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Intangible Assets, Goodwill and Other | 6 Months Ended
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Jan. 31, 2021
Goodwill and Intangible Assets Disclosure [Abstract] |
Intangible Assets Disclosure | Other Intangible Assets Other intangible assets as of January 31, 2021 and July 31, 2020, consisted of the following:
| January 31, 2021 |  | July 31, 2020
| 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
Definite-lived other intangible assets: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Customer relationships and tradenames | 9 |  | $ | 45,498 |  |  | $ | (35,431) |  |  | $ | 10,067 |  |  | 9 |  | $ | 45,385 |  |  | $ | (32,670) |  |  | $ | 12,715 |
Indefinite-lived other intangible assets: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Tradenames | N/A |  | 9,742 |  |  | — |  |  | 9,742 |  |  | N/A |  | 9,619 |  |  | — |  |  | 9,619 |
Total |  |  | $ | 55,240 |  |  | $ | (35,431) |  |  | $ | 19,809 |  |  |  |  | $ | 55,004 |  |  | $ | (32,670) |  |  | $ | 22,334 |
The change in the gross carrying amount of other intangible assets as of January 31, 2021 compared to July 31, 2020 was mainly due to the effect of currency fluctuations during the six-month period. Amortization expense of intangible assets was $1,353 and $1,291 for the three months ended January 31, 2021 and 2020, respectively, and $2,704 and $2,582 for the six months ended January 31, 2021 and 2020, respectively. Amortization expense over each of the next three fiscal years is projected to be $5,407, $5,123, and $2,241 for the fiscal years ending July 31, 2021, 2022, and 2023. No amortization expense for intangible assets is projected after July 31, 2023.

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- Definition The entire disclosure for all or part of the information related to 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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