Finance Receivables - Assessment of credit quality by creditworthiness (Details) - Finance Receivables [Member] - USD ($) $ in Thousands	Mar. 31, 2024	Mar. 31, 2023
Accounts Notes And Loans Receivable [Line Items]
Total	$ 0	$ 127,482
Finance receivables	0	128,170
Direct Loans
Accounts Notes And Loans Receivable [Line Items]
Total	0	18,654
Finance receivables	0	18,752
Performing accounts
Accounts Notes And Loans Receivable [Line Items]
Total	0	118,782
Performing accounts | Direct Loans
Accounts Notes And Loans Receivable [Line Items]
Total	0	16,926
Non-performing accounts
Accounts Notes And Loans Receivable [Line Items]
Total	0	8,700
Non-performing accounts | Direct Loans
Accounts Notes And Loans Receivable [Line Items]
Total	0	1,728
Chapter 13 bankruptcy
Accounts Notes And Loans Receivable [Line Items]
Finance receivables	0	688
Chapter 13 bankruptcy | Direct Loans
Accounts Notes And Loans Receivable [Line Items]
Finance receivables	0	98
Contract Portfolio
Accounts Notes And Loans Receivable [Line Items]
Total	0	108,828
Finance receivables	0	109,418
Contract Portfolio | Performing accounts
Accounts Notes And Loans Receivable [Line Items]
Total	0	101,856
Contract Portfolio | Non-performing accounts
Accounts Notes And Loans Receivable [Line Items]
Total	0	6,972
Contract Portfolio | Chapter 13 bankruptcy
Accounts Notes And Loans Receivable [Line Items]
Finance receivables	$ 0	$ 590