Reinsurance Assets And Policyholder Liabilities Under Insurance And Investment Contracts (Summary Of The Movement In Reinsurance Assets And Policyholder Liabilities Under Insurance Contracts) (Details) $ in Thousands	3 Months Ended
	Sep. 30, 2018 USD ($)
Reinsurance Assets And Policyholder Liabilities Under Insurance And Investment Contracts [Abstract]
Reinsurance assets, Beginning Balance	$ 633	[1]
Reinsurance assets, Increase in policyholder benefits under insurance contracts	169	[1]
Reinsurance assets, Claims and policyholders' benefits under insurance contracts	(164)	[1]
Reinsurance assets, Foreign currency adjustment	(19)	[1],[2]
Reinsurance assets, Ending Balance	619	[1]
Insurance contracts, Beginning Balance	(2,032)	[3]
Insurance contracts, Increase in policyholder benefits under insurance contracts	(2,901)	[3]
Insurance contracts, Claims and policyholders' benefits under insurance contracts	2,690	[3]
Insurance contracts, Foreign currency adjustment	61	[2],[3]
Insurance contracts, Ending Balance	$ (2,182)	[3]

[1] Included in other long-term assets.

[2] Represents the effects of the fluctuations between the ZAR and the U.S. dollar.

[3] Included in other long-term liabilities.