Annual report [Section 13 and 15(d), not S-K Item 405]

GOODWILL AND PURCHASED INTANGIBLE ASSETS - Additional Information (Details)

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GOODWILL AND PURCHASED INTANGIBLE ASSETS - Additional Information (Details)
 3 Months Ended 12 Months Ended
Dec. 31, 2025
USD ($)
Feb. 29, 2024
USD ($)
Dec. 31, 2025
USD ($)
Dec. 31, 2024
USD ($)
Mar. 31, 2024
USD ($)
Dec. 31, 2023
USD ($)
reporting_unit
Jun. 30, 2026
USD ($)
Jun. 30, 2025
USD ($)
Jun. 30, 2024
USD ($)
Goodwill [Line Items]                  
Impairment of goodwill and purchased intangible assets $ 0 $ 0           $ 230,400,000  
Number of reporting units | reporting_unit           2      
Intangible Asset, Finite-Lived, Impairment Loss, Statement of Income or Comprehensive Income [Extensible Enumeration]     Purchased intangible assets, net Purchased intangible assets, net          
Impairment charge     $ 8,700,000 $ 26,400,000          
Impairment of other long-lived assets       0          
Impairment of goodwill and purchased intangible assets       239,100,000   $ 219,000,000.0 $ 0 239,100,000 $ 289,474,000
Impairment of intangible assets             0 0  
Amortization expense             190,800,000 220,400,000 239,300,000
Specialty Semiconductor Process                  
Goodwill [Line Items]                  
Impairment of goodwill and purchased intangible assets       0       0  
Goodwill accumulated impairment loss                 144,200,000
Semiconductor Process Control                  
Goodwill [Line Items]                  
Impairment of goodwill and purchased intangible assets               0  
Goodwill accumulated impairment loss             277,600,000   277,600,000
PCB and Component Inspection                  
Goodwill [Line Items]                  
Impairment of goodwill and purchased intangible assets               $ 230,400,000  
Goodwill accumulated impairment loss             $ 70,500,000   $ 70,500,000
PCB                  
Goodwill [Line Items]                  
Impairment of goodwill and purchased intangible assets       $ 230,400,000          
PCB And Display                  
Goodwill [Line Items]                  
Impairment of goodwill and purchased intangible assets           $ 192,600,000      
PCB And Display | Valuation, Income Approach                  
Goodwill [Line Items]                  
Reporting unit, percentage of fair value             75.00%    
PCB And Display | Valuation, Market Approach                  
Goodwill [Line Items]                  
Reporting unit, percentage of fair value             25.00%    
Display                  
Goodwill [Line Items]                  
Impairment of goodwill and purchased intangible assets         $ 70,500,000