Revenue Recognition Remaining Performance Obligations (Details) $ in Thousands	Oct. 31, 2020 USD ($)
Revenue from Contract with Customer [Abstract]
Remaining performance obligation	$ 254,253
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Remaining performance obligation, service agreements	53,748
Remaining performance obligation, products	200,505
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2020-08-02
Revenue from Contract with Customer [Abstract]
Remaining performance obligation	$ 211,663
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Remaining performance obligation recognition period	12 months