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Intangibles | 3 Months Ended
--- | ---
Jul. 31, 2023
Goodwill and Intangible Assets Disclosure [Abstract] |
Intangibles | Intangibles The components of customer relationship intangibles were:
|  | July 31, |  | April 30,
(in thousands) |  | 2023 |  | 2023
Customer relationship intangibles |  | $ | 274,000 |  |  | $ | 274,000 |
Less accumulated amortization |  | (254,972) |  |  | (243,556) |
Total |  | $ | 19,028 |  |  | $ | 30,444 |
Customer relationship intangibles are amortized over the estimated useful lives on a straight-line basis over six years. Amortization expense for the three-month periods ended July 31, 2023 and 2022 was $11.4 million and $11.4 million, 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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