SEGMENT REPORTING AND GEOGRAPHIC INFORMATION (Tables)
   | 
6 Months Ended | 
Dec. 31, 2024  | 
| Segment Reporting [Abstract] | 
 
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| Schedule of Results for Reportable Segments | 
 The following is a summary of results for each of our three reportable segments for the indicated periods: 
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|   | 
Three Months Ended December 31, | 
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Six Months Ended December 31, | 
 
| (In thousands) | 
2024 | 
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2023 | 
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2024 | 
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2023 | 
 
| Semiconductor Process Control: | 
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| Revenues | 
$ | 
2,755,743  | 
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$ | 
2,194,079  | 
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$ | 
5,330,894  | 
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$ | 
4,329,557  | 
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| Segment gross profit | 
1,763,077  | 
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1,418,339  | 
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3,379,859  | 
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2,804,868  | 
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| Specialty Semiconductor Process: | 
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| Revenues | 
160,407  | 
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150,065  | 
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288,741  | 
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276,784  | 
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| Segment gross profit | 
81,122  | 
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81,278  | 
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145,616  | 
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150,579  | 
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| PCB and Component Inspection: | 
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| Revenues | 
161,080  | 
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143,032  | 
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299,063  | 
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279,075  | 
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| Segment gross profit | 
55,526  | 
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57,165  | 
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113,063  | 
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96,985  | 
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| Totals: | 
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| Revenues for reportable segments | 
$ | 
3,077,230  | 
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$ | 
2,487,176  | 
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$ | 
5,918,698  | 
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$ | 
4,885,416  | 
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| Segment gross profit | 
$ | 
1,899,725  | 
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$ | 
1,556,782  | 
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$ | 
3,638,538  | 
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$ | 
3,052,432  | 
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| Schedule of Reconciliation of Total Reportable Segments Revenue to Total Revenue | 
 The following table reconciles total reportable segment revenues to total revenues for the indicated periods: 
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|   | 
Three Months Ended December 31, | 
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Six Months Ended December 31, | 
 
| (In thousands) | 
2024 | 
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2023 | 
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2024 | 
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2023 | 
 
| Total revenues for reportable segments | 
$ | 
3,077,230  | 
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$ | 
2,487,176  | 
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$ | 
5,918,698  | 
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$ | 
4,885,416  | 
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| Corporate allocations and effects of changes in foreign currency exchange rates | 
(379) | 
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(450) | 
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(306) | 
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(1,734) | 
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| Total revenues | 
$ | 
3,076,851  | 
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$ | 
2,486,726  | 
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$ | 
5,918,392  | 
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$ | 
4,883,682  | 
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| Schedule of Reconciliation of Total Segment Gross Profit to Income Before Income Taxes | 
 The following table reconciles total segment gross profit to income before income taxes for the indicated periods: 
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|   | 
Three Months Ended December 31, | 
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Six Months Ended December 31, | 
 
| (In thousands) | 
2024 | 
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2023 | 
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2024 | 
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2023 | 
 
| Total segment gross profit | 
$ | 
1,899,725  | 
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$ | 
1,556,782  | 
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$ | 
3,638,538  | 
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$ | 
3,052,432  | 
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Acquisition-related charges, corporate allocations and effects of changes in foreign currency exchange rates(1)
  | 
44,335  | 
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46,802  | 
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89,038  | 
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92,387  | 
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| R&D | 
346,157  | 
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320,418  | 
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669,302  | 
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631,632  | 
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| SG&A | 
267,081  | 
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237,244  | 
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518,123  | 
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476,889  | 
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| Impairment of goodwill and purchased intangible assets | 
239,100  | 
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219,000  | 
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239,100  | 
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219,000  | 
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| Interest expense | 
74,981  | 
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74,202  | 
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157,152  | 
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148,436  | 
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| Other expense (income), net | 
(44,458) | 
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(32,154) | 
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(85,393) | 
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(58,893) | 
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| Income before income taxes | 
$ | 
972,529  | 
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$ | 
691,270  | 
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$ | 
2,051,216  | 
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$ | 
1,542,981  | 
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__________________ 
(1)Acquisition-related charges primarily include amortization of intangible assets and other acquisition-related costs classified or presented as part of costs of revenues.
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| Schedule of Revenues by Geographic Region | 
 The following is a summary of revenues by geographic region, based on ship-to location, for the indicated periods: 
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| (Dollar amounts in thousands) | 
Three Months Ended December 31, | 
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Six Months Ended December 31, | 
 
| 2024 | 
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2023 | 
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2024 | 
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2023 | 
 
