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Intangibles | 6 Months Ended
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Oct. 31, 2022
Goodwill and Intangible Assets Disclosure [Abstract] |
Intangibles | Intangibles The components of customer relationship intangibles were:
|  | October 31, |  | April 30,
(in thousands) |  | 2022 |  | 2022
Customer relationship intangibles |  | $ | 274,000 |  |  | $ | 274,000 |
Less accumulated amortization |  | (220,722) |  |  | (197,889) |
Total |  | $ | 53,278 |  |  | $ | 76,111 |
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 October 31, 2022 and 2021 was $11.4 million and $11.4 million, respectively, and $22.8 million and $22.8 million, respectively, for each of the six month periods ended October 31, 2022 and 2021.

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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 -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 30 -URI https://asc.fasb.org/subtopic&trid=2144471 + Details
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