SEGMENT INFORMATION, REVENUES BY GEOGRAPHY AND SIGNIFICANT CUSTOMERS - Revenues by geography (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 Information [Line Items] |
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|
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|
|
|
| Total revenues |
$ 315,522
|
$ 337,417
|
$ 308,284
|
$ 323,277
|
$ 286,641
|
$ 284,911
|
$ 307,276
|
$ 282,905
|
$ 1,284,500
|
$ 1,161,733
|
$ 1,016,861
|
| Revenue |
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| Segment Reporting Information [Line Items] |
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| Percentage of revenues |
|
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|
|
|
|
|
|
100.00%
|
100.00%
|
100.00%
|
| Service Provider Technology |
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|
|
| Segment Reporting Information [Line Items] |
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| Total revenues |
|
|
|
|
|
|
|
|
$ 442,023
|
$ 428,490
|
$ 446,600
|
| Service Provider Technology | Revenue |
|
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|
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| Segment Reporting Information [Line Items] |
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| Percentage of revenues |
|
|
|
|
|
|
|
|
34.00%
|
37.00%
|
44.00%
|
| United States |
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| Segment Reporting Information [Line Items] |
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| Total revenues |
|
|
|
|
|
|
|
|
$ 539,000
|
$ 469,800
|
$ 390,600
|
| Geographical location | North America |
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| Segment Reporting Information [Line Items] |
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|
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| Total revenues |
|
|
|
|
|
|
|
|
$ 571,901
|
$ 497,218
|
$ 410,378
|
| Geographical location | North America | Revenue |
|
|
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|
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|
|
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| Segment Reporting Information [Line Items] |
|
|
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|
|
|
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| Percentage of revenues |
|
|
|
|
|
|
|
|
45.00%
|
43.00%
|
40.00%
|
| Geographical location | Europe, the Middle East and Africa |
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|
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|
|
|
|
|
| Segment Reporting Information [Line Items] |
|
|
|
|
|
|
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|
|
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| Total revenues |
|
|
|
|
|
|
|
|
$ 517,132
|
$ 477,332
|
$ 411,388
|
| Geographical location | Europe, the Middle East and Africa | Revenue |
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|
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|
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| Segment Reporting Information [Line Items] |
|
|
|
|
|
|
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|
|
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| Percentage of revenues |
|
|
|
|
|
|
|
|
40.00%
|
41.00%
|
41.00%
|
| Geographical location | Europe, the Middle East and Africa (EMEA) |
|
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| Segment Reporting Information [Line Items] |
|
|
|
|
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|
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| Total revenues |
|
|
|
|
|
|
|
|
$ 112,121
|
$ 108,460
|
$ 102,844
|
| Geographical location | Europe, the Middle East and Africa (EMEA) | Revenue |
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| Segment Reporting Information [Line Items] |
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| Percentage of revenues |
|
|
|
|
|
|
|
|
9.00%
|
9.00%
|
10.00%
|
| Geographical location | South America |
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| Segment Reporting Information [Line Items] |
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| Total revenues |
|
|
|
|
|
|
|
|
$ 83,346
|
$ 78,723
|
$ 92,251
|
| Geographical location | South America | Revenue |
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| Segment Reporting Information [Line Items] |
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|
|
|
|
|
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| Percentage of revenues |
|
|
|
|
|
|
|
|
6.00%
|
7.00%
|
9.00%
|