Class of Stock [Axis] Preferred Stock [Member] Series A Preferred Stock [Member] Series B Preferred Stock [Member] Equity Components [Axis] Common Stock [Member] Retained Earnings [Member] AOCI Attributable to Parent [Member] Award Type [Axis] Options Exercised [Member] Income Statement Location [Axis] Origination And Servicing Fees [Member] Direct Mail Revenues [Member] Convenience Fee [Member] Recoveries [Member] Sales Tax Refunds [Member] Other Income [Member] Property Subject to or Available for Operating Lease [Axis] Operating Lease [Member] Finance Lease [Member] Equity Option [Member] Exercise Price Range [Axis] $0.95 - $1.99 [Member] $2.00 - $2.99 [Member] $3.00 - $3.99 [Member] $4.00 - $4.99 [Member] $5.00 - $5.99 [Member] $6.00 - $6.99 [Member] $7.00 - $7.99 [Member] $8.00 - $11.00 [Member] Share Repurchase Program [Axis] Open Market Purchases[Member] Shares Redeemed [Member] Financial Asset, Aging [Axis] Financial Asset, 1 to 29 Days Past Due [Member] Financial Asset, 30 to 59 Days Past Due [Member] Financial Asset, 60 to 89 Days Past Due [Member] Financial Asset, Equal to or Greater than 90 Days Past Due [Member] Financing Receivable Portfolio Segment [Axis] Vintage Pool 2012 [Member] Vintage Pool 2013 [Member] Vintage Pool 2014 [Member] Vintage Pool 2015 [Member] Vintage Pool 2016 [Member] Vintage Pool 2017 [Member] Financial Instrument [Axis] CPS 2017-A [Member] CPS 2017-B [Member] CPS 2017-C [Member] CPS 2017-D [Member] CPS 2018-A [Member] CPS 2018-B [Member] CPS 2018-C [Member] CPS 2018-D [Member] CPS 2019-A [Member] CPS 2019-B [Member] CPS 2019-C [Member] CPS 2019-D [Member] CPS 2020-A [Member] CPS 2020-B [Member] CPS 2020-C [Member] CPS 2021-A [Member] CPS 2021-B [Member] CPS 2021 C [Member] CPS 2021 D [Member] CPS 2022 A [Member] CPS 2022 B [Member] Credit Facility [Axis] Warehouse Lines Of Credit 1 [Member] Warehouse Lines Of Credit 2 [Member] Residual interest financing [Member] Residual Interest Financing 1 [Member] Long-Term Debt, Type [Axis] Subordinated renewable notes [Member] Statistical Measurement [Axis] Minimum [Member] Debt Instrument [Axis] Agent Services L P [Member] Maximum [Member] Warehouse Lines Of Credit [Member] Warehouse Lines Of Credit 5 [Member] Securitization Trust Debt [Member] Warehouse lines of credit Income Tax Authority [Axis] Domestic Tax Authority [Member] State and Local Jurisdiction [Member] Fair Value Hierarchy and NAV [Axis] Fair Value, Inputs, Level 3 [Member] Financial Asset, Not Past Due [Member] Repossessed Vehicles [Member] Inventory [Axis] Asset Class [Axis] Carrying Value [Member] Fair Value, Inputs, Level 1 [Member] Fair Value, Inputs, Level 2 [Member] Cover [Abstract] Document Type Amendment Flag Amendment Description Document Registration Statement Document Annual Report Document Quarterly Report Document Transition Report Document Shell Company Report Document Shell Company Event Date Document Period Start Date Document Period End Date Document Fiscal Period Focus Document Fiscal Year Focus Current Fiscal Year End Date Entity File Number Entity Registrant Name Entity Central Index Key Entity Primary SIC Number Entity Tax Identification Number Entity Incorporation, State or Country Code Entity Address, Address Line One Entity Address, Address Line Two Entity Address, Address Line Three Entity Address, City or Town Entity Address, State or Province Entity Address, Country Entity Address, Postal Zip Code Country Region City Area Code Local Phone Number Extension Written Communications Soliciting Material Pre-commencement Tender Offer Pre-commencement Issuer Tender Offer Title of 12(b) Security No Trading Symbol Flag Trading Symbol Security Exchange Name Title of 12(g) Security Security Reporting Obligation Annual Information Form Audited Annual Financial Statements Entity Well-known Seasoned Issuer Entity Voluntary Filers Entity Current Reporting Status Entity Interactive Data Current Entity Filer Category Entity Small Business Entity Emerging Growth Company Elected Not To Use the Extended Transition Period Document Accounting Standard Other Reporting Standard Item Number Entity Shell Company Entity Public Float Entity Bankruptcy Proceedings, Reporting Current Entity Common Stock, Shares Outstanding Documents Incorporated by Reference [Text Block] Statement [Table] Statement [Line Items] ASSETS Cash and cash equivalents Restricted cash and equivalents Finance receivables measured at fair value Finance receivables Less: Allowance for finance credit losses Finance receivables, net Furniture and equipment, net Deferred tax assets, net Accrued interest receivable Other assets Total Assets