Quarterly report pursuant to Section 13 or 15(d)

Business Combinations - Additional Information (Details)

v3.10.0.1
Business Combinations - Additional Information (Details) - USD ($)
$ in Thousands
 1 Months Ended 12 Months Ended
Sep. 30, 2018
Jul. 31, 2018
Jun. 30, 2018
Dec. 31, 2018
Business Acquisition        
Goodwill acquired     $ 354,698 $ 360,480
Privately-Held Company, September 30, 2018 Acquisition        
Business Acquisition        
Total purchase consideration $ 4,100      
Additional contingent consideration, liability $ 1,500     900
Privately-Held Company, July 11, 2018 Acquisition        
Business Acquisition        
Total purchase consideration   $ 11,300    
Additional contingent consideration, liability   $ 4,500   $ 1,600
Product line from Keysight Technologies, Inc.        
Business Acquisition        
Total purchase consideration     12,100  
Goodwill acquired     $ 5,200