Basis and Summary of Significant Accounting Policies - Additional Information (Detail)	1 Months Ended		3 Months Ended		9 Months Ended		12 Months Ended			9 Months Ended		1 Months Ended			3 Months Ended	9 Months Ended	3 Months Ended	9 Months Ended	3 Months Ended	9 Months Ended	3 Months Ended	9 Months Ended		1 Months Ended					1 Months Ended			3 Months Ended	9 Months Ended	0 Months Ended
	Feb. 28, 2014	Dec. 31, 2013 USD ($) store	Sep. 30, 2014 USD ($) store	Sep. 30, 2013 USD ($)	Sep. 30, 2014 USD ($) store	Sep. 30, 2013 USD ($)	Dec. 31, 2013 USD ($) store	Sep. 30, 2014 Level 2 USD ($)	Dec. 31, 2013 Level 2 USD ($)	Sep. 30, 2014 Employee	Sep. 30, 2014 Non Employee Director	Feb. 28, 2014 Treasury Stock USD ($)	Dec. 31, 2013 Treasury Stock USD ($)	Dec. 31, 2013 Additional Paid-in Capital USD ($)	Sep. 30, 2014 Stock Option	Sep. 30, 2014 Stock Option	Sep. 30, 2013 Restricted stock units	Sep. 30, 2013 Restricted stock units	Sep. 30, 2013 Restricted stock awards	Sep. 30, 2013 Restricted stock awards	Sep. 30, 2014 Performance based restricted stock units	Sep. 30, 2014 Performance based restricted stock units	Sep. 30, 2014 Operating Expense USD ($)	Oct. 14, 2011 Variable Interest Entity, Not Primary Beneficiary	Sep. 30, 2014 Variable Interest Entity, Not Primary Beneficiary USD ($) store	Sep. 30, 2014 Variable Interest Entity, Not Primary Beneficiary GBP (£)	Dec. 31, 2013 Variable Interest Entity, Not Primary Beneficiary USD ($)	Dec. 31, 2013 Variable Interest Entity, Not Primary Beneficiary GBP (£)	Jan. 31, 2014 RIMCO store right	Sep. 30, 2014 RIMCO store	Dec. 31, 2013 RIMCO store	Sep. 30, 2014 Sales and Lease Ownership USD ($)	Sep. 30, 2014 Sales and Lease Ownership USD ($)	Apr. 14, 2014 Progressive Finance Holdings, LLC USD ($) retail_location state
Significant Accounting Policies [Line Items]
Business acquisition, percentage of voting interests acquired																																		100.00%
Acquisitions of businesses, net of cash acquired																																		$ 700,000,000
Number of retail locations (over 15,000)																																		15,000
Number of states in which entity operates																																		46
Number of stores sold during period																													27
Number of franchise rights sold during period																													5
Number of franchises granted during period					927		940
Percentage of common stock outstanding																								11.50%
Number of retail stores		1,370	1,316		1,316		1,370																		67	67				0	27
Held to maturity securities		112,391,000	21,704,000		21,704,000		112,391,000																		21,700,000	13,400,000	20,700,000	12,500,000
Held to maturity securities, face value			21,704,000		21,704,000																					10,000,000
Maximum exposure to any potential losses associated with VIE																									21,700,000
Sales taxes																							19,200,000
Uncertain tax benefits that, if recognized, would affect effective tax rate		1,500,000	1,800,000		1,800,000		1,500,000
Anti-dilutive Securities excluded from the computation of earnings per share assuming dilution (in shares)															166,000	143,000	0	0	0	0	308,000	278,000
Stock repurchased during period, value		125,000,000											100,000,000	25,000,000
Stock repurchased during period, shares	1,000,952	3,502,627
Stock repurchase program, percent of shares authorized for repurchase		80.00%
Accelerated share repurchases, initial price paid per share													$ 28.55
Accelerated share repurchases, final price paid per share												$ 27.76
Lease merchandise adjustments			29,900,000	17,400,000	64,600,000	42,000,000
Assets Held For Sale		15,840,000	7,045,000		7,045,000		15,840,000	7,045,000	15,840,000
Assets held-for-sale, at carrying value		9,700,000					9,700,000
Impairment charge						3,000,000																										566,000	805,000
Percentage of receipt of base compensation										75.00%	100.00%
Percentage of receipt of incentive pay compensation										100.00%	100.00%
Deferred compensation liability								12,635,000	12,557,000
Cash surrender value of company-owned life insurance ("COLI") contracts		14,100,000	14,300,000		14,300,000		14,100,000
Deferred compensation expense charged to operations for Company's matching contributions			22,000	34,000	67,000	107,000
Benefits paid			$ 1,400,000	$ 783,000	$ 1,400,000	$ 783,000