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Equity Investments (Schedule Of Reconciliation Of Changes In Equity Investments) (Details) - USD ($)
$ in Thousands
3 Months Ended
Sep. 30, 2018
Sep. 30, 2017
Equity Investments [Abstract]    
Balance at the beginning of the period $ 41,226 $ 38,324
Investments 2,467 3,225
Impairment of equity investments (1,711) (962)
Balance at the end of the period $ 41,982 $ 40,587