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Goodwill and Intangible Assets (Tables) | 9 Months Ended
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Apr. 30, 2017
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Changes in Carrying Amount of Goodwill | Changes in the carrying amount of goodwill for the nine months ended April 30, 2017, were as follows:
| IDS |  | WPS |  | Total
Balance as of July 31, 2016 | $ | 384,529 |  |  | $ | 45,342 |  |  | $ | 429,871 |
Translation adjustments | (4,298 | ) |  | 362 |  |  | (3,936 | )
Realignment of businesses between segments | 2,490 |  |  | (2,490 | ) |  | — |
Balance as of April 30, 2017 | $ | 382,721 |  |  | $ | 43,214 |  |  | $ | 425,935 |
Other Intangible Assets | The net book value of these assets was as follows:
| April 30, 2017 |  | July 31, 2016
| 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 |  | $ | 12,337 |  |  | $ | (11,410 | ) |  | $ | 927 |  |  | 5 |  | $ | 12,252 |  |  | $ | (11,063 | ) |  | $ | 1,189 |
Trademarks and other | 5 |  | 14,328 |  |  | (13,864 | ) |  | 464 |  |  | 5 |  | 14,359 |  |  | (13,709 | ) |  | 650 |
Customer relationships | 7 |  | 134,618 |  |  | (104,496 | ) |  | 30,122 |  |  | 7 |  | 135,795 |  |  | (100,830 | ) |  | 34,965 |
Non-compete agreements and other | 4 |  | 9,091 |  |  | (9,091 | ) |  | — |  |  | 4 |  | 9,153 |  |  | (9,142 | ) |  | 11 |
Unamortized other intangible assets: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Trademarks | N/A |  | 22,594 |  |  | — |  |  | 22,594 |  |  | N/A |  | 22,991 |  |  | — |  |  | 22,991 |
Total |  |  | $ | 192,968 |  |  | $ | (138,861 | ) |  | $ | 54,107 |  |  |  |  | $ | 194,550 |  |  | $ | (134,744 | ) |  | $ | 59,806 |

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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=66006027&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=66006027&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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