Basis and Summary of Significant Accounting Policies - Revenue Recognition Narrative (Details) - USD ($) $ in Thousands	3 Months Ended	6 Months Ended
	Jun. 30, 2018	Jun. 30, 2018	Dec. 31, 2017
Revenue, Initial Application Period Cumulative Effect Transition [Line Items]
Deferred revenue	$ 72,613	$ 72,613	$ 68,060
Deferred revenue recognized	$ 200	$ 500
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%
Initial franchise fees
Revenue, Initial Application Period Cumulative Effect Transition [Line Items]
Deferred revenue	$ 2,300	$ 2,300
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%
Sales and Lease Ownership and HomeSmart | Minimum
Revenue, Initial Application Period Cumulative Effect Transition [Line Items]
Initial franchise fees		$ 15
Sales and Lease Ownership and HomeSmart | Maximum
Revenue, Initial Application Period Cumulative Effect Transition [Line Items]
Initial franchise fees		$ 50