LIABILITIES AND SHAREHOLDERS' EQUITY Liabilities Accounts payable and accrued expenses Warehouse lines of credit Residual interest financing Securitization trust debt Subordinated renewable notes Total liabilities COMMITMENTS AND CONTINGENCIES Shareholders' Equity Preferred Stock, Value, Issued Common stock, no par value; authorized 75,000,000 shares; 21,206,839 and 21,143,764 shares issued and outstanding at June 30, 2022 and December 31, 2021, respectively Retained earnings Accumulated other comprehensive loss Total stockholders’ equity Total liability and stockholder’ equity Preferred stock, par value (in dollars per share) Preferred stock, authorized Preferred stock, issued Common stock, no par value (in dollars per share) Common Stock, Shares Authorized Common Stock, Shares, Issued Common Stock, Shares, Outstanding Income Statement [Abstract] Revenues: Interest income Mark to finance receivables measured at fair value Other income Total revenues Expenses: Employee costs General and administrative Interest Provision for credit losses Sales Occupancy Depreciation and amortization Total operating expenses Income before income tax expense (benefit) Income tax expense (benefit) Net income Earnings per share: Basic Diluted Number of shares used in computing earnings per share: Basic Diluted Net income Other comprehensive income/(loss); change in funded status of pension plan Comprehensive income Statement of Cash Flows [Abstract] Cash flows from operating activities: Adjustments to reconcile net income to net cash provided by operating activities: Accretion of deferred acquisition fees and origination costs Net interest income accretion on fair value receivables Amortization of deferred financing costs Mark to finance receivables measured at fair value Provision for credit losses Stock-based compensation expense Changes in assets and liabilities: Accrued interest receivable Deferred tax assets, net Other assets Accounts payable and accrued expenses Net cash provided by operating activities Cash flows from investing activities: Payments received on finance receivables held for investment Purchases of finance receivables measured at fair value Payments received on finance receivables at fair value Change in repossessions held in inventory Purchase of furniture and equipment Net cash provided by (used in) investing activities Cash flows from financing activities: Proceeds from issuance of securitization trust debt Proceeds from issuance of subordinated renewable notes Payments on subordinated renewable notes Net proceeds from (repayments of) warehouse lines of credit Net proceeds from (repayment of) residual interest financing debt Repayment of securitization trust debt Payment of financing costs Purchase of common stock Exercise of options and warrants Net cash provided by (used in) financing activities Increase (decrease) in cash and cash equivalents Cash and restricted cash  at beginning of period Cash and restricted cash at end of period Supplemental disclosure of cash flow information: Cash paid (received) during the period for: Interest Income taxes Balance, beginning of period, Shares Balance, beginning of period Pension benefit obligation Common stock issued upon exercise of options and warrants, Shares Common stock issued upon exercise of options and warrants Repurchase of common stock, Shares Repurchase of common stock Stock-based compensation Balance, end of period, Shares Balance, end of period Accounting Policies [Abstract] (1) Summary of Significant Accounting Policies Finance Receivables (2) Finance Receivables Securitization Trust Debt (3) Securitization Trust Debt Debt Disclosure [Abstract] (4) Debt Interest Income And Interest Expense (5) Interest Income and Interest Expense Earnings Per Share [Abstract] (6) Earnings Per Share Income Tax Disclosure [Abstract] (7) Income Taxes Commitments and Contingencies Disclosure [Abstract] (8) Legal Proceedings Fair Value Disclosures [Abstract] (9) Fair Value Measurements Subsequent Events [Abstract] (10) Subsequent Events Description of Business Basis of Presentation Use of Estimates Finance Receivables Measured at Fair Value Other Income Leases Stock-based Compensation Purchases of Company Stock Reclassifications Financial Covenants Provision for Contingent Liabilities Schedule of other income Supplemental balance sheet information related to leases Schedule of maturities of lease liabilities Lease information Supplemental cash flow information related to leases Share-based payment arrangement option activity Schedule of stock options outstanding and exercisable Schedule of purchases of company stock