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Originating In The Current Year [Member] Loans Originating In The Current Year [Member] Loans Originating In The Current Year 2018 Loans Originated 8 Years Ago [Member] Loans Originated 8 Years Ago [Member] Product and Service [Domain] Product and Service [Domain] Cash paid during the period for income taxes, net of refunds Income Tax Paid, after Refund Received Disaggregation of Revenue [Table] Disaggregation of Revenue [Table] Entity Interactive Data Current Entity Interactive Data Current Variable Rate [Axis] Variable Rate [Axis] Deferred income taxes, net Deferred Income Tax Liabilities, Net Compensation Actually Paid vs. Other Measure Compensation Actually Paid vs. Other Measure [Text Block] Term ABS 2021-1 [Member] TermAssetBackedSecuredFinancingsTwoThousandTwentyOneOne [Member] TermAssetBackedSecuredFinancingsTwoThousandTwentyOneOne Over one year to five years, cost Debt Securities, Available-for-Sale, Amortized Cost, Maturity, Allocated and Single Maturity Date, after Year One 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Collateralized Mortgage-Backed Securities [Member] Insider Trading Arrangements [Line Items] Award Type [Axis] Award Type [Axis] Loans Originating Three Years Prior [Member] Loans Originating Three Years Prior [Member] Loans Originating Three Years Prior Provision for Credit Losses on Forecast Changes Provision for Credit Losses on Forecast Changes Provision for Credit Losses on Forecast Changes Named Executive Officers, Footnote Named Executive Officers, Footnote [Text Block] 2017 Loans Originated 9 Years Ago [Member] Loans Originated 9 Years Ago [Member] Summary of Information Related to New Consumer Loan Assignments Schedule Of New Consumer Loan Assignments [Table Text Block] Schedule of new consumer loan assignments. 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Name Trading Arrangement, Individual Name 2026 Loans Originated in the Current Year [Member] Loans Originated in the Current Year [Member] Cash and cash equivalents Cash and cash equivalents Cash and Cash Equivalent Term ABS 2023-5 [Member] TermAssetBackedSecuredFinancingsTwoThousandTwentyThreeFive [Member] TermAssetBackedSecuredFinancingsTwoThousandTwentyThreeFive Vested restricted stock units Weighted Average Number of Shares, Restricted Stock Company Selected Measure Amount Company Selected Measure Amount 2029 Employee Service Share Based Compensation Estimated Allocation Of Recognized Period Costs In Three Years Employee Service Share Based Compensation Estimated Allocation Of Recognized Period Costs In Three Years Financial Asset, Period Past Due [Axis] Financial Asset, Aging [Axis] Financing Receivable, Year Three, Originated, Two Years before Current Fiscal Year, Writeoff Financing Receivable, Year Three, Originated, Two Years before Current Fiscal Year, Writeoff Income taxes receivable Income Taxes Receivable Outstanding Outstanding Share-Based Compensation Arrangement by Share-Based Payment Award, Non-Option Equity Instruments, Outstanding, Number Investments, Debt and Equity Securities [Abstract] Investments, Debt and Equity Securities [Abstract] Percentage of new consumer loans dollar volume Percentage of new consumer loans dollar volume Percentage of new consumer loans dollar volume Schedule of stock awards excluded from the computation of diluted net income per share Schedule of stock awards excluded from the computation of diluted net income per share [Table Text Block] Schedule of stock awards excluded from the computation of diluted net income per share Schedule of Accounts, Notes, Loans and Financing Receivable [Table] Accounts and Financing Receivables [Table] Term ABS 2022-2 [Member] TermAssetBackedSecuredFinancingsTwoThousandTwentyTwoTwo [Member] TermAssetBackedSecuredFinancingsTwoThousandTwentyTwoTwo Prime Rate [Member] Prime Rate [Member] Non-PEO NEO Non-PEO NEO [Member] Senior Notes [Member] Senior Notes [Member] Entity Address, Address Line One Entity Address, Address Line One Provision for income taxes Income Tax Expense (Benefit) Other Income and Other Expense Disclosure [Text Block] Other Income and Other Expense Disclosure [Text Block] Accelerated payments of Dealer Holdback Accelerated Payments of Dealer Holdback Accelerated Payments of Dealer Holdback The cash outflow for payments made to dealers under our Portfolio Program at the time a pool of 100 or more consumer loans is closed by dealers with a single open pool or at the time 100 consumer loans have been collectively assigned by dealers with multiple open pools. Award Timing Method Award Timing Method [Text Block] Loss Contingency, Nature [Domain] Loss Contingency, Nature [Domain] Warehouse Facility IV [Member] Warehouse Facility IV [Member] Warehouse Facility IV Member Net increase in cash and cash equivalents and restricted cash and cash equivalents Cash, Cash Equivalent, Restricted Cash, and Restricted Cash Equivalent, Period Increase (Decrease), Including Exchange Rate Effect and Discontinued Operation Forgone Recovery, Explanation of Impracticability Forgone Recovery, Explanation of Impracticability [Text Block] Net income Net income Net Income (Loss) Attributable to Parent Erroneous Compensation Analysis Erroneous Compensation Analysis [Text Block] Unamortized Debt Issuance Costs Unamortized Debt Issuance Expense Proceeds from Collection of Loans Receivable Proceeds from Collection of Loans Receivable Balance Sheet Location [Axis] Location, Statement of Financial Position, Balance [Axis] Statement [Table] Statement [Table] Restatement Determination Date: Restatement Determination Date [Axis] Increase in number of shares authorized for repurchase Stock Repurchase Program Number Of Shares Authorized To Be Repurchased Increase Stock Repurchase Program Number Of Shares Authorized To Be Repurchased Increase Term ABS 2026-1 [Member] TermAssetBackedSecuredFinancingsTwoThousandTwentySixOne [Member] TermAssetBackedSecuredFinancingsTwoThousandTwentySixOne 2023 Loans Originated 3 Years Ago [Member] Loans Originated 3 Years Ago [Member] Monthly servicing fee as a percentage of collections on newer contributed loans Percentage of collections on newer contributed loans Percentage of collections on newer contributed loans Trust Assets And Reinsurance Liabilities [Axis] Trust Assets And Reinsurance Liabilities [Axis] Trust Assets And Reinsurance Liabilities Axis Recoveries Financing Receivable, Allowance for Credit Loss, Recovery 2024 Loans Originated 2 Years Ago [Member] Loans Originated 2 Years Ago Trust Assets [Member] Trust Assets [Member] Trust Assets Member Cash and Cash Equivalents [Axis] Cash and Cash Equivalents [Axis] Income taxes payable Accrued Income Taxes Term ABS 2023-2 [Member] TermAssetBackedSecuredFinancingsTwoThousandTwentyThreeTwo [Member] TermAssetBackedSecuredFinancingsTwoThousandTwentyThreeTwo Effective Income Tax Rate Reconciliation, Nondeductible Expense, Share-Based Payment Arrangement, Amount Effective Income Tax Rate Reconciliation, Nondeductible Expense, Share-Based Payment Arrangement, Amount Revenue: Revenues [Abstract] Forfeited Share-Based Compensation Arrangement by Share-Based Payment Award, Non-Option Equity Instruments, Forfeitures Pension Benefits Adjustments, Footnote Pension Benefits Adjustments, Footnote [Text Block]