First Cash 401(k) Profit Sharing Plan (Details) - USD ($)	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Defined Contribution Plan Disclosure [Line Items]
Maximum annual contribution per employee	100.00%
Employer matching contribution	6.00%
Rate of employer match	40.00%
Vesting period for company contributions	5 years
Employer contribution amount	$ 800,000	$ 784,000	$ 712,000
Minimum
Defined Contribution Plan Disclosure [Line Items]
Vesting period until participation in 401(k)	6 months