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Investments (Narrative) (Details) - USD ($) $ in Thousands | 3 Months Ended | 6 Months Ended |
--- | --- | --- | ---
Dec. 31, 2020 | Dec. 31, 2019 | Dec. 31, 2020 | Dec. 31, 2019 | Jun. 30, 2020
Investments [Abstract] |  |  |  |  |
Net unrealized gains (losses) | $ (3,700) | $ (2,800) | $ 4,800 | $ (5,400) |
Aggregate carrying amount of equity investments | 21,410 |  | 21,410 |  | $ 30,033
Impairment losses related to equity investments |  |  | (4,776) | $ 5,419 |
Carrying value of equity method investments | $ 21,681 |  | $ 21,681 |  | $ 14,109

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