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Summary of Significant Accounting Policies - Restricted Cash (Details) - USD ($) $ in Thousands | Jul. 31, 2025 | Apr. 30, 2025
--- | --- | ---
Statement [Line Items] |  |
Restricted cash | $ 111,761 | $ 114,729
Restricted cash from collections on auto finance receivables for non-recourse notes payable |  |
Statement [Line Items] |  |
Restricted cash | 48,616 | 48,571
Restricted cash on deposit in reserve accounts for non-recourse notes payable |  |
Statement [Line Items] |  |
Restricted cash | $ 63,145 | $ 66,158

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- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 944 -SubTopic 210 -Name Accounting Standards Codification -Section S99 -Paragraph 1 -Subparagraph (SX 210.7-03(a)(2)) -Publisher FASB -URI https://asc.fasb.org/1943274/2147478777/944-210-S99-1 + Details
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