Fair Value Of Financial Instruments (Fair Value Of Assets And Liabilities Measured On Recurring Basis) (Details) - Recurring [Member] - USD ($) $ in Thousands	Dec. 31, 2019	Jun. 30, 2019	Dec. 31, 2018	Jun. 30, 2018
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Investment in Cell C	$ 0	$ 0
Cash, cash equivalents and restricted cash (included in other long term assets)	587	619
Fixed maturity investments (included in cash and cash equivalents)	2,845	5,201
Other	414	413
Total assets at fair value	3,846	6,233
Quoted Price In Active Markets For Identical Assets (Level 1) [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Cash, cash equivalents and restricted cash (included in other long term assets)	587	619
Fixed maturity investments (included in cash and cash equivalents)	2,845	5,201
Total assets at fair value	3,432	5,820
Significant Other Observable Inputs (Level 2) [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Other	414	413
Total assets at fair value	414	413
Significant Unobservable Inputs (Level 3) [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Investment in Cell C	0	0
Total assets at fair value	$ 0	$ 0	$ 149,058	$ 172,948