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Finance Receivables - Selected information on entire portfolio of Company (Details) - Contract
 6 Months Ended 12 Months Ended
Sep. 30, 2023
Mar. 31, 2023
Contract Portfolio    
Accounts Notes And Loans Receivable [Line Items]    
Average APR 22.70% 22.80%
Average discount 6.70% 6.80%
Average term (months) 49 months 49 months
Number of active contracts 10,550 14,081
Direct Loan Portfolio    
Accounts Notes And Loans Receivable [Line Items]    
Average APR 27.80% 29.10%
Average term (months) 31 months 28 months
Number of active contracts 3,205 5,322