Supplemental Consolidated Financial Information (Details) - USD ($) $ in Thousands	Mar. 31, 2020	Sep. 30, 2019	Mar. 31, 2019	Sep. 30, 2018
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Cash and cash equivalents	$ 193,729	$ 157,567	$ 347,786
Restricted cash	4,000	4,875	0
Cash and cash equivalents and restricted cash	197,729	162,442	347,786	$ 285,578
Gross pawn service charges receivable	34,843	41,838	34,320
Allowance for uncollectible pawn service charges receivable	(7,539)	(10,036)	(7,223)
Pawn service charges receivable, net	27,304	31,802	27,097
Gross inventory	182,794	189,092	182,295
Inventory reserves	(9,543)	(9,737)	(8,947)
Inventory, net	173,251	179,355	173,348
Prepaid expenses and other	8,953	4,784	11,647
Accounts receivable and other	10,934	10,889	15,974
Income taxes receivable	3,742	10,248	5,363
Prepaid expenses and other current assets	23,629	25,921	32,984
Property and equipment, gross	261,234	265,922	256,411
Accumulated depreciation	(202,447)	(198,565)	(188,893)
Total	58,787	67,357	67,518
Accounts payable	15,582	25,946	13,134
Accrued expenses and other	37,570	52,011	45,562
Accounts payable, accrued expenses and other current liabilities	$ 53,152	$ 77,957	$ 58,696