COMMITMENTS AND CONTINGENCIES (Details) - USD ($)	3 Months Ended	9 Months Ended
	Jan. 31, 2021	Jan. 31, 2021	Apr. 30, 2020	Jan. 31, 2020
Loss Contingencies [Line Items]
POM maximum per tax return		$ 10,000
Standard guarantee accrual amount	$ 9,200,000	9,200,000	$ 9,400,000	$ 7,000,000.0
Contingent business acquisition obligations	18,800,000	18,800,000	14,200,000	11,400,000
Lines of credit, total obligation	29,300,000	29,300,000
Remaining franchise equity lines of credit-undrawn commitment	13,700,000	$ 13,700,000
Social security subsidy received	15,900,000
Percentage of participation interest, at par		90.00%
Purchased of participation interest, at par		$ 303,200,000
Loss contingency accrual	5,500,000	5,500,000	$ 1,600,000	1,600,000
MetaBank
Loss Contingencies [Line Items]
Guarantor Obligations, Maximum Exposure, Undiscounted	18,000,000.0	18,000,000.0
Loss contingency accrual	$ 1,300,000	$ 1,300,000
Axos
Loss Contingencies [Line Items]
Loss contingency accrual				$ 1,900,000