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Description Of Business (Tables) | 12 Months Ended
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Dec. 31, 2018
Description Of Business [Abstract] |
Financing Receivable Credit Quality Indicators [Table Text Block] | The following table shows the percentage of Consumer Loans assigned to us with either FICO® scores below 650 or no FICO® scores:
|  | For the Years Ended December 31,
Consumer Loan Assignment Volume |  | 2018 |  | 2017 |  | 2016
Percentage of total unit volume with either FICO® scores below 650 or no FICO® scores |  | 95.6 | % |  | 95.6 | % |  | 95.8 | %
Schedule Of Percentage Of Consumer Loans Assigned Based On Unit and Dollar Volumes | The following table shows the percentage of Consumer Loans assigned to us as Dealer Loans and Purchased Loans for each of the last three years:
|  | Unit Volume |  | Dollar Volume (1)
For the Years Ended December 31, |  | Dealer Loans |  | Purchased Loans |  | Dealer Loans |  | Purchased Loans
2016 |  | 78.6 | % |  | 21.4 | % |  | 71.4 | % |  | 28.6 | %
2017 |  | 72.5 | % |  | 27.5 | % |  | 68.5 | % |  | 31.5 | %
2018 |  | 69.7 | % |  | 30.3 | % |  | 67.2 | % |  | 32.8 | %
(1) | Represents advances paid to Dealers on Consumer Loans assigned under our Portfolio Program and one-time payments made to Dealers to purchase Consumer Loans assigned under our Purchase Program. Payments of Dealer Holdback (as defined below) and accelerated Dealer Holdback are not included.

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- Definition Tabular disclosure of financing receivables by credit quality indicator. The credit quality indicator is a statistic about the credit quality of financing receivables. Examples include, but not limited to, consumer credit risk scores, credit-rating-agency ratings, an entity's internal credit risk grades, loan-to-value ratios, collateral, collection experience and other internal metrics. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 50 -Paragraph 29 -URI http://asc.fasb.org/extlink&oid=84173941&loc=SL6953659-111524 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 55 -Paragraph 19 -URI http://asc.fasb.org/extlink&oid=82894031&loc=SL6953803-111525 + Details
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