Supplemental Consolidated Financial Information - Supplemental of Consolidated Statements of Cash Flows Information (Details) - USD ($) $ in Thousands	12 Months Ended
	Sep. 30, 2022	Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2019
Supplemental disclosure of cash flow information
Cash and cash equivalents	$ 206,028	$ 253,667	$ 304,542
Restricted cash	8,341	9,957	8,011
Total cash and cash equivalents and restricted cash	214,369	263,624	312,553	$ 162,442
Cash paid during the period for interest	8,230	8,230	8,489
Cash paid during the period for income taxes, net	15,899	3,696	9,753
Non-cash investing and financing activities:
Pawn loans forfeited and transferred to inventory	300,487	212,756	241,252
Transfer of consideration for acquisition	0	1,545	0
Transfer of stock consideration for other investment	1,500	0	0
Acquisition earn-out contingency	0	4,608	$ 0
Accrued acquisition consideration held as restricted cash	$ 0	$ 1,986