Supplemental Consolidated Financial Information and Discontinued Operations - Supplemental Consolidated Balance Sheet Information (Details) - USD ($) $ in Thousands	Sep. 30, 2019	Dec. 31, 2018	Sep. 30, 2018	Dec. 31, 2017	Sep. 30, 2017	Sep. 30, 2016
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Cash and cash equivalents	$ 157,567		$ 285,311	$ 112,957
Restricted cash	4,875		267
Cash and cash equivalents and restricted cash	162,442		285,578		$ 163,869	$ 72,531
Gross pawn service charges receivable	41,838		40,719
Allowance for uncollectible pawn service charges receivable	(10,036)		(9,760)
Pawn service charges receivable, net	31,802		30,959
Gross inventory	189,092		176,198
Inventory reserves	(9,737)		(9,201)
Inventory, net	179,355		166,997
Prepaid expenses and other	4,784		9,402
Accounts receivable and other	10,889		18,901
Income taxes prepaid and receivable	10,248		2,334
2019 Convertible Notes Hedges	0		2,552
Prepaid expenses and other current assets	30,796	$ 31,483	33,456	26,394
Property and equipment, gross	265,922		253,022
Accumulated depreciation	(198,565)		(179,373)
Property and equipment, net	67,357		73,649
Accounts payable	25,946		10,500
Accrued payroll	6,149		6,294
Bonus accrual	9,901		12,738
Other payroll related expenses	5,040		2,963
Accrued interest	2,793		3,835
Accrued rent and property taxes	11,702		12,106
Accrued sales and VAT taxes	10,680		1,319
Deferred revenues	2,929		2,747
Other accrued expenses	2,510		2,659
Income taxes payable	307		2,797
Account payable, accrued expenses and other current liabilities	77,957	$ 57,380	57,958	$ 60,134
Unrecognized tax benefits, non-current	1,362		1,148
Other long-term liabilities	5,940		5,742
Other long-term liabilities	$ 7,302		$ 6,890