Equity-Accounted Investments And Other Long-Term Assets (Carrying Amount Of Equity-Accounted Investments) (Details) - USD ($) $ in Thousands	Mar. 31, 2021	Dec. 31, 2020	Jun. 30, 2020		Mar. 31, 2020	Dec. 31, 2019	Jun. 30, 2019
Schedule of Equity Method Investments [Line Items]
As reported, beginning of period	$ 274,405	$ 285,261	$ 290,213	[1]	$ 256,955	$ 318,473	$ 317,342
Loans	57,068		78,486	[1]
TOTAL LIABILITIES, REDEEMABLE COMMON STOCK AND SHAREHOLDERS' EQUITY	416,452		453,678	[1]
Nonconsolidated Investee or Group of Investees [Member]
Schedule of Equity Method Investments [Line Items]
As reported, beginning of period	18,857		65,216
Loans	1,000		620
TOTAL LIABILITIES, REDEEMABLE COMMON STOCK AND SHAREHOLDERS' EQUITY	$ 19,857		$ 65,836

[1] Derived from audited financial statements.