Basis and Summary of Significant Accounting Policies - Narrative (Details) shares in Thousands, $ in Millions		3 Months Ended
	Jan. 29, 2016 USD ($)	Mar. 31, 2016 USD ($) shares	Mar. 31, 2015 USD ($) shares	Apr. 05, 2016 Store	Mar. 31, 2016 GBP (£) Store	Mar. 31, 2016 USD ($) Store	Dec. 31, 2015 GBP (£)	Dec. 31, 2015 USD ($)	Apr. 14, 2014 state
Significant Accounting Policies [Line Items]
Anti-dilutive securities excluded from the computation of earnings per share assuming dilution (in shares) | shares		849	468
Inventory valuation reserves						$ 34.6		$ 33.4
Lease merchandise adjustments		$ 33.9	$ 29.3
Proceeds from sales of building	$ 13.6
Assets held for sale						$ 4.9		7.0
Debt and Capital Lease Obligations
Significant Accounting Policies [Line Items]
Debt issuance costs								3.7
Prepaid Expense and Other Assets
Significant Accounting Policies [Line Items]
Debt issuance costs								(3.7)
Building | Other Operating Income (Expense)
Significant Accounting Policies [Line Items]
Gain on sale of corporate office building	$ 11.1
Variable Interest Entity, Not Primary Beneficiary
Significant Accounting Policies [Line Items]
Number of retail stores | Store					70	70
Maximum exposure to any potential losses associated with VIE						$ 22.1
Held to maturity securities					£ 15,400,000	$ 22.1	£ 15,100,000	$ 22.2
Held to maturity securities, face value | £					£ 10,000,000.0
Progressive
Significant Accounting Policies [Line Items]
Number of states in which entity operates | state									46
HomeSmart | Disposal Group, Held-for-sale, Not Discontinued Operations
Significant Accounting Policies [Line Items]
Charge related to write down of disposal group		$ 4.6
Subsequent Event | HomeSmart | Disposal Group, Held-for-sale, Not Discontinued Operations
Significant Accounting Policies [Line Items]
Number of stores agreed to sell | Store				82