Commitments And Contingencies (Details) - USD ($)	9 Months Ended	12 Months Ended
	Jan. 31, 2019	Apr. 30, 2018	Jan. 31, 2018
Commitments and Contingencies Disclosure [Abstract]
POM Maximum per Tax Return	$ 10,000
Standard guarantee accrual amount	7,000,000	$ 9,400,000	$ 3,300,000
Contingent business acquisition obligations	11,300,000	12,100,000	11,900,000
Lines of credit, total obligation	30,800,000
Remaining franchise equity lines of credit-undrawn commitment	9,300,000
Loss Contingencies [Line Items]
Loss contingency accrual	3,100,000	2,700,000	2,500,000
SCC
Loss Contingencies [Line Items]
Loss contingency accrual	$ 0	0	0
Axos
Loss Contingencies [Line Items]
Percentage of participation interest, at par	90.00%
Principal balance of purchased participation interests	$ 360,600,000
Refund Advance | Axos | Financial guarantee
Loss Contingencies [Line Items]
Limited guarantee (up to)	7,500,000
Loss contingency accrual	$ 1,400,000		$ 1,600,000
Amount paid		1,500,000
Estimate of possible loss		$ 57,000,000