Basis and Summary of Significant Accounting Policies - Revenue Recognition Narrative (Details) - USD ($)	3 Months Ended	9 Months Ended
	Sep. 30, 2018	Sep. 30, 2018	Dec. 31, 2017
Revenue, Initial Application Period Cumulative Effect Transition [Line Items]
Deferred revenue	$ 71,554,000	$ 71,554,000	$ 68,060,000
Deferred revenue recognized	$ 400,000	$ 800,000
Promotional fees percent promotional interest period one		6 months
Promotional fees percent promotional interest period two		12 months
Promotional fees percent promotional interest period three		18 months
Credit Card Loans
Revenue, Initial Application Period Cumulative Effect Transition [Line Items]
Privilege period		24 months
Minimum payment required percentage of outstanding loan balance	3.50%	3.50%
Minimum | Credit Card Loans
Revenue, Initial Application Period Cumulative Effect Transition [Line Items]
Merchant fee percent		3.00%
Promotional fees percent		1.00%
Interest rate fixed and variable	25.00%	25.00%
Maximum | Credit Card Loans
Revenue, Initial Application Period Cumulative Effect Transition [Line Items]
Merchant fee percent		25.00%
Promotional fees percent		8.00%
Interest rate fixed and variable	34.99%	34.99%
Sales And Lease Ownership | Agreement One
Revenue, Initial Application Period Cumulative Effect Transition [Line Items]
Lease agreement period		12 months
Sales And Lease Ownership | Agreement Two
Revenue, Initial Application Period Cumulative Effect Transition [Line Items]
Lease agreement period		18 months
Sales And Lease Ownership | Agreement Three
Revenue, Initial Application Period Cumulative Effect Transition [Line Items]
Lease agreement period		24 months
Progressive Finance Holdings, LLC | Agreement One
Revenue, Initial Application Period Cumulative Effect Transition [Line Items]
Lease agreement period		12 months
Sales and Lease Ownership and HomeSmart
Revenue, Initial Application Period Cumulative Effect Transition [Line Items]
Royalty payment rate		6.00%
Initial franchise fees
Revenue, Initial Application Period Cumulative Effect Transition [Line Items]
Deferred revenue	$ 1,900,000	$ 1,900,000
Initial franchise fees | Sales and Lease Ownership and HomeSmart | Minimum
Revenue, Initial Application Period Cumulative Effect Transition [Line Items]
Initial franchise fees		15,000
Initial franchise fees | Sales and Lease Ownership and HomeSmart | Maximum
Revenue, Initial Application Period Cumulative Effect Transition [Line Items]
Initial franchise fees		$ 50,000