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INVESTMENTS (Details) - Investment Income (Loss) Reflected in Earnings - USD ($)
$ in Thousands
12 Months Ended
Jun. 30, 2018
Jun. 30, 2017
Investments Debt And Equity Securities Abstract    
Realized gains on sales of available-for-sale securities $ 669 $ 31
Realized losses on sales of trading securities (736) 0
Unrealized gains on trading securities 742 15
Realized foreign currency losses (59) (37)
Other-than-temporary declines in available-for-sale securities 0 (411)
Other-than-temporary declines in securities held at cost 0 (72)
Dividend and interest income 888 820
Total Investment Income $ 1,504 $ 346