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Organization and Basis of Presentation (Acquisitions) (Details) - USD ($)
$ in Thousands
Aug. 17, 2018
May 02, 2018
Oct. 27, 2019
Jan. 27, 2019
Oct. 28, 2018
Jan. 28, 2018
Business Acquisition [Line Items]            
Goodwill     $ 351,141 $ 351,141 $ 355,175 $ 341,897
TrackNet Acquisition            
Business Acquisition [Line Items]            
Purchase price $ 8,500          
Goodwill       4,300    
Intangible net assets acquired       3,000    
Tangible assets acquired       300    
IC Interconnect, Inc.            
Business Acquisition [Line Items]            
Goodwill       $ 4,900    
Cash paid to to acquire business   $ 7,400        
Intangible net assets acquired   $ 2,500