Acquisitions - Additional Information Regarding Recent Acquisitions (Details)	1 Months Ended						9 Months Ended	12 Months Ended
	Jun. 30, 2019 USD ($) Store	Dec. 31, 2018 USD ($) Store	Jun. 30, 2018 store state	Jan. 31, 2018 USD ($)	Dec. 31, 2017 store	Oct. 31, 2017 USD ($) store	Jun. 30, 2018 USD ($) state	Sep. 30, 2018 USD ($)	Sep. 30, 2020 USD ($)	Sep. 30, 2019 USD ($)
Business Acquisition [Line Items]
Goodwill								$ 299,248,000	$ 257,582,000	$ 300,527,000
Goodwill, expected tax deductible amount								0
Acquisition related costs								600,000
Metro Pawn
Business Acquisition [Line Items]
Number of stores acquired | Store	7
Cash payments for acquisition	$ 7,000,000.0
Goodwill	$ 3,900,000
Pawn Stores, Mexico 2019
Business Acquisition [Line Items]
Number of stores acquired | Store		5
Cash payments for acquisition		$ 300,000
Goodwill		$ 100,000
GPMX
Business Acquisition [Line Items]
Number of stores acquired | store						112
Cash payments for acquisition				$ 1,600,000		$ 53,400,000	$ 6,700,000
Goodwill								34,816,000
Percentage acquired						100.00%
Contingent consideration						$ 2,250,000
Duration of performance period tied to contingent consideration						24 months
Aggregate purchase price						$ 61,700,000
GPMX | Trade names
Business Acquisition [Line Items]
Intangible assets								9,800,000
Montepio San Patricio
Business Acquisition [Line Items]
Number of stores acquired | store			40
Presta Dinero
Business Acquisition [Line Items]
Number of stores acquired | store			23
Number of states in which entity operates | state			7				7
Bazareno
Business Acquisition [Line Items]
Number of stores acquired | store					21
All Other
Business Acquisition [Line Items]
Goodwill								7,770,000
All Other | Trade names
Business Acquisition [Line Items]
Intangible assets								$ 6,600,000