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Etratech Acquisition - Supplemental Pro Forma Information (Detail) - Etratech Inc. - USD ($)
$ / shares in Units, $ in Thousands
3 Months Ended 9 Months Ended
Sep. 30, 2017
Sep. 30, 2017
Business Acquisition [Line Items]    
Product revenues $ 250,369 $ 769,845
Net income $ 6,411 $ 41,257
Basic earnings per share $ 0.17 $ 1.12
Diluted earnings per share $ 0.17 $ 1.12