Supplemental Consolidated Financial Information - Supplemental of Consolidated Statements of Cash Flows Information (Details) - USD ($) $ in Thousands	6 Months Ended
	Mar. 31, 2023	Mar. 31, 2022	Sep. 30, 2022	Sep. 30, 2021
Supplemental disclosure of cash flow information
Cash and cash equivalents	$ 243,128	$ 254,964	$ 206,028
Restricted cash	8,451	8,713
Total cash and cash equivalents and restricted cash	251,579	263,677	$ 214,369	$ 263,624
Non-cash investing and financing activities:
Pawn loans forfeited and transferred to inventory	159,398	134,562
Transfer of consideration for other investment	0	1,500
Transfer of equity consideration for acquisition	99	0
Acquisition earn-out contingency	2,000	$ 0
Accrued acquisition consideration	$ 1,145