Business and Summary of Significant Accounting Policies - Narrative (Details) $ / shares in Units, shares in Thousands, £ in Millions					3 Months Ended		9 Months Ended	12 Months Ended
	Jul. 27, 2017 USD ($)	Oct. 01, 2016 USD ($)	May 13, 2016 USD ($) Store	Jan. 29, 2016 USD ($)	Jun. 30, 2016 USD ($)	Mar. 31, 2016 USD ($)	Sep. 30, 2017 USD ($)	Dec. 31, 2017 GBP (£) store state shares	Dec. 31, 2017 USD ($) shares	Dec. 31, 2016 USD ($) shares	Dec. 31, 2015 USD ($) shares	Dec. 31, 2017 USD ($) store state $ / shares	Dec. 31, 2016 GBP (£)	Dec. 31, 2016 USD ($)
Significant Accounting Policies [Line Items]
Franchise royalties and fees									$ 48,278,000	$ 58,350,000	$ 63,507,000
Shipping and handling costs									67,300,000	69,900,000	77,900,000
Advertising costs									34,000,000	40,800,000	39,300,000
Amount of cooperative advertising consideration netted against advertising expense									$ 22,500,000	22,200,000	36,300,000
Prepaid advertising asset												$ 1,400,000		$ 1,200,000
Payment of outstanding note balance | £								£ 2.0
Threshold period past due for write-off of lease receivable								60 days	60 days
Depreciation expense for property, plant and equipment									$ 54,800,000	53,600,000	52,000,000
Amortization expense									27,700,000	28,800,000	28,200,000
Assets Held for Sale												10,118,000		8,866,000
Proceeds from disposition of business, net of cash acquired									1,141,000	35,899,000	13,976,000
Gain (loss) on disposition										11,400,000	0
Proceeds from sale of buildings				$ 13,600,000
Impairment of indefinite-lived intangibles		$ 0
Asset retirement obligations												$ 2,500,000		2,500,000
Foreign currency transaction gains and (losses)									2,100,000	(3,700,000)	(2,500,000)
Fair value of non-cash consideration									$ 6,100,000
Threshold of past due financing receivable that requires allowance								24 months	24 months
Software
Significant Accounting Policies [Line Items]
Amortization expense									$ 11,500,000	$ 9,200,000	$ 7,400,000
Customer Relationships
Significant Accounting Policies [Line Items]
Estimated useful lives of intangibles (in years)								2 years	2 years
Reacquired Franchise Rights
Significant Accounting Policies [Line Items]
Estimated useful lives of intangibles (in years)								10 years	10 years
Customer Lease Contracts
Significant Accounting Policies [Line Items]
Estimated useful lives of intangibles (in years)								1 year	1 year
Restricted stock units
Significant Accounting Policies [Line Items]
Anti-dilutive Securities excluded from the computation of earnings per share assuming dilution | shares								140	140	939	460
Maximum | Non-compete Agreements
Significant Accounting Policies [Line Items]
Estimated useful lives of intangibles (in years)								5 years	5 years
Maximum | Buildings and improvements
Significant Accounting Policies [Line Items]
Property, plant and equipment, useful life								40 years	40 years
Maximum | Other depreciable property and equipment
Significant Accounting Policies [Line Items]
Property, plant and equipment, useful life								15 years	15 years
Maximum | Software
Significant Accounting Policies [Line Items]
Property, plant and equipment, useful life								10 years	10 years
Maximum | Software updates
Significant Accounting Policies [Line Items]
Property, plant and equipment, useful life								1 month	1 month
Minimum | Non-compete Agreements
Significant Accounting Policies [Line Items]
Estimated useful lives of intangibles (in years)								1 year	1 year
Minimum | Buildings and improvements
Significant Accounting Policies [Line Items]
Property, plant and equipment, useful life								5 years	5 years
Minimum | Other depreciable property and equipment
Significant Accounting Policies [Line Items]
Property, plant and equipment, useful life								1 year	1 year
Minimum | Software
Significant Accounting Policies [Line Items]
Property, plant and equipment, useful life								5 years	5 years
Variable Interest Entity
Significant Accounting Policies [Line Items]
Number of retail stores | store								18				18
Held to maturity securities								£ 15.1				$ 20,400,000	£ 16.6	20,500,000
Stated interest rate								12.00%	12.00%
Asset impairment							$ 0
Sales and Lease Ownership and HomeSmart
Significant Accounting Policies [Line Items]
