Supplemental Consolidated Financial Information - Schedule of Supplemental of Consolidated Statements of Cash Flows Information (Details) - USD ($) $ in Thousands	12 Months Ended
	Sep. 30, 2024	Sep. 30, 2023	Sep. 30, 2022	Sep. 30, 2021
Supplemental disclosure of cash flow information
Cash and cash equivalents	$ 170,513	$ 220,595	$ 206,028
Restricted cash	9,294	8,373	8,341
Total cash and cash equivalents and restricted cash	179,807	228,968	214,369	$ 263,624
Cash paid during the period for interest	12,069	11,143	8,230
Cash paid during the period for income taxes, net	25,739	11,415	15,899
Non-cash investing and financing activities:
Pawn loans forfeited and transferred to inventory	383,374	330,947	300,487
Transfer of stock consideration for other investment	0	0	1,500
Transfer of equity consideration for acquisition	0	99	0
Acquisition earn-out contingency	0	2,000	0
Accrued acquisition consideration	791	1,412
Convertible notes share settlement	$ 799	$ 0	$ 0