Schedule of delinquency status of finance receivables Schedule of amortized cost basis of finance receivables Schedule of allowance for finance credit losses Schedule of allowance for losses on repossessed inventory Schedule of Long-term Debt Instruments Schedule of debt outstanding Schedule of interest income Schedule of interest expense Computation of earnings per share Schedule of reconciliation of the finance receivables measured at fair value on a recurring basis Finance receivables fair and contractual balances Schedule of level 3 fair value measurements Schedule of delinquency status of finance receivables measured at fair value Schedule of estimated fair values of financial assets and liabilities Other Operating Income Operating Leases Operating lease right-of-use assets Less: Accumulated amortization right-of-use assets Operating lease right-of-use assets, net Operating lease liabilities Finance Leases Property and equipment, at cost Less: Accumulated depreciation Property and equipment, net Finance lease liabilities Operating Lease, Weighted Average Discount Rate, Percent Finance Lease, Weighted Average Discount Rate, Percent 2022 2022 2023 2023 2024 2024 2025 2025 2026 Thereafter Thereafter Total undiscounted lease payments Total undiscounted lease payments Less amounts representing interest Less amounts representing interest Lease Liability Lease Liability Operating lease cost Finance lease cost Total lease cost Cash paid for amounts included in the measurement of lease liabilities: Operating cash flows from operating leases Operating cash flows from finance leases Financing cash flows from finance leases Schedule of Share-Based Compensation Arrangements by Share-Based Payment Award [Table] Share-Based Compensation Arrangement by Share-Based Payment Award [Line Items] Options outstanding Options outstanding, per share Granted Granted, per share Exercised Exercised, per share Forfeited Forfeited, per share Options outstanding Options outstanding, per share Options Outstanding, Weighted Average Remaining Contractual Term Options exercisable at the end of period Options exercisable at the end of period Options Exercisable, Weighted Average Remaining Contractual Term Share-Based Payment Arrangement, Option, Exercise Price Range [Table] Share-Based Payment Arrangement, Option, Exercise Price Range [Line Items] Number of shares, outstanding Number of shares, exercisable Class of Treasury Stock [Table] Equity, Class of Treasury Stock [Line Items] Total stock purchases, shares Total stock purchases, average price per share Portfolio value Stock-based compensation Unrecognized stock-based compensation costs Weighted-average period for unrecognized costs Intrinsic value options outstanding Intrinsic value of options exercisable Options exercised Intrinsic value of options exercised Shares available for grant Financing Receivable, Past Due [Table] Financing Receivable, Past Due [Line Items] Finance receivables Amortized cost basis Balance at beginning of period Financing Receivable, Allowance for Credit Loss, Ending Balance Provision for credit losses on finance receivables Charge-offs Recoveries Financing Receivable, Allowance for Credit Loss, Ending Balance Gross balance of repossessions in inventory Allowance for losses on repossessed inventory Net repossessed inventory included in other assets Interest Receivable Finance receivables, non accrual status Debt Securities, Held-to-Maturity, Allowance for Credit Loss [Table] Debt Securities, Held-to-Maturity, Allowance for Credit Loss [Line Items] Final Scheduled Payment Date Receivables Pledged at end of period Initial Principal Outstanding Principal Weighted Average Contractual Interest Rate Securitization Trust Debt, payable in 2022 Securitization Trust Debt, payable in 2023 Securitization Trust Debt, payable in 2024 Securitization Trust Debt, payable in 2025 Securitization Trust Debt, payable in 2026 Securitization Trust Debt, payable in 2027 Securitization Trust Debt, payable in 2028 Debt issuance costs Restricted cash under various agreements Line of Credit Facility [Table] Line of Credit Facility [Line Items] Interest rate Maturity date description Interest rate Debt Instrument, Interest Rate Terms Total debt outstanding Schedule of Long-Term Debt Instruments [Table] Debt Instrument [Line Items] Line of credit outstanding facility amount Line of credit maximum amount Unamortized debt issuance costs Interest on finance receivables Interest on finance receivables at fair value Other interest income Interest income Total interest expense Weighted average number of common shares outstanding during the