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Segment Reporting and Geographic Information - Revenue from External Customers by Products and Services (Details) - USD ($) $ in Thousands | 3 Months Ended | 12 Months Ended
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Jun. 30, 2018 | Mar. 31, 2018 | Dec. 31, 2017 | Sep. 30, 2017 | Jun. 30, 2017 | Mar. 31, 2017 | Dec. 31, 2016 | Sep. 30, 2016 | Jun. 30, 2018 | Jun. 30, 2017 | Jun. 30, 2016
Revenue from External Customer |  |  |  |  |  |  |  |  |  |  |  |
Revenues |  | $ 1,070,004 | $ 1,021,294 | $ 975,822 | $ 969,581 | $ 938,647 | $ 913,809 | $ 876,885 | $ 750,673 | $ 4,036,701 | $ 3,480,014 | $ 2,984,493
Segment percent of total revenues |  |  |  |  |  |  |  |  |  | 100.00% | 100.00% | 100.00%
Wafer Inspection |  |  |  |  |  |  |  |  |  |  |  |
Revenue from External Customer |  |  |  |  |  |  |  |  |  |  |  |
Revenues |  |  |  |  |  |  |  |  |  | $ 1,731,826 | $ 1,601,190 | $ 1,293,922
Segment percent of total revenues |  |  |  |  |  |  |  |  |  | 43.00% | 46.00% | 43.00%
Patterning |  |  |  |  |  |  |  |  |  |  |  |
Revenue from External Customer |  |  |  |  |  |  |  |  |  |  |  |
Revenues |  |  |  |  |  |  |  |  |  | $ 1,116,022 | $ 917,178 | $ 772,045
Segment percent of total revenues |  |  |  |  |  |  |  |  |  | 28.00% | 26.00% | 26.00%
Global Service and Support |  |  |  |  |  |  |  |  |  |  |  |
Revenue from External Customer |  |  |  |  |  |  |  |  |  |  |  |
Revenues | [1] |  |  |  |  |  |  |  |  | $ 1,090,683 | $ 897,794 | $ 852,151
Segment percent of total revenues | [1] |  |  |  |  |  |  |  |  | 27.00% | 26.00% | 29.00%
Other |  |  |  |  |  |  |  |  |  |  |  |
Revenue from External Customer |  |  |  |  |  |  |  |  |  |  |  |
Revenues |  |  |  |  |  |  |  |  |  | $ 98,170 | $ 63,852 | $ 66,375
Segment percent of total revenues |  |  |  |  |  |  |  |  |  | 2.00% | 2.00% | 2.00%
[1] | The Global Service and Support revenues includes service revenues as presented in the consolidated statements of operations as well as certain product revenues, primarily revenues from the Company’s K-T Pro business.

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