Annual report pursuant to Section 13 and 15(d)

Sale of Quality Assurance Business (Details)

v3.8.0.1
Sale of Quality Assurance Business (Details) - USD ($)
$ in Thousands
3 Months Ended 12 Months Ended
Oct. 29, 2017
Jul. 30, 2017
Apr. 30, 2017
Jan. 29, 2017
Oct. 30, 2016
Jul. 31, 2016
May 01, 2016
Jan. 31, 2016
Oct. 29, 2017
Oct. 30, 2016
Nov. 01, 2015
Oct. 27, 2017
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]                        
Gain from divestitures $ 48,033 $ 0 $ 3,938 $ 0 $ 0 $ 0 $ 1,663 $ 0 $ 51,971 $ 1,663 $ 0  
Quality Assurance Business | Disposed of by sale                        
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]                        
Purchase price                       $ 66,400
Gain from divestitures $ (48,000)                      
Income before provision for income taxes                 $ 4,487 $ 9,822 $ 15,767