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Etratech Acquisition - Supplemental Pro Forma Information (Detail) - Etratech Inc. - USD ($)
$ / shares in Units, $ in Thousands
3 Months Ended 6 Months Ended
Jun. 30, 2017
Jun. 30, 2017
Business Acquisition [Line Items]    
Product revenues $ 257,526 $ 519,476
Net income $ 9,072 $ 34,846
Basic earnings per share $ 0.25 $ 0.95
Diluted earnings per share $ 0.25 $ 0.95