Supplemental Consolidated Financial Information - Supplemental of Consolidated Statements of Cash Flows Information (Details) - USD ($) $ in Thousands	12 Months Ended
	Sep. 30, 2023	Sep. 30, 2022	Sep. 30, 2021	Sep. 30, 2020
Supplemental disclosure of cash flow information
Cash and cash equivalents	$ 220,595	$ 206,028	$ 253,667
Restricted cash	8,373	8,341	9,957
Total cash and cash equivalents and restricted cash	228,968	214,369	263,624	$ 312,553
Cash paid during the period for interest	11,143	8,230	8,230
Cash paid during the period for income taxes, net	11,415	15,899	3,696
Non-cash investing and financing activities:
Pawn loans forfeited and transferred to inventory	330,947	300,487	212,756
Transfer of stock consideration for other investment	0	1,500	0
Transfer of equity consideration for acquisition	99	0	1,545
Acquisition earn-out contingency	2,000	$ 0	4,608
Accrued acquisition consideration	$ 1,412		$ 1,986