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Intangible Assets | 9 Months Ended
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Apr. 30, 2015
Finite-Lived Intangible Assets, Net [Abstract] |
Intangible Assets | Intangible Assets Intangible assets with finite lives as of April 30, 2015 and July 31, 2014 are as follows:
|  | April 30, 2015
|  | Weighted Average Amortization Period |  | Gross Carrying Amount |  | Accumulated Amortization |  | Net Carrying Amount
Technologies |  | 11.8 |  | $ | 47,370,000 |  |  | 38,533,000 |  |  | $ | 8,837,000 |
Customer relationships |  | 10.0 |  | 29,831,000 |  |  | 20,244,000 |  |  | 9,587,000 |
Trademarks and other |  | 20.0 |  | 5,794,000 |  |  | 2,680,000 |  |  | 3,114,000 |
Total |  |  |  | $ | 82,995,000 |  |  | 61,457,000 |  |  | $ | 21,538,000 |
|  | July 31, 2014
|  | Weighted Average Amortization Period |  | Gross Carrying Amount |  | Accumulated Amortization |  | Net Carrying Amount
Technologies |  | 11.8 |  | $ | 47,370,000 |  |  | 36,240,000 |  |  | $ | 11,130,000 |
Customer relationships |  | 10.0 |  | 29,831,000 |  |  | 18,031,000 |  |  | 11,800,000 |
Trademarks and other |  | 20.0 |  | 5,794,000 |  |  | 2,504,000 |  |  | 3,290,000 |
Total |  |  |  | $ | 82,995,000 |  |  | 56,775,000 |  |  | $ | 26,220,000 |
The weighted average amortization period in the above table excludes fully amortized intangible assets. Amortization expense for the three months ended April 30, 2015 and 2014 was $1,561,000 and $1,560,000, respectively. Amortization expense for the nine months ended April 30, 2015 and 2014 was $4,682,000 and $4,724,000, respectively. The estimated amortization expense for the fiscal years ending July 31, 2015, 2016, 2017, 2018, and 2019 is $6,211,000, $4,962,000, $4,782,000, $4,782,000 and $862,000, respectively.

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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 2 -URI http://asc.fasb.org/extlink&oid=26713463&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 -URI http://asc.fasb.org/extlink&oid=26713463&loc=d3e16265-109275 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=26713463&loc=d3e16373-109275 + Details
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