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INVESTMENTS (Details) - Fair Value, Assets Measured on Recurring Basis - USD ($)
$ in Thousands
Dec. 31, 2017
Jun. 30, 2017
Trading securities    
Trading securities, at fair value [1] $ 7,433 $ 9,720
Available-for-sale securities    
Total available-for-sale securities [1],[2] 22,372 3,401
Total Investments 29,805 13,121
Fair Value, Inputs, Level 1 [Member]    
Trading securities    
Trading securities, at fair value 7,433 9,305
Available-for-sale securities    
Total available-for-sale securities 1,569 3,401
Total Investments 9,002 12,706
Fair Value, Inputs, Level 2 [Member]    
Trading securities    
Trading securities, at fair value 0 0
Available-for-sale securities    
Total available-for-sale securities 20,803 0
Total Investments 20,803 0
Fair Value, Inputs, Level 3 [Member]    
Trading securities    
Trading securities, at fair value 0 0
Available-for-sale securities    
Total available-for-sale securities 0 0
Total Investments 0 0
Fixed Income Securities [Member]    
Trading securities    
Trading securities, at fair value [1] 7,061 8,927
Available-for-sale securities    
Total available-for-sale securities [1] 995 1,144
Fixed Income Securities [Member] | Fair Value, Inputs, Level 1 [Member]    
Trading securities    
Trading securities, at fair value 7,061 8,927
Available-for-sale securities    
Total available-for-sale securities 995 1,144
Fixed Income Securities [Member] | Fair Value, Inputs, Level 2 [Member]    
Trading securities    
Trading securities, at fair value 0 0
Available-for-sale securities    
Total available-for-sale securities 0 0
Fixed Income Securities [Member] | Fair Value, Inputs, Level 3 [Member]    
Trading securities    
Trading securities, at fair value 0 0
Available-for-sale securities    
Total available-for-sale securities 0 0
Mutual Funds, Domestic Equity [Member]    
Trading securities    
Trading securities, at fair value [1] 372 378
Available-for-sale securities    
Total available-for-sale securities [1] 416 406
Mutual Funds, Domestic Equity [Member] | Fair Value, Inputs, Level 1 [Member]    
Trading securities    
Trading securities, at fair value 372 378
Available-for-sale securities    
Total available-for-sale securities 416 406
Mutual Funds, Domestic Equity [Member] | Fair Value, Inputs, Level 2 [Member]    
Trading securities    
Trading securities, at fair value 0 0
Available-for-sale securities    
Total available-for-sale securities 0 0
Mutual Funds, Domestic Equity [Member] | Fair Value, Inputs, Level 3 [Member]    
Trading securities    
Trading securities, at fair value 0 0
Available-for-sale securities    
Total available-for-sale securities 0 0
Other Securities [Member]    
Trading securities    
Trading securities, at fair value [1] 0 0
Available-for-sale securities    
Total available-for-sale securities [1] 0 66
Other Securities [Member] | Fair Value, Inputs, Level 1 [Member]    
Trading securities    
Trading securities, at fair value 0 0
Available-for-sale securities    
Total available-for-sale securities 0 66
Other Securities [Member] | Fair Value, Inputs, Level 2 [Member]    
Trading securities    
Trading securities, at fair value 0 0
Available-for-sale securities    
Total available-for-sale securities 0 0
Other Securities [Member] | Fair Value, Inputs, Level 3 [Member]    
Trading securities    
Trading securities, at fair value 0 0
Available-for-sale securities    
Total available-for-sale securities 0 0
Offshore Fund [Member]    
Trading securities    
Trading securities, at fair value [1],[3] 0 415
Common Stock - Domestic [Member]    
Available-for-sale securities    
Total available-for-sale securities [1] 0 113
Common Stock - Domestic [Member] | Fair Value, Inputs, Level 1 [Member]    
Available-for-sale securities    
Total available-for-sale securities 0 113
Common Stock - Domestic [Member] | Fair Value, Inputs, Level 2 [Member]    
Available-for-sale securities    
Total available-for-sale securities 0 0
Common Stock - Domestic [Member] | Fair Value, Inputs, Level 3 [Member]    
Available-for-sale securities    
Total available-for-sale securities 0 0
Common Stock - International [Member]    
Available-for-sale securities    
Total available-for-sale securities [1] 19,258 203
Common Stock - International [Member] | Fair Value, Inputs, Level 1 [Member]    
Available-for-sale securities    
Total available-for-sale securities 158 203
Common Stock - International [Member] | Fair Value, Inputs, Level 2 [Member]    
Available-for-sale securities    
Total available-for-sale securities 19,100 0
Common Stock - International [Member] | Fair Value, Inputs, Level 3 [Member]    
Available-for-sale securities    
Total available-for-sale securities 0 0
Corporate Debt Securities [Member]    
Available-for-sale securities    
Total available-for-sale securities [1],[4] 1,703 1,469
Corporate Debt Securities [Member] | Fair Value, Inputs, Level 1 [Member]    
Available-for-sale securities    
Total available-for-sale securities 0 1,469
Corporate Debt Securities [Member] | Fair Value, Inputs, Level 2 [Member]    
Available-for-sale securities    
Total available-for-sale securities 1,703 0
Corporate Debt Securities [Member] | Fair Value, Inputs, Level 3 [Member]    
Available-for-sale securities    
Total available-for-sale securities $ 0 $ 0
[1] Unrealized and realized gains and losses on trading securities are included in earnings in the statement of operations.
[2] Net unrealized gains (losses) on available-for-sale securities gross and net of tax as of December 31, 2017, are $17,353 and $13,847, respectively, and as of June 30, 2017, are $461 and $461, respectively.
[3] In accordance with Subtopic 820-10, certain investments that are measured at fair value using the net asset value per share (or its equivalent) practical expedient have not been classified in the fair value hierarchy. The fair value amounts presented in this table are intended to permit reconciliation of the fair value hierarchy to the amounts presented in the Consolidated Balance Sheets.
[4] Corporate debt matures in 2024.