Basis and Summary of Significant Accounting Policies - Revenue Recognition Narrative (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2020	Jun. 30, 2019	Jun. 30, 2020	Jun. 30, 2019
Revenue, Initial Application Period Cumulative Effect Transition [Line Items]
Revenues	$ 1,030,119	$ 968,141	$ 2,131,393	$ 1,980,244
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	27.00%		27.00%
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%
Progressive Finance Holdings, LLC | Agreement One
Revenue, Initial Application Period Cumulative Effect Transition [Line Items]
Lease agreement period	12 months		12 months
Sales And Lease Ownership | Agreement One
Revenue, Initial Application Period Cumulative Effect Transition [Line Items]
Lease agreement period	12 months		12 months
Sales And Lease Ownership | Agreement Two
Revenue, Initial Application Period Cumulative Effect Transition [Line Items]
Lease agreement period	18 months		18 months
Sales And Lease Ownership | Agreement Three
Revenue, Initial Application Period Cumulative Effect Transition [Line Items]
Lease agreement period	24 months		24 months
Sales and Lease Ownership and HomeSmart
Revenue, Initial Application Period Cumulative Effect Transition [Line Items]
Royalty payment rate	6.00%