Basis and Summary of Significant Accounting Policies - Revenue Recognition Narrative (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2019	Sep. 30, 2018	Sep. 30, 2019	Sep. 30, 2018
Revenue, Initial Application Period Cumulative Effect Transition [Line Items]
Revenues	$ 963,808	$ 953,071	$ 2,944,052	$ 2,835,739
Promotional fees percent promotional interest period one			6 years
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	35.99%		35.99%
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 | Sales and Lease Ownership and HomeSmart | Minimum
Revenue, Initial Application Period Cumulative Effect Transition [Line Items]
Revenues			$ 15
Initial franchise fees | Sales and Lease Ownership and HomeSmart | Maximum
Revenue, Initial Application Period Cumulative Effect Transition [Line Items]
Revenues			$ 50