Acquisitions Acquisitions - Omnia (Details) - USD ($)		3 Months Ended		12 Months Ended
	Feb. 01, 2019	Oct. 31, 2019	Oct. 31, 2018	Jul. 31, 2019
Business Acquisition [Line Items]
Cash consideration		$ 658,932,000	$ 17,000,000
Contingent consideration		$ 35,100,000		$ 0
Omnia
Business Acquisition [Line Items]
Total consideration	$ 19,808,000			19,808,000
Cash consideration	16,598,000
Stock consideration	3,210,000			$ 3,210,000
Contingent consideration	0
Minimum | Omnia
Business Acquisition [Line Items]
Contingent consideration	0
Maximum | Omnia
Business Acquisition [Line Items]
Contingent consideration	$ 5,800,000