Transactions with Controlled Companies - Nationwide Loan Company LLC (Details) - USD ($) $ in Thousands			3 Months Ended			12 Months Ended
	Aug. 25, 2021	Mar. 24, 2020	Sep. 30, 2022	Sep. 30, 2021		Aug. 31, 2022	Aug. 31, 2021	Aug. 31, 2020	Jun. 30, 2022
Subsidiary of Limited Liability Company or Limited Partnership [Line Items]
Return of capital	$ 12,263	$ 1,500		$ 3,695	[1]	$ 0	$ 25,784	$ 96,720
Interest Income			$ 174,318	146,271
Dividend Income			2,901	1,267
Interest Receivable			18,781						$ 12,925
Other Receivables			$ 1,309						745
Nationwide Loan Company LLC | Members of Nationwide Management
Subsidiary of Limited Liability Company or Limited Partnership [Line Items]
Ownership interest			5.52%
Nationwide Acceptance Holdings LLC | Nationwide Loan Company LLC
Subsidiary of Limited Liability Company or Limited Partnership [Line Items]
Ownership interest			94.48%
Reportable Legal Entities | Subsidiaries | Nationwide Acceptance Holdings LLC
Subsidiary of Limited Liability Company or Limited Partnership [Line Items]
Ownership interest			100.00%
Reportable Legal Entities | Subsidiaries | Nationwide Acceptance Holdings LLC
Subsidiary of Limited Liability Company or Limited Partnership [Line Items]
Interest Income			$ 1,045	1,036
Dividend Income			3	1,250
Managerial Assistance			100	100
Interest Income Capitalized as PIK			522	$ 0
Interest Receivable			12						11
Other Receivables			$ 9						$ 9

[1] Certain reclassifications have been made in the presentation of prior year amounts since initial disclosure in our Quarterly Report on Form 10-Q for the period ended September 30, 2021 to conform to the presentation in our Annual Report on Form 10-K for the year ended June 30, 2022. In addition, we have not yet finalized return of capital estimates for the current period. See Note 2 and Note 12 within the accompanying notes to consolidated financial statements for further discussion.