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Intangibles (Schedule of Intangible Assets) (Details) - Customer relationships - USD ($) $ in Thousands | Jan. 31, 2023 | Apr. 30, 2022
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Finite-Lived Intangible Assets [Line Items] |  |
Intangibles, gross | $ 274,000 | $ 274,000
Less accumulated amortization | (232,139) | (197,889)
Intangibles, net | $ 41,861 | $ 76,111

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