Acquisitions - Omnia (Details) - USD ($)		12 Months Ended
	Feb. 01, 2019	Jul. 31, 2020	Jul. 31, 2019	Jul. 31, 2018
Business Acquisition [Line Items]
Acquisition of business, net of cash acquired		$ 721,350,000	$ 40,644,000	$ 87,488,000
Omnia S.p.A.
Business Acquisition [Line Items]
Total consideration for the transaction, excluding acquisition-related costs	$ 19,007,000
Acquisition of business, net of cash acquired	15,797,000
Common stock issued	3,210,000
Minimum | Omnia S.p.A.
Business Acquisition [Line Items]
Contingent consideration	0
Maximum | Omnia S.p.A.
Business Acquisition [Line Items]
Contingent consideration	$ 5,800,000