Leases (Summary of Activity and Other Information Relating to Operating Leases) (Details) $ in Thousands	3 Months Ended	9 Months Ended
	Mar. 31, 2020 USD ($)	Mar. 31, 2020 USD ($)
Leases [Abstract]
Operating lease costs	$ 4,871	$ 14,874
Variable lease costs	1,613	4,548
Cash paid for amounts included in the measurement of operating liabilities	5,328	16,159
ROU assets obtained for new lease obligations	$ 1,103	2,525
ROU assets obtained from Aerohive business combination		$ 6,336
Weighted average remaining lease term (in years)	4 years 6 months	4 years 6 months
Weighted Average Discount Rate	4.50%	4.50%