Annual report pursuant to Section 13 and 15(d)

GOODWILL AND PURCHASED INTANGIBLE ASSETS - Additional Information (Details)

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GOODWILL AND PURCHASED INTANGIBLE ASSETS - Additional Information (Details)
$ in Thousands
 3 Months Ended 12 Months Ended
Mar. 31, 2020
USD ($)
Jun. 30, 2021
USD ($)
Jun. 30, 2021
USD ($)
reporting_Unit
Jun. 30, 2021
USD ($)
segment
Jun. 30, 2020
USD ($)
Jun. 30, 2019
USD ($)
Goodwill [Line Items]            
Number of reportable segments     4 4    
Number of operating segments | segment       6    
Goodwill impairment   $ 0     $ 256,649 $ 0
Non-deductible impairment of goodwill   534,200 $ 534,200 $ 534,200 534,200  
Specialty Semiconductor Process            
Goodwill [Line Items]            
Goodwill impairment $ 144,200       144,179  
Non-deductible impairment of goodwill   144,200 144,200 144,200    
PCB and Display            
Goodwill [Line Items]            
Goodwill impairment $ 112,500       112,470  
Non-deductible impairment of goodwill   112,500 112,500 112,500    
Wafer Inspection and Patterning Reporting Unit            
Goodwill [Line Items]            
Goodwill impairment         $ 0  
Non-deductible impairment of goodwill   $ 277,600 $ 277,600 $ 277,600   $ 277,600