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Intangible Assets (Tables) | 6 Months Ended
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Jan. 31, 2017
Finite-Lived Intangible Assets, Net [Abstract] |
Intangible assets with finite lives | Intangible assets with finite lives are as follows:
|  | As of January 31, 2017
|  | Weighted Average Amortization Period |  | Gross Carrying Amount |  | Accumulated Amortization |  | Net Carrying Amount
Customer relationships |  | 20.3 |  | $ | 249,831,000 |  |  | 35,210,000 |  |  | $ | 214,621,000 |
Technologies |  | 12.3 |  | 82,370,000 |  |  | 45,741,000 |  |  | 36,629,000 |
Trademarks and other |  | 16.3 |  | 28,894,000 |  |  | 7,537,000 |  |  | 21,357,000 |
Total |  |  |  | $ | 361,095,000 |  |  | 88,488,000 |  |  | $ | 272,607,000 |
|  | As of July 31, 2016
|  | Weighted Average Amortization Period |  | Gross Carrying Amount |  | Accumulated Amortization |  | Net Carrying Amount
Customer relationships |  | 20.3 |  | $ | 249,831,000 |  |  | 28,497,000 |  |  | $ | 221,334,000 |
Technologies |  | 12.3 |  | 82,370,000 |  |  | 42,860,000 |  |  | 39,510,000 |
Trademarks and other |  | 16.3 |  | 28,894,000 |  |  | 5,044,000 |  |  | 23,850,000 |
Total |  |  |  | $ | 361,095,000 |  |  | 76,401,000 |  |  | $ | 284,694,000 |
Schedule of Finite-Lived Intangible Assets, Future Amortization Expense | The estimated amortization expense consists of the following for the fiscal years ending July 31,:
2017 | $ | 22,823,000 |
2018 | 21,075,000 |
2019 | 17,155,000 |
2020 | 17,155,000 |
2021 | 16,196,000 |

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- Definition Tabular disclosure of assets, excluding financial assets and goodwill, lacking physical substance with a finite life, by either major class or business segment. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 30 -Section 50 -Paragraph 2 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=66006027&loc=d3e16323-109275 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 30 -Section 50 -Paragraph 1 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=66006027&loc=d3e16265-109275 + Details
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- Definition Tabular disclosure of the amount of amortization expense expected to be recorded in succeeding fiscal years for finite-lived intangible assets. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 30 -Section 50 -Paragraph 2 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=66006027&loc=d3e16323-109275 + Details
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