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Intangible Assets | 6 Months Ended
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Jan. 31, 2017
Finite-Lived Intangible Assets, Net [Abstract] |
Intangible Assets | Intangible Assets 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 |
The weighted average amortization period in the above table excludes fully amortized intangible assets. Amortization expense for the three months ended January 31, 2017 and 2016 was $6,032,000 and $1,196,000, respectively. Amortization expense for the six months ended January 31, 2017 and 2016 was $12,087,000 and $2,572,000, respectively. Intangible assets at January 31, 2017, and the associated amortization expense for the three and six months ended January 31, 2017, include the impact of the TCS acquisition which closed on February 23, 2016 and which is further discussed in Note (2) - "Acquisition." 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 The entire disclosure for all or part of the information related to 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 1 -URI http://asc.fasb.org/extlink&oid=66006027&loc=d3e16265-109275 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 30 -Section 50 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=66006027&loc=d3e16323-109275 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 30 -Section 50 -Paragraph 3 -URI http://asc.fasb.org/extlink&oid=66006027&loc=d3e16373-109275 + Details
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