XML 56 R44.htm IDEA: XBRL DOCUMENT v3.8.0.1
Inventories - Summary of Inventories (Detail) - USD ($)
$ in Thousands
Mar. 31, 2018
Dec. 31, 2017
Inventory Disclosure [Abstract]    
Raw materials $ 38,151 $ 37,337
Work in process 32,124 27,669
Finished goods 21,284 17,611
Inventories $ 91,559 $ 82,617