Franchise royalties and fees									$ 100,000	$ 400,000	$ 600,000
Royalty revenue									44,700,000	53,700,000	57,700,000
Finance fee revenue									$ 2,000,000	2,300,000	2,900,000
Deferred franchise and area development agreement fees												$ 600,000		$ 1,100,000
Sales and Lease Ownership and HomeSmart | Maximum
Significant Accounting Policies [Line Items]
Percentage of royalty of gross revenue								6.00%	6.00%
Non-refundable initial franchise fee									$ 50,000
Sales and Lease Ownership and HomeSmart | Minimum
Significant Accounting Policies [Line Items]
Non-refundable initial franchise fee									$ 15,000
Progressive Leasing
Significant Accounting Policies [Line Items]
Threshold period past due for write-off of lease receivable								120 days	120 days
Progressive Leasing | Agreement One
Significant Accounting Policies [Line Items]
Lease agreement period								12 months	12 months
Sales and Lease Ownership
Significant Accounting Policies [Line Items]
Asset impairment charge									$ 700,000	5,800,000	$ 500,000
Sales and Lease Ownership | Agreement One
Significant Accounting Policies [Line Items]
Lease agreement period								12 months	12 months
Sales and Lease Ownership | Agreement Two
Significant Accounting Policies [Line Items]
Lease agreement period								18 months	18 months
Sales and Lease Ownership | Agreement Three
Significant Accounting Policies [Line Items]
Lease agreement period								24 months	24 months
SEI/Aaron’s, Inc.
Significant Accounting Policies [Line Items]
Settlement of Pre-existing Accounts Receivable SEI owed Aaron's, Inc.	$ 3,452,000
SEI/Aaron’s, Inc. | Customer Relationships
Significant Accounting Policies [Line Items]
Estimated useful lives of intangibles (in years)								2 years	2 years
SEI/Aaron’s, Inc. | Non-compete Agreements
Significant Accounting Policies [Line Items]
Estimated useful lives of intangibles (in years)								5 years	5 years
SEI/Aaron’s, Inc. | Reacquired Franchise Rights
Significant Accounting Policies [Line Items]
Estimated useful lives of intangibles (in years)								4 years 1 month 6 days	4 years 1 month 6 days
Progressive Leasing
Significant Accounting Policies [Line Items]
Number of states in which entity operates | state								46				46
Progressive Leasing | Customer Lease Contracts
Significant Accounting Policies [Line Items]
Estimated useful lives of intangibles (in years)								1 year	1 year
Progressive Leasing | Acquired Internal Use Software
Significant Accounting Policies [Line Items]
Estimated useful lives of intangibles (in years)								3 years	3 years
Progressive Leasing | Technology
Significant Accounting Policies [Line Items]
Estimated useful lives of intangibles (in years)								10 years	10 years
Progressive Leasing | Merchant Relationships
Significant Accounting Policies [Line Items]
Estimated useful lives of intangibles (in years)								12 years	12 years
DAMI | Technology
Significant Accounting Policies [Line Items]
Estimated useful lives of intangibles (in years)								5 years	5 years
Subsidiaries | DAMI | Non-compete Agreements
Significant Accounting Policies [Line Items]
Estimated useful lives of intangibles (in years)								5 years	5 years
Subsidiaries | DAMI | Technology
Significant Accounting Policies [Line Items]
Estimated useful lives of intangibles (in years)								5 years	5 years
Disposal Group, Disposed of by Sale, Not Discontinued Operations | HomeSmart
Significant Accounting Policies [Line Items]
Disposal group, number of stores | Store			82
Impairment of long-lived assets to be disposed of					$ 1,000,000					1,100,000
Proceeds from disposition of business, net of cash acquired			$ 35,000,000
Charge related to write down of disposal group						$ 4,600,000
Disposal Group, Held-for-sale, Not Discontinued Operations | HomeSmart
Significant Accounting Policies [Line Items]
Impairment of long-lived assets to be disposed of									$ 900,000
Other operating expense (income) | Disposal Group, Disposed of by Sale, Not Discontinued Operations | HomeSmart
Significant Accounting Policies [Line Items]
Charge related to write down of disposal group										$ 4,300,000
Gain on sale of corporate office building				$ 11,100,000
Perfect Home Warrant [Member]
Significant Accounting Policies [Line Items]
Issuance of warrant price per share (in GBP per share) | $ / shares												$ 0.00001