Supplemental Consolidated Financial Information - Supplemental Information (Details) - USD ($) $ in Thousands	Jun. 30, 2018	Sep. 30, 2017	Jun. 30, 2017
Pawn service charges receivable, net:
Gross pawn service charges receivable	$ 44,522	$ 42,117	$ 41,533
Allowance for uncollectible pawn service charges receivable	(11,134)	(10,569)	(10,948)
Pawn service charges receivable, net	33,388	31,548	30,585
Inventory, net:
Gross inventory	160,159	161,212	141,510
Inventory reserves	(9,014)	(6,801)	(6,457)
Inventory, net	151,145	154,411	135,053
Prepaid expenses and other	10,545	9,250	10,421
Accounts receivable and other	25,160	19,515	17,483
Restricted cash	252	0	4,089
2019 Convertible Notes Hedges	7,491	0	0
Prepaid expenses and other current assets	43,448	28,765	31,993
Property and equipment, net:
Property and equipment, gross	248,880	224,240	215,823
Accumulated depreciation	(177,293)	(166,281)	(162,801)
Total	71,587	57,959	53,022
Accounts payable	12,381	13,064	10,673
Accrued expenses and other	49,432	48,479	54,157
Accounts payable, accrued expenses and other current liabilities	$ 61,813	$ 61,543	$ 64,830