period used to compute basic earnings per share Incremental common shares attributable to exercise of outstanding options and warrants Weighted average number of common shares used to compute diluted earnings per share Antidilutive shares Operating Loss Carryforwards [Table] Operating Loss Carryforwards [Line Items] Net deferred tax asset Current income tax expense Effective Income Tax Rate Reconciliation, Percent Balance at beginning of period Finance receivables at fair value acquired during period Payments received on finance receivables at fair value Net interest income accretion on fair value receivables Mark to fair value Receivables, Fair Value Disclosure Finance receivables contractual balance Receivables, Fair Value Disclosure Fair Value, Recurring and Nonrecurring [Table] Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] Discount Rate on Finance Receivables Cumulative Net Losses (Percent) on Finance Receivables Initial Principal Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Table] Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items] Finance receivables, net Warehouse lines of credit Accrued interest payable Securitization trust debt Inventory, Current [Table] Inventory [Line Items] Net repossessed inventory included in other assets Direct Mail Revenues Member Amount of interest for operating leases having an initial or remaining non-cancelable letter. Finance lease cost Final Scheduled Payment Date Information by major type of debt and equity securit Securitization Trust Debt Initial Principal Information by major type of debt and equity securit Information by major type of debt and equity securit Information by major type of debt and equity securit Represent Information by major type of debt and equity security. CPS 2021-B [Member] Warehouse Lines Of Credit 2 Member Residual Interest Financing Member. Subordinated Renewable Notes. Information by warehouse line of credit. Securitization Trust Debt Member Warehouse Lines Of Credit Member Finance receivables measured at fair value. Repossessed Vehicles [Member] Finance receivables, net at fair value Financing Receivable, after Allowance for Credit Loss, Current Warehouse Agreement Borrowings Liabilities [Default Label] Liabilities and Equity Revenues Operating Expenses Net Income (Loss), Including Portion Attributable to Noncontrolling Interest Comprehensive Income (Loss), Net of Tax, Attributable to Noncontrolling Interest Increase (Decrease) in Accrued Interest Receivable, Net Increase (Decrease) in Prepaid Expense and Other Assets Increase (Decrease) in Other Operating Assets Increase (Decrease) in Accounts Payable and Accrued Liabilities Net Cash Provided by (Used in) Operating Activities Payments for (Proceeds from) Loans Receivable ChangeInRepossessionsInInventory Payments to Acquire Property, Plant, and Equipment Net Cash Provided by (Used in) Investing Activities Repayments of Medium-term Notes NetProceedsFromRepaymentOfResidualInterestFinancingDebt Repayments of Secured Debt Payments of Financing Costs Payments for Repurchase of Common Stock Net Cash Provided by (Used in) Financing Activities Cash, Cash Equivalents, Restricted Cash, and Restricted Cash Equivalents, Period Increase (Decrease), Excluding Exchange Rate Effect Cash, Cash Equivalents, Restricted Cash, and Restricted Cash Equivalents Interest Paid, Excluding Capitalized Interest, Operating Activities Shares, Outstanding Stock Repurchased During Period, Value Accumulated amortization right of use assets Finance lease right of use asset accumulated depreciation Finance Lease, Liability Finance Lease, Liability, to be Paid, Year One Finance Lease, Liability, to be Paid, Year Two Finance Lease, Liability, to be Paid, Year Three Finance Lease, Liability, to be Paid, Year Four Finance Lease, Liability, to be Paid, after Year Five Finance Lease, Liability, to be Paid Operating Leases Future Minimum Payments Due Interest Lessee, Operating Lease, Liability, Undiscounted Excess Amount Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Outstanding, Weighted Average Exercise Price Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Forfeitures in Period Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Exercisable, Weighted Average Exercise Price Share-Based Payment Arrangement, Noncash Expense Financing Receivable, before Allowance for Credit Loss Accounts Receivable, Allowance for Credit Loss, Writeoff Debt Instrument, Interest Rate During Period Interest and Dividend Income, Operating PaymentsOnFinanceReceivablesAtFairValue FinanceReceivablesMeasuredAtFairValue Line of Credit, Current Secured Debt Repossessed Assets