Acquisitions (Details) $ in Thousands		1 Months Ended	12 Months Ended
	Oct. 06, 2017 USD ($) store	Dec. 31, 2018 USD ($) store	Sep. 30, 2018 USD ($)	Dec. 31, 2017 USD ($)
Business Acquisition [Line Items]
Goodwill		$ 294,881	$ 297,448	$ 288,773
Fiscal 2019 Acquisitions
Business Acquisition [Line Items]
Number of stores acquired | store		5
Aggregate cash purchase price		$ 300
Goodwill		$ 100
GPMX
Business Acquisition [Line Items]
Number of stores acquired | store	112
Percentage of voting interests acquired	100.00%
Total purchase price for acquisition	$ 61,700
Montepio San Patricio and Presta Dinero
Business Acquisition [Line Items]
Increase in deferred tax assets with offsetting goodwill reduction			$ 1,800