Leases (Summary of Activity and Other Information Relating to Operating Leases) (Details) - USD ($) $ in Thousands	12 Months Ended
	Jun. 30, 2021	Jun. 30, 2020
Leases [Abstract]
Operating lease costs	$ 18,840	$ 19,600
Variable lease costs	6,487	6,176
Cash paid for amounts included in the measurement of operating liabilities	22,676	21,064
ROU assets obtained for new lease obligations	$ 2,162	3,779
ROU assets obtained from Aerohive business combination		$ 6,336
Weighted average remaining lease term (in years)	3 years 8 months 12 days	4 years 3 months 18 days
Weighted Average Discount Rate	4.50%	4.50%