| Revenues: | 
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| China | 
$ | 
1,092,525  | 
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36  | 
% | 
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$ | 
1,027,780  | 
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41  | 
% | 
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$ | 
2,290,829  | 
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39  | 
% | 
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$ | 
2,053,724  | 
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42  | 
% | 
 
| Taiwan | 
881,211  | 
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29  | 
% | 
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375,259  | 
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15  | 
% | 
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1,343,202  | 
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23  | 
% | 
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780,602  | 
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16  | 
% | 
 
| Korea | 
357,434  | 
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12  | 
% | 
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310,672  | 
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12  | 
% | 
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596,108  | 
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10  | 
% | 
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530,493  | 
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11  | 
% | 
 
| North America | 
286,191  | 
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9  | 
% | 
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263,613  | 
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11  | 
% | 
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787,134  | 
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13  | 
% | 
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514,326  | 
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10  | 
% | 
 
| Japan | 
228,614  | 
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7  | 
% | 
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297,757  | 
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12  | 
% | 
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417,183  | 
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7  | 
% | 
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525,134  | 
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11  | 
% | 
 
| Europe and Israel | 
134,266  | 
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4  | 
% | 
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123,362  | 
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5  | 
% | 
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279,086  | 
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5  | 
% | 
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291,798  | 
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6  | 
% | 
 
| Rest of Asia | 
96,610  | 
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3  | 
% | 
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88,283  | 
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4  | 
% | 
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204,850  | 
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3  | 
% | 
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187,605  | 
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4  | 
% | 
 
| Total | 
$ | 
3,076,851  | 
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100  | 
% | 
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$ | 
2,486,726  | 
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100  | 
% | 
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$ | 
5,918,392  | 
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100  | 
% | 
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$ | 
4,883,682  | 
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100  | 
% | 
 
  
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| Schedule of Revenues by Major Products | 
 The following is a summary of revenues by major product categories for the indicated periods: 
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| (Dollar amounts in thousands) | 
Three Months Ended December 31, | 
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Six Months Ended December 31, | 
 
| 2024 | 
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2023 | 
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2024 | 
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2023 | 
 
| Revenues: | 
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| Wafer Inspection | 
$ | 
1,562,610  | 
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51  | 
% | 
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$ | 
1,166,484  | 
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47  | 
% | 
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$ | 
2,931,553  | 
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50  | 
% | 
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$ | 
2,176,682  | 
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45  | 
% | 
 
| Patterning | 
530,680  | 
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17  | 
% | 
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430,384  | 
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17  | 
% | 
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1,107,089  | 
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19  | 
% | 
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972,872  | 
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20  | 
% | 
 
| Specialty Semiconductor Process | 
142,987  | 
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5  | 
% | 
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136,278  | 
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6  | 
% | 
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255,789  | 
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4  | 
% | 
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248,381  | 
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5  | 
% | 
 
| PCB and Component Inspection | 
93,327  | 
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3  | 
% | 
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77,298  | 
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3  | 
% | 
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166,235  | 
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3  | 
% | 
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148,462  | 
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3  | 
% | 
 
| Services | 
667,389  | 
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22  | 
% | 
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564,917  | 
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23  | 
% | 
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1,311,541  | 
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22  | 
% | 
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1,125,209  | 
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23  | 
% | 
 
| Other | 
79,858  | 
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2  | 
% | 
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111,365  | 
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4  | 
% | 
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146,185  | 
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2  | 
% | 
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212,076  | 
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4  | 
% | 
 
| Total | 
$ | 
3,076,851  | 
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100  | 
% | 
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$ | 
2,486,726  | 
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100  | 
% | 
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$ | 
5,918,392  | 
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100  | 
% | 
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$ | 
4,883,682  | 
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100  | 
% | 
 
  
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| Schedule of Long-Lived Assets by Geographic Region | 
 
Land, property and equipment, net by geographic region as of the dates indicated below were as follows: 
 
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As of | 
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As of | 
 
| (In thousands) | 
December 31, 2024 | 
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June 30, 2024 | 
 
| Land, property and equipment, net: | 
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| United States | 
$ | 
700,963  | 
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$ | 
689,937  | 
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| Europe | 
218,372  | 
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155,812  | 
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| Singapore | 
147,895  | 
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148,557  | 
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| Israel | 
75,685  | 
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84,279  | 
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| Rest of Asia | 
31,013  | 
 | 
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31,383  | 
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| Total | 
$ | 
1,173,928  | 
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$ | 
1,109,968  | 
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