Summary of Significant Accounting Policies - Sales (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Jan. 31, 2025	Jan. 31, 2024	Jan. 31, 2025	Jan. 31, 2024
Disaggregation of Revenue [Line Items]
Sales	$ 263,484	$ 240,401	$ 836,506	$ 854,170
Sales – used autos
Disaggregation of Revenue [Line Items]
Sales	228,461	200,341	717,552	735,145
Wholesales – third party
Disaggregation of Revenue [Line Items]
Sales	9,091	13,479	28,462	39,502
Service contract sales
Disaggregation of Revenue [Line Items]
Sales	17,276	17,106	63,896	51,102
Accident protection plan revenue
Disaggregation of Revenue [Line Items]
Sales	$ 8,656	$ 9,475	$ 26,596	$ 28,421