| 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 | 
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- Definition Amount of loss from the write-down of an asset representing the future economic benefits arising from other assets acquired in a business combination that are not individually identified and separately recognized. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef 
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- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. No definition available. 
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- Definition The amount of impairment loss recognized in the period resulting from the write-down of the carrying amount of an intangible asset (excluding goodwill) to fair value. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef 
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- Definition Number of segments reported by the entity. A reportable segment is a component of an entity for which there is an accounting requirement to report separate financial information on that component in the entity's financial statements. Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef 
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- Definition Number of reporting units tested for impairment of goodwill. A reporting unit is an operating segment or one level below an operating segment. No definition available. 
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- Details 
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- Details 
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