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Revenue Recognition Remaining Performance Obligations (Details)
$ in Thousands
Aug. 03, 2019
USD ($)
Revenue from Contract with Customer [Abstract]  
Remaining performance obligation $ 263,406
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]  
Remaining performance obligation, service agreements 56,416
Remaining performance obligation, products 206,990
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2018-10-28  
Revenue from Contract with Customer [Abstract]  
Remaining performance obligation $ 226,999
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2019-01-27  
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]  
Remaining performance obligation recognition period 12 months