Annual report pursuant to Section 13 and 15(d)

GOODWILL AND PURCHASED INTANGIBLE ASSETS - Narrative (Details)

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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