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INVESTMENTS (Details) - Components of Company's Trading and Available-for-Sale Investments - USD ($) $ in Thousands | Dec. 31, 2017 | Jun. 30, 2017
--- | --- | ---
Trading securities1 |  |  |
Trading, cost | [1] | $ 7,615 | $ 10,648
Trading, gross unrealized gain | [1] | 26 | 50
Trading, gross unrealized (losses) | [1] | (208) | (978)
Trading, fair value | [1] | 7,433 | 9,720
Available-for-sale securities2 |  |  |
Available-for-sale, cost | [1],[2] | 5,019 | 2,940
Available-for-sale, gross unrealized gain | [1],[2] | 17,358 | 466
Available-for-sale, gross unrealized (losses) | [1],[2] | (5) | (5)
Available-for-sale, fair value | [1],[2] | 22,372 | 3,401
Total securities at fair value, cost |  | 12,634 | 13,588
Total securities at fair value, gross unrealized gain |  | 17,384 | 516
Total securities at fair value, gross unrealized (losses) |  | (213) | (983)
Total securities at fair value, fair value |  | 29,805 | 13,121
Fixed Income Securities [Member] |  |  |
Trading securities1 |  |  |
Trading, cost | [1] | 7,035 | 8,884
Trading, gross unrealized gain | [1] | 26 | 50
Trading, gross unrealized (losses) | [1] | 0 | (7)
Trading, fair value | [1] | 7,061 | 8,927
Available-for-sale securities2 |  |  |
Available-for-sale, cost | [1] | 1,000 | 1,148
Available-for-sale, gross unrealized gain | [1] | 0 | 1
Available-for-sale, gross unrealized (losses) | [1] | (5) | (5)
Available-for-sale, fair value | [1] | 995 | 1,144
Mutual Funds, Domestic Equity [Member] |  |  |
Trading securities1 |  |  |
Trading, cost | [1] | 535 | 535
Trading, gross unrealized gain | [1] | 0 | 0
Trading, gross unrealized (losses) | [1] | (163) | (157)
Trading, fair value | [1] | 372 | 378
Available-for-sale securities2 |  |  |
Available-for-sale, cost | [1] | 394 | 394
Available-for-sale, gross unrealized gain | [1] | 22 | 12
Available-for-sale, gross unrealized (losses) | [1] | 0 | 0
Available-for-sale, fair value | [1] | 416 | 406
Other Securities [Member] |  |  |
Trading securities1 |  |  |
Trading, cost | [1] | 45 | 45
Trading, gross unrealized gain | [1] | 0 | 0
Trading, gross unrealized (losses) | [1] | (45) | (45)
Trading, fair value | [1] | 0 | 0
Available-for-sale securities2 |  |  |
Available-for-sale, cost | [1] | 0 | 56
Available-for-sale, gross unrealized gain | [1] | 0 | 10
Available-for-sale, gross unrealized (losses) | [1] | 0 | 0
Available-for-sale, fair value | [1] | 0 | 66
Offshore Fund [Member] |  |  |
Trading securities1 |  |  |
Trading, cost | [1] | 0 | 1,184
Trading, gross unrealized gain | [1] | 0 | 0
Trading, gross unrealized (losses) | [1] | 0 | (769)
Trading, fair value | [1],[3] | 0 | 415
Common Stock - Domestic [Member] |  |  |
Available-for-sale securities2 |  |  |
Available-for-sale, cost | [1] | 0 | 109
Available-for-sale, gross unrealized gain | [1] | 0 | 4
Available-for-sale, gross unrealized (losses) | [1] | 0 | 0
Available-for-sale, fair value | [1] | 0 | 113
Common Stock - International [Member] |  |  |
Available-for-sale securities2 |  |  |
Available-for-sale, cost | [1] | 2,554 | 191
Available-for-sale, gross unrealized gain | [1] | 16,704 | 12
Available-for-sale, gross unrealized (losses) | [1] | 0 | 0
Available-for-sale, fair value | [1] | 19,258 | 203
Corporate Debt Securities [Member] |  |  |
Available-for-sale securities2 |  |  |
Available-for-sale, cost | [1],[4] | 1,071 | 1,042
Available-for-sale, gross unrealized gain | [1],[4] | 632 | 427
Available-for-sale, gross unrealized (losses) | [1],[4] | 0 | 0
Available-for-sale, fair value | [1],[4] | $ 1,703 | $ 1,469
[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.

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