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Revenue Recognition (Details) - Schedule of revenues disaggregated by geographic region - USD ($) $ in Thousands | 3 Months Ended | 6 Months Ended
--- | --- | ---
Jan. 31, 2021 | Jan. 31, 2020 | Jan. 31, 2021 | Jan. 31, 2020
Revenue Recognition (Details) - Schedule of revenues disaggregated by geographic region [Line Items] |  |  |  |
Revenues, Total | $ 339,766 | $ 323,890 | $ 683,191 | $ 664,089
Outside the United States: |  |  |  |
Total outside the United States | 50,274 | 104,325 | 97,899 | 217,382
Fintech [Member] |  |  |  |
Revenue Recognition (Details) - Schedule of revenues disaggregated by geographic region [Line Items] |  |  |  |
Revenues, Total | 18,497 | 9,741 | 38,585 | 19,298
Outside the United States: |  |  |  |
Total outside the United States |  |  |  |
net2phone- UCaaS [Member] |  |  |  |
Revenue Recognition (Details) - Schedule of revenues disaggregated by geographic region [Line Items] |  |  |  |
Revenues, Total | 10,738 | 7,915 | 20,366 | 15,122
Outside the United States: |  |  |  |
Total outside the United States | 5,061 | 4,220 | 9,608 | 8,155
Traditional Communications [Member] |  |  |  |
Revenue Recognition (Details) - Schedule of revenues disaggregated by geographic region [Line Items] |  |  |  |
Revenues, Total | 310,531 | 306,234 | 624,240 | 629,669
Outside the United States: |  |  |  |
Total outside the United States | 45,213 | 100,105 | 88,291 | 209,227
United States [Member] |  |  |  |
Revenue Recognition (Details) - Schedule of revenues disaggregated by geographic region [Line Items] |  |  |  |
Revenues, Total | 289,492 | 219,565 | 585,292 | 446,707
United States [Member] | Fintech [Member] |  |  |  |
Revenue Recognition (Details) - Schedule of revenues disaggregated by geographic region [Line Items] |  |  |  |
Revenues, Total | 18,497 | 9,741 | 38,585 | 19,298
United States [Member] | net2phone- UCaaS [Member] |  |  |  |
Revenue Recognition (Details) - Schedule of revenues disaggregated by geographic region [Line Items] |  |  |  |
Revenues, Total | 5,677 | 3,695 | 10,758 | 6,967
United States [Member] | Traditional Communications [Member] |  |  |  |
Revenue Recognition (Details) - Schedule of revenues disaggregated by geographic region [Line Items] |  |  |  |
Revenues, Total | 265,318 | 206,129 | 535,949 | 420,442
United Kingdom [Member] |  |  |  |
Outside the United States: |  |  |  |
Total outside the United States | 31,929 | 36,154 | 61,350 | 71,950
United Kingdom [Member] | Fintech [Member] |  |  |  |
Outside the United States: |  |  |  |
Total outside the United States |  |  |  |
United Kingdom [Member] | net2phone- UCaaS [Member] |  |  |  |
Outside the United States: |  |  |  |
Total outside the United States |  | 3 |  | 7
United Kingdom [Member] | Traditional Communications [Member] |  |  |  |
Outside the United States: |  |  |  |
Total outside the United States | 31,929 | 36,151 | 61,350 | 71,943
Netherlands [Member] |  |  |  |
Outside the United States: |  |  |  |
Total outside the United States | 5 | 49,692 | 7 | 104,634
Netherlands [Member] | Fintech [Member] |  |  |  |
Outside the United States: |  |  |  |
Total outside the United States |  |  |  |
Netherlands [Member] | net2phone- UCaaS [Member] |  |  |  |
Outside the United States: |  |  |  |
Total outside the United States |  |  |  |
Netherlands [Member] | Traditional Communications [Member] |  |  |  |
Outside the United States: |  |  |  |
Total outside the United States | 5 | 49,692 | 7 | 104,634
Other [Member] |  |  |  |
Outside the United States: |  |  |  |
Total outside the United States | 18,340 | 18,479 | 36,542 | 40,798
Other [Member] | Fintech [Member] |  |  |  |
Outside the United States: |  |  |  |
Total outside the United States |  |  |  |
Other [Member] | net2phone- UCaaS [Member] |  |  |  |
Outside the United States: |  |  |  |
Total outside the United States | 5,061 | 4,217 | 9,608 | 8,148
Other [Member] | Traditional Communications [Member] |  |  |  |
Outside the United States: |  |  |  |
Total outside the United States | $ 13,279 | $ 14,262 | $ 26,934 | $ 32,650

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