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Goodwill and Intangible Assets (Tables) | 9 Months Ended
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Apr. 30, 2016
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Changes in Carrying Amount of Goodwill | Changes in the carrying amount of goodwill for the nine months ended April 30, 2016, were as follows:
| IDS |  | WPS |  | Total
Balance as of July 31, 2015 | $ | 382,786 |  |  | $ | 50,413 |  |  | $ | 433,199 |
Translation adjustments | 4,128 |  |  | (1,136 | ) |  | $ | 2,992 |
Balance as of April 30, 2016 | $ | 386,914 |  |  | $ | 49,277 |  |  | $ | 436,191 |
Other Intangible Assets | The net book value of these assets was as follows:
| April 30, 2016 |  | July 31, 2015
| Weighted Average Amortization Period (Years) |  | Gross Carrying Amount |  | Accumulated Amortization |  | Net Book Value |  | Weighted Average Amortization Period (Years) |  | Gross Carrying Amount |  | Accumulated Amortization |  | Net Book Value
Amortized other intangible assets: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Patents | 5 |  | $ | 12,218 |  |  | $ | (10,989 | ) |  | $ | 1,229 |  |  | 5 |  | $ | 12,073 |  |  | $ | (10,641 | ) |  | $ | 1,432 |
Trademarks and other | 5 |  | 14,459 |  |  | (13,713 | ) |  | 746 |  |  | 5 |  | 14,375 |  |  | (12,471 | ) |  | 1,904 |
Customer relationships | 7 |  | 137,520 |  |  | (100,621 | ) |  | 36,899 |  |  | 7 |  | 136,693 |  |  | (94,537 | ) |  | 42,156 |
Non-compete agreements and other | 4 |  | 9,184 |  |  | (9,168 | ) |  | 16 |  |  | 4 |  | 9,076 |  |  | (9,032 | ) |  | 44 |
Unamortized other intangible assets: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Trademarks | N/A |  | 23,370 |  |  | — |  |  | 23,370 |  |  | N/A |  | 23,352 |  |  | — |  |  | 23,352 |
Total |  |  | $ | 196,751 |  |  | $ | (134,491 | ) |  | $ | 62,260 |  |  |  |  | $ | 195,569 |  |  | $ | (126,681 | ) |  | $ | 68,888 |

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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=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 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=26713463&loc=d3e16265-109275 + Details
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- Definition Tabular disclosure of goodwill by reportable segment and in total which includes a rollforward schedule. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 20 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=35741047&loc=d3e13816-109267 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 20 -Section 50 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=35741047&loc=d3e13854-109267 + Details
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