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Goodwill and Intangible Assets | 6 Months Ended
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Jan. 31, 2019
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Goodwill and Intangible Assets | Goodwill and Other Intangible Assets Changes in the carrying amount of goodwill for the six months ended January 31, 2019, were as follows:
| IDS |  | WPS |  | Total
Balance as of July 31, 2018 | $ | 385,524 |  |  | $ | 34,291 |  |  | $ | 419,815 |
Translation adjustments | (2,178 | ) |  | (397 | ) |  | (2,575 | )
Balance as of January 31, 2019 | $ | 383,346 |  |  | $ | 33,894 |  |  | $ | 417,240 |
Goodwill is presented net of accumulated impairment losses, with the most recent impairment charge being incurred in fiscal 2015. Other intangible assets include patents, trademarks, and customer relationships with finite lives being amortized in accordance with the accounting guidance for other intangible assets. The Company also has unamortized indefinite-lived trademarks that are classified as other intangible assets. The net book value of these assets was as follows:
| January 31, 2019 |  | July 31, 2018
| 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 |  | $ | 1,448 |  |  | $ | (1,195 | ) |  | $ | 253 |  |  | 5 |  | $ | 1,448 |  |  | $ | (942 | ) |  | $ | 506 |
Trademarks and other | 10 |  | 2,467 |  |  | (2,398 | ) |  | 69 |  |  | 9 |  | 4,497 |  |  | (4,395 | ) |  | 102 |
Customer relationships | 8 |  | 48,465 |  |  | (28,607 | ) |  | 19,858 |  |  | 9 |  | 55,999 |  |  | (33,535 | ) |  | 22,464 |
Unamortized other intangible assets: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Trademarks | N/A |  | 19,472 |  |  | — |  |  | 19,472 |  |  | N/A |  | 19,516 |  |  | — |  |  | 19,516 |
Total |  |  | $ | 71,852 |  |  | $ | (32,200 | ) |  | $ | 39,652 |  |  |  |  | $ | 81,460 |  |  | $ | (38,872 | ) |  | $ | 42,588 |
Amortization expense of intangible assets was $1,434 and $1,617 for the three months ended January 31, 2019 and 2018, respectively, and $2,870 and $3,310 for the six months ended January 31, 2019 and 2018, respectively. The amortization over each of the next five fiscal years is projected to be $5,717, $5,191, $5,151, $5,006 and $2,025 for the fiscal years ending July 31, 2019, 2020, 2021, 2022 and 2023, respectively.

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- Definition The entire disclosure for goodwill and intangible assets. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -URI http://asc.fasb.org/topic&trid=2144416 + Details
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- References No definition available. + Details
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