SEGMENT REPORTING AND GEOGRAPHIC INFORMATION (Tables)
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3 Months Ended | 
Sep. 30, 2020  | 
| Segment Reporting [Abstract] | 
 
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| Summary of Results for Reportable Segments | 
 The following is a summary of results for each of our four reportable segments for the indicated periods: 
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Three Months Ended | 
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|   | 
September 30, | 
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| (In thousands) | 
2020 | 
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2019 | 
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| Semiconductor Process Control: | 
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| Revenue | 
$ | 
1,267,954  | 
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$ | 
1,163,632  | 
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| Segment gross margin | 
814,810  | 
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742,342  | 
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| Specialty Semiconductor Process: | 
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| Revenue | 
88,954  | 
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69,139  | 
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| Segment gross margin | 
49,928  | 
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38,164  | 
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| PCB, Display and Component Inspection: | 
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| Revenue | 
181,177  | 
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178,552  | 
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| Segment gross margin | 
90,169  | 
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76,068  | 
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| Other: | 
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| Revenue | 
140  | 
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2,231  | 
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| Segment gross margin | 
13  | 
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653  | 
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| Totals: | 
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| Revenue | 
$ | 
1,538,225  | 
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$ | 
1,413,554  | 
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| Segment gross margin | 
$ | 
954,920  | 
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$ | 
857,227  | 
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| Reconciliation of Total Reportable Segments Revenue to Total Revenue | 
 The following table reconciles total reportable segment revenue to total revenue for the indicated periods: 
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Three Months Ended | 
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|   | 
September 30, | 
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| (In thousands) | 
2020 | 
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2019 | 
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| Total revenue for reportable segments | 
$ | 
1,538,225  | 
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$ | 
1,413,554  | 
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| Corporate allocations and effects of foreign exchange rates | 
395  | 
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(140) | 
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| Total revenue | 
$ | 
1,538,620  | 
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$ | 
1,413,414  | 
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| Reconciliation of Total Segment Gross Margin to Total Income Before Income Taxes | 
 The following table reconciles total segment gross margin to total income before income taxes for the indicated periods: 
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Three Months Ended | 
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|   | 
September 30, | 
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| (In thousands) | 
2020 | 
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2019 | 
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| Total segment gross margin  | 
$ | 
954,920  | 
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$ | 
857,227  | 
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Acquisition-related charges, corporate allocations, and effects of foreign exchange rates(1)
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36,862  | 
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48,054  | 
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| Research and development | 
219,038  | 
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210,580  | 
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| Selling, general and administrative | 
172,631  | 
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188,345  | 
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| Interest expense | 
39,386  | 
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40,350  | 
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| Other expense (income), net | 
3,197  | 
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(1,618) | 
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| Income before income taxes | 
$ | 
483,806  | 
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$ | 
371,516  | 
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__________________ (1)Acquisition-related charges primarily include amortization of intangible assets and amortization of inventory fair value adjustments 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 September 30, | 
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| 2020 | 
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2019 | 
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| Revenues: | 
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| China | 
$ | 
486,089  | 
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32  | 
% | 
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$ | 
345,856  | 
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24  | 
% | 
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| Taiwan | 
369,100  | 
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24  | 
% | 
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386,729  | 
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27  | 
% | 
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| Korea | 
189,518  | 
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12  | 
% | 
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197,450  | 
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14  | 
% | 
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| North America | 
170,176  | 
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11  | 
% | 
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181,983  | 
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13  | 
% | 
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| Japan | 
164,419  | 
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11  | 
% | 
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206,211  | 
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15  | 
% | 
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| Europe and Israel | 
83,117  | 
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5  | 
% | 
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59,383  | 
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4  | 
% | 
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| Rest of Asia | 
76,201  | 
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5  | 
% | 
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35,802  | 
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3  | 
% | 
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| Total | 
$ | 
1,538,620  | 
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100  | 
% | 
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$ | 
1,413,414  | 
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100  | 
% | 
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| Schedule of Revenues by Major Products | 
 The following is a summary of revenues by major products for the indicated periods: 
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| (Dollar amounts in thousands) | 
Three Months Ended September 30, | 
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| 2020 | 
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2019 | 
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| Revenues: | 
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| Wafer Inspection | 
$ | 
519,551  | 
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34  | 
% | 
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$ | 
448,274  | 
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32  | 
% | 
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| Patterning | 
370,932  | 
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24  | 
% | 
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382,658  | 
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27  | 
% | 
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| Specialty Semiconductor Process | 
74,027  | 
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5  | 
% | 
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56,870  | 
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4  | 
% | 
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| PCB, Display and Component Inspection | 
120,626  | 
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8  | 
% | 
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120,360  | 
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9  | 
% | 
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| Services | 
393,125  | 
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26  | 
% | 
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355,439  | 
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25  | 
% | 
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| Other | 
60,359  | 
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3  | 
% | 
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49,813  | 
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3  | 
% | 
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| Total | 
$ | 
1,538,620  | 
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100  | 
% | 
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$ | 
1,413,414  | 
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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) | 
September 30, 2020 | 
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June 30, 2020 | 
 
| Land, property and equipment, net: | 
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| United States | 
$ | 
371,987  | 
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$ | 
329,558  | 
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| Israel | 
57,830  | 
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59,162  | 
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| Singapore | 
56,858  | 
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54,946  | 
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| Europe | 
56,594  | 
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58,065  | 
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| Rest of Asia | 
18,583  | 
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18,093  | 
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| Total | 
$ | 
561,852  | 
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$ | 
519,824  | 
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