Income Taxes (Schedule Of Deferred Tax Assets And Liabilities) (Details) - USD ($) $ in Thousands	Jun. 30, 2022	Jun. 30, 2021
Income Tax [Abstract]
Capital losses related to investments	$ 42,587	$ 47,518
Net operating loss carryforwards	40,384	36,329
Foreign tax credits	32,671	32,737
Provisions and accruals	3,163	2,123
FTS patent	95	163
Other	2,063	654
Total deferred tax assets before valuation allowance	120,963	119,524
Valuation allowances	(117,101)	(118,777)
Total deferred tax assets, net of valuation allowance	3,862	747
Intangible assets	43,876	100
Investments	10,354	10,354
Other	67	87
Total deferred tax liabilities	54,297	10,541
Long-term deferred tax assets	3,776	622
Long-term deferred tax liabilities	54,211	10,415
Net deferred income tax liabilities	$ 50,435	$ 9,793