Strategic Investments - Additional Information (Details) - USD ($) $ in Thousands		1 Months Ended		3 Months Ended		6 Months Ended
	Dec. 02, 2022	Oct. 31, 2023	Oct. 31, 2021	Mar. 31, 2024	Mar. 31, 2023	Mar. 31, 2024	Mar. 31, 2023	Sep. 30, 2023
Schedule of Equity Method Investments [Line Items]
Dividends from unconsolidated affiliates						$ 0	$ 1,775
Income (loss) from equity method investments				$ 1,719	$ (32,501)	2,872	(30,917)
Notes receivable, net				$ 0	1,233	$ 0	1,233	$ 0
Cash Converters International Limited
Schedule of Equity Method Investments [Line Items]
Shares owned (in shares)				273,939,157		273,939,157
Ownership percentage				43.70%		43.70%
Percentage of ownership increase						30.00%
Dividends from unconsolidated affiliates						$ 1,700	1,800
Founders One LLC
Schedule of Equity Method Investments [Line Items]
Payments to acquire equity investment	$ 15,000	$ 15,000	$ 15,000
Notes receivable, net				$ 15,000		15,000
Equity securities, fair value		$ 45,000		45,000		45,000
Cash Converted International Limited
Schedule of Equity Method Investments [Line Items]
Income (loss) from equity method investments				$ 1,700	(32,500)	$ 2,900	$ (30,900)
Impairment					$ 32,400