v3.2.0.727
Inventories - Inventories (Detail) - USD ($)
$ in Thousands
Jun. 30, 2015
Dec. 31, 2014
Inventory Disclosure [Abstract]    
Raw materials $ 31,846 $ 28,283
Work-in-process 20,704 19,169
Finished goods 82,448 84,020
Total 134,998 131,472
Adjust to LIFO cost (42,436) (53,221)
Lower of cost or market adjustment 0 0
Inventory, net $ 92,562 $ 78,251