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GOODWILL AND PURCHASED INTANGIBLE ASSETS - Narrative (Details) - USD ($) $ in Thousands | 3 Months Ended | 12 Months Ended
--- | --- | ---
Mar. 31, 2020 | Jun. 30, 2020 | Jun. 30, 2019 | Jun. 30, 2018
Goodwill |  |  |  |
Goodwill impairment |  | $ 256,649 | $ 0 | $ 0
Income valuation approach, percent |  | 7500.00% |  |
Market valuation approach, percent |  | 2500.00% |  |
Non-deductible impairment of goodwill |  | $ 534,200 | $ 277,600 | 277,600
Specialty Semiconductor Process |  |  |  |
Goodwill |  |  |  |
Goodwill impairment | $ 144,200 | 144,179 |  |
Non-deductible impairment of goodwill |  | 144,200 |  |
PCB and Display |  |  |  |
Goodwill |  |  |  |
Goodwill impairment | $ 112,500 | 112,470 |  |
Non-deductible impairment of goodwill |  | 112,500 |  |
Wafer Inspection |  |  |  |
Goodwill |  |  |  |
Goodwill impairment |  | 0 |  |
Non-deductible impairment of goodwill |  | 277,600 |  | 1,000
Patterning |  |  |  |
Goodwill |  |  |  |
Goodwill impairment |  | 0 |  |
Non-deductible impairment of goodwill |  | $ 277,600 |  | $ 276,600

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