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SEGMENT REPORTING AND GEOGRAPHIC INFORMATION - Schedule of Revenue from External Customers (Details) - USD ($) $ in Thousands | 3 Months Ended | 12 Months Ended
--- | --- | ---
Jun. 30, 2020 | Mar. 31, 2020 | Dec. 31, 2019 | Sep. 30, 2019 | Jun. 30, 2019 | Mar. 31, 2019 | Dec. 31, 2018 | Sep. 30, 2018 | Jun. 30, 2020 | Jun. 30, 2019 | Jun. 30, 2018
Segment Reporting and Geographic Information |  |  |  |  |  |  |  |  |  |  |
Revenues | $ 1,459,593 | $ 1,423,964 | $ 1,509,453 | $ 1,413,414 | $ 1,258,435 | $ 1,097,311 | $ 1,119,898 | $ 1,093,260 | $ 5,806,424 | $ 4,568,904 | $ 4,036,701
Segment percent of total revenues |  |  |  |  |  |  |  |  | 100.00% | 100.00% | 100.00%
Taiwan |  |  |  |  |  |  |  |  |  |  |
Segment Reporting and Geographic Information |  |  |  |  |  |  |  |  |  |  |
Revenues |  |  |  |  |  |  |  |  | $ 1,566,823 | $ 1,105,726 | $ 636,363
Segment percent of total revenues |  |  |  |  |  |  |  |  | 27.00% | 24.00% | 16.00%
China |  |  |  |  |  |  |  |  |  |  |
Segment Reporting and Geographic Information |  |  |  |  |  |  |  |  |  |  |
Revenues |  |  |  |  |  |  |  |  | $ 1,457,579 | $ 1,215,807 | $ 643,033
Segment percent of total revenues |  |  |  |  |  |  |  |  | 25.00% | 27.00% | 16.00%
Korea |  |  |  |  |  |  |  |  |  |  |
Segment Reporting and Geographic Information |  |  |  |  |  |  |  |  |  |  |
Revenues |  |  |  |  |  |  |  |  | $ 982,171 | $ 584,091 | $ 1,178,601
Segment percent of total revenues |  |  |  |  |  |  |  |  | 17.00% | 13.00% | 29.00%
Japan |  |  |  |  |  |  |  |  |  |  |
Segment Reporting and Geographic Information |  |  |  |  |  |  |  |  |  |  |
Revenues |  |  |  |  |  |  |  |  | $ 670,287 | $ 581,529 | $ 638,358
Segment percent of total revenues |  |  |  |  |  |  |  |  | 12.00% | 13.00% | 16.00%
United States |  |  |  |  |  |  |  |  |  |  |
Segment Reporting and Geographic Information |  |  |  |  |  |  |  |  |  |  |
Revenues |  |  |  |  |  |  |  |  | $ 657,550 | $ 596,452 | $ 494,330
Segment percent of total revenues |  |  |  |  |  |  |  |  | 11.00% | 13.00% | 12.00%
Europe and Israel |  |  |  |  |  |  |  |  |  |  |
Segment Reporting and Geographic Information |  |  |  |  |  |  |  |  |  |  |
Revenues |  |  |  |  |  |  |  |  | $ 318,483 | $ 305,924 | $ 300,883
Segment percent of total revenues |  |  |  |  |  |  |  |  | 5.00% | 7.00% | 7.00%
Rest of Asia |  |  |  |  |  |  |  |  |  |  |
Segment Reporting and Geographic Information |  |  |  |  |  |  |  |  |  |  |
Revenues |  |  |  |  |  |  |  |  | $ 153,531 | $ 179,375 | $ 145,133
Segment percent of total revenues |  |  |  |  |  |  |  |  | 3.00% | 3.00% | 4.00%

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