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Intangible Assets and Trademarks | 12 Months Ended
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Apr. 30, 2023
Goodwill and Intangible Assets Disclosure [Abstract] |
Intangible Assets and Trademarks | Customer Relationships Intangibles The components of customer relationships intangibles were:
| APRIL 30,
(in thousands) | 2023 |  | 2022
Customer relationship intangibles | $ | 274,000 |  |  | $ | 274,000 |
Less accumulated amortization | (243,556) |  |  | (197,889) |
Total | $ | 30,444 |  |  | $ | 76,111 |
Customer relationships intangibles are amortized over the estimated useful lives on a straight-line basis over six years. Amortization expense on customer relationships intangibles amounted to $45.7 million and $45.7 million for the years ended April 30, 2023 and 2022, respectively.

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- Definition The entire disclosure for all or part of the information related to intangible assets. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 350 -SubTopic 30 -Name Accounting Standards Codification -Publisher FASB -URI https://asc.fasb.org//350-30/tableOfContent + Details
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