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GOODWILL AND PURCHASED INTANGIBLE ASSETS - Additional Information (Details) | 3 Months Ended | 6 Months Ended | 9 Months Ended
--- | --- | --- | ---
Jun. 30, 2020 USD ($) | Dec. 31, 2020 segment reporting_unit | Mar. 31, 2020 USD ($)
Goodwill [Line Items] |  |  |
Number of reportable segments | segment |  | 4 |
Number of reporting units | reporting_unit |  | 6 |
Impairment of intangible assets |  |  | $ 0
Specialty Semiconductor Process |  |  |
Goodwill [Line Items] |  |  |
Goodwill impairment | $ 144,200,000 |  |
PCB and Display |  |  |
Goodwill [Line Items] |  |  |
Goodwill impairment | $ 112,500,000 |  |

X
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