Acquisitions (Gilat Satellite Networks Ltd.) (Details)		3 Months Ended												6 Months Ended	8 Months Ended	12 Months Ended
	Sep. 24, 2020 USD ($) $ / shares	Jul. 31, 2020 USD ($)	Apr. 30, 2020 USD ($)	Jan. 31, 2020 USD ($)	Oct. 31, 2019 USD ($)	Jul. 31, 2019 USD ($)	Apr. 30, 2019 USD ($)	Jan. 31, 2019 USD ($)	Oct. 31, 2018 USD ($)	Jul. 31, 2018 USD ($)	Apr. 30, 2018 USD ($)	Jan. 31, 2018 USD ($)	Oct. 31, 2017 USD ($)	Jun. 30, 2020 USD ($)	Sep. 24, 2020 USD ($) $ / shares	Jul. 31, 2020 USD ($)	Jul. 31, 2019 USD ($)	Jul. 31, 2018 USD ($)
Business Acquisition [Line Items]
Net sales		$ 149,673,000	$ 135,121,000	$ 161,654,000	$ 170,267,000	$ 176,372,000	$ 170,448,000	$ 164,133,000	$ 160,844,000	$ 167,435,000	$ 147,854,000	$ 133,731,000	$ 121,569,000			$ 616,715,000	$ 671,797,000	$ 570,589,000
Adjusted EBITDA																77,803,000	93,472,000	78,374,000
Operating income																15,174,000	41,407,000	$ 35,075,000
Cash and cash equivalents		47,878,000				45,576,000										47,878,000	45,576,000
Non-current portion of long-term debt, net		$ 149,500,000				$ 165,000,000										$ 149,500,000	$ 165,000,000
Gilat
Business Acquisition [Line Items]
Net sales														$ 85,988,000
Adjusted EBITDA														(4,895,000)
Operating income														(14,219,000)
Cash and cash equivalents														59,601,000
Non-current portion of long-term debt, net														$ 4,000,000
Subsequent Event
Business Acquisition [Line Items]
Share price (in dollars per share) | $ / shares	$ 13.32														$ 13.32
Subsequent Event | Gilat
Business Acquisition [Line Items]
Share price (in dollars per share) | $ / shares	$ 1.12														1.12
Gilat | Subsequent Event
Business Acquisition [Line Items]
Payments to acquire business, cash per share (in dollars per share) | $ / shares															$ 7.18
Share issuance ratio															0.08425
Enterprise value	$ 465,800,000														$ 465,800,000
Payable in cash															$ 402,900,000
Consideration per acquiree share (in dollars per share) | $ / shares	$ 8.30