XML 49 R38.htm IDEA: XBRL DOCUMENT v3.19.2
Organization and Basis of Presentation (Acquisitions) (Details) - USD ($)
$ in Thousands
May 02, 2018
Jul. 28, 2019
Jan. 27, 2019
Jul. 29, 2018
Jan. 28, 2018
Business Acquisition [Line Items]          
Goodwill   $ 351,141 $ 351,141 $ 346,731 $ 341,897
IC Interconnect, Inc. [Member]          
Business Acquisition [Line Items]          
Goodwill $ 4,900        
Cash paid to to acquire business 7,400        
Tangible net assets acquired $ 2,500