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Acquisitions (Acquisition Plan Expenses) (Details) - USD ($)
12 Months Ended
Jul. 31, 2021
Jul. 31, 2020
Jul. 31, 2019
Business Acquisition [Line Items]      
Acquisition plan expenses $ 100,292,000 $ 20,754,000 $ 5,871,000
Incremental interest expense on financing commitment letter 1,178,000    
Gilat      
Business Acquisition [Line Items]      
Payments of acquisition expenses 70,000,000    
Gilat      
Business Acquisition [Line Items]      
Acquisition plan expenses $ 88,343,000