XML 17 R60.htm IDEA: XBRL DOCUMENT v3.20.1
Acquisitions - Additional Information (Detail) - USD ($)
$ / shares in Units, $ in Millions
 3 Months Ended
Mar. 31, 2020
Mar. 31, 2019
Feb. 01, 2019
Business Acquisition [Line Items]      
Business acquisition share price     $ 30.00
Stock-based compensation expense $ 8.5 $ 27.8  
Electro Scientific Industries Inc [Member]      
Business Acquisition [Line Items]      
Business acquisition share price     $ 30.00
Fair value write-up of acquired finished goods inventory 7.6    
Incremental costs of sales charge 5.1    
Fair value excluding write-up of acquired property, plant and equipment $ 39.3    
Compensation expense   2.7  
Stock-based compensation expense   $ 14.0