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Intangible Assets (Tables) | 9 Months Ended
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Apr. 30, 2012
Intangible Assets [Abstract] |
Intangible assets with finite lives |
| April 30, 2012
| Weighted Average Amortization Period |  | Gross Carrying Amount |  | Accumulated Amortization |  | Net Carrying Amount
Technologies | 11.7 |  | $ 47,694,000 |  | 29,535,000 |  | $ 18,159,000
Customer relationships | 10.0 |  | 29,931,000 |  | 11,494,000 |  | 18,437,000
Trademarks and other | 19.8 |  | 6,044,000 |  | 2,207,000 |  | 3,837,000
Total |  |  | $ 83,669,000 |  | 43,236,000 |  | $ 40,433,000
| July 31, 2011
| Weighted Average Amortization Period |  | Gross Carrying Amount |  | Accumulated Amortization |  | Net Carrying Amount
Technologies | 10.2 |  | $ 47,694,000 |  | 27,000,000 |  | $ 20,694,000
Customer relationships | 10.0 |  | 29,931,000 |  | 9,281,000 |  | 20,650,000
Trademarks and other | 18.6 |  | 6,044,000 |  | 1,918,000 |  | 4,126,000
Total |  |  | $ 83,669,000 |  | 38,199,000 |  | $ 45,470,000

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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=7658586&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=7658586&loc=d3e16265-109275 + Details
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