Acquisitions, Dispositions And Discontinued Operations (Schedule Of Cash Paid Net Of Cash Received Related To Acquisition Of DNI) (Details) - USD ($) $ in Thousands	12 Months Ended
	Jun. 30, 2020	Jun. 30, 2019	[1]	Jun. 30, 2018		Jun. 28, 2018
Business Acquisition [Line Items]
Total cash paid, net of cash received	$ 0	$ 0		$ 6,202	[1]
Acquire 6% Voting And Economic Interest [Member]
Business Acquisition [Line Items]
Total cash paid, net of cash received				6,202
DNI [Member]
Business Acquisition [Line Items]
Percentage of voting and economic interest acquired						55.00%
DNI [Member] | Acquire 6% Voting And Economic Interest [Member]
Business Acquisition [Line Items]
Total cash paid, net of cash received				$ 6,202
Percentage of voting and economic interest acquired				6.00%
DNI [Member] | Acquire 55% Voting And Economic Interest [Member]
Business Acquisition [Line Items]
Total cash paid, net of cash received				$ 85,700
Percentage of voting and economic interest acquired				55.00%

[1] Certain amounts have been restated to correct the misstatement discussed in Note 1