| Intangible assets with finite lives |
Intangible assets with finite lives as of January 31, 2016 and July 31, 2015 are as follows: | | | | | | | | | | | | | | | | | January 31, 2016 | | | Weighted Average Amortization Period | | Gross Carrying Amount | | Accumulated Amortization | | Net Carrying Amount | Technologies | | 13.0 | | $ | 47,370,000 |
| | 40,245,000 |
| | $ | 7,125,000 |
| Customer relationships | | 10.0 | | 29,831,000 |
| | 22,456,000 |
| | 7,375,000 |
| Trademarks and other | | 20.0 | | 5,794,000 |
| | 2,857,000 |
| | 2,937,000 |
| Total | | | | $ | 82,995,000 |
| | 65,558,000 |
| | $ | 17,437,000 |
|
| | | | | | | | | | | | | | | | | July 31, 2015 | | | Weighted Average Amortization Period | | Gross Carrying Amount | | Accumulated Amortization | | Net Carrying Amount | Technologies | | 12.1 | | $ | 47,370,000 |
| | 39,266,000 |
| | $ | 8,104,000 |
| Customer relationships | | 10.0 | | 29,831,000 |
| | 20,981,000 |
| | 8,850,000 |
| Trademarks and other | | 20.0 | | 5,794,000 |
| | 2,739,000 |
| | 3,055,000 |
| Total | | | | $ | 82,995,000 |
| | 62,986,000 |
| | $ | 20,009,000 |
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