-in-process 7,760 7,774
Raw material and supplies 31,037 28,203
Inventories 84,633 71,524
Inventories - truck chassis floor plan $ 3,658 $ 7,711