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Goodwill and Intangible Assets | 3 Months Ended
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Oct. 31, 2019
Goodwill and Intangible Assets Disclosure [Abstract] |
Goodwill and Intangible Assets | NOTE 5 – Goodwill and Intangible Assets The following table sets forth amortizable intangible assets by major asset class:
(In thousands) |  | October 31, 2019 |  | July 31, 2019
Amortized intangibles: |  |  |  |
Supply contracts and customer relationships |  | $ | 49,072 |  |  | $ | 49,109 |
Trade names |  | 23,518 |  |  | 23,501 |
Licenses and databases |  | 7,695 |  |  | 7,688 |
Accumulated amortization |  | (27,668 | ) |  | (25,142 | )
Net intangibles |  | $ | 52,617 |  |  | $ | 55,156 |
Aggregate amortization expense on amortizable intangible assets was $2.5 million and $2.9 million for the three months ended October 31, 2019 and 2018, respectively. The change in the carrying amount of goodwill was as follows (in thousands):
Balance as of July 31, 2019 |  | $ | 333,321 |
Effect of foreign currency exchange rates |  | 3,858 |
Balance as of October 31, 2019 |  | $ | 337,179 |

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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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