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Discounts and Premiums, Investments Total liabilities and shareholders' equity Liabilities and Equity Peer Group Total Shareholder Return Amount Peer Group Total Shareholder Return Amount Investment Company, Income and Expense [Abstract] Investment Company, Income and Expense [Abstract] Right of use assets Operating Lease, Right-of-Use Asset Schedule of Long-Term Debt Instruments [Table] Schedule of Long-Term Debt Instruments [Table] Commercial & Industrial Commercial and Industrial Loans [Member] Commercial and Industrial Loans Federal Home Loan Bank and Federal Reserve Bank stock Federal Home Loan Bank Stock and Federal Reserve Bank Stock Equity Valuation Assumption Difference, Footnote Equity Valuation Assumption Difference, Footnote [Text Block] Deferred fees and costs Financing Receivable, before Allowance for Credit Loss, Deferred Loan Fees Financing Receivable, before Allowance for Credit Loss, Deferred Loan Fees Undistributed net income Undistributed Earnings, Basic Arrangement Duration Trading Arrangement Duration Total expenses Investment Income, Investment Expense Entity Address, City or Town Entity Address, City or Town Award Timing MNPI Considered Award Timing MNPI Considered [Flag] Schedule of segments Schedule of Segment Reporting Information, by Segment [Table Text Block] Related Party Related Party [Member] Pledged for borrowings and other Pledged for Borrowings [Member] Pledged for Borrowings Newtek Merchant Solutions, LLC Newtek Merchant Solutions, LLC [Member] Newtek Merchant Solutions, LLC Investment sale Investment Owned, Sales Investment Owned, Sales Net increase in Federal Home Loan and Federal Reserve Bank stock Increase (Decrease) in Loans to Federal Home Loan Banks Fair Value Fair Value of Financial Instruments, Policy [Policy Text Block] Derivative Instruments and Hedging Activities Disclosures [Table] Derivative Instruments and Hedging Activities Disclosures [Table] Termination Date Trading Arrangement Termination Date Transaction costs Business Acquisition, Transaction Costs Common stock, shares authorized (in shares) Common Stock, Shares Authorized Document Information [Table] Document Information [Table] Financial Asset, Aging [Axis] Financial Asset, Aging [Axis] Unrealized Gains Debt Securities, Available-for-Sale, Accumulated Gross Unrealized Gain, before Tax Transportation Equipment Manufacturing Transportation Equipment Manufacturing [Member] Transportation Equipment Manufacturing Book value multiples Measurement Input, Book Value Multiple [Member] Measurement Input, Book Value Multiple Related Party Transactions [Abstract] Measurement Input Type [Axis] Measurement Input Type [Axis] Investment holdings, schedule of investments Investment Holdings, Schedule of Investments [Table Text Block] Award Timing Disclosures [Line Items] Number of sponsor banks Number of Sponsor Banks Number of Sponsor Banks Thereafter Employment Agreement, To Be Paid, After Year Five Employment Agreement, To Be Paid, After Year Five Dividends payable Dividends Payable Total assets acquired Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Assets Schedule of Accounts, Notes, Loans and Financing Receivable [Table] Schedule of Accounts, Notes, Loans and Financing Receivable [Table] Aggregate amount of deposit accounts that exceeded the FDIC limit Time Deposits, at or Above FDIC Insurance Limit Additional paid-in capital Additional Paid in Capital Document Information [Line Items] Document Information [Line Items] NBL Capital One Facility SPV Capital One Facility [Member] SPV Capital One Facility Weighted average life Financing Receivable, Weighted Average Life Financing Receivable, Weighted Average Life Income Taxes Income Tax, Policy [Policy Text Block] 2026 Finite-Lived Intangible Asset, Expected Amortization, Year Three Loans held for investment, at amortized cost, net of deferred fees and costs Total Loans Total Carried at Amortized Cost Financing Receivable, before Allowance for Credit Loss Insider Trading Arrangements [Line Items] 2025 6.85% Notes 2025 6.85% Notes [Member] 2025 6.85% Notes Other general and administrative costs Other General and Administrative Expense Related Party [Axis] Related Party, Type [Axis] Changes In Valuation Inputs or Adjustments Changes In Valuation Inputs or Adjustments [Member] Changes In Valuation Inputs or Adjustments Entity Registrant Name Entity Registrant Name Material Terms of Trading Arrangement Material Terms of Trading Arrangement [Text Block] Award Timing Method Award Timing Method [Text Block] Other assets Increase (Decrease) in Other Operating Assets Change in presentation Conversion from Business Development Company to Bank, Change in Presentation Conversion from Business Development Company to Bank, Change in Presentation 2025 Finite-Lived Intangible Asset, Expected Amortization, Year Two Equity warrants Warrants and Rights Outstanding Adjustment to Compensation, Amount Adjustment to Compensation Amount Investment, Issuer Affiliation [Axis] Investment, Issuer Affiliation [Axis] Other Real Estate Owned Other Real Estate Owned [Member] Other Real Estate Owned Distributions Investment Company, Distribution [Policy Text Block] Purchase of loans held for sale Payment for Purchase, Loan, Held-for-Sale Compensation Actually Paid vs. Net Income Compensation Actually Paid vs. Net Income [Text Block] Number of merchant processors Number of Merchant Processors Number of Merchant Processors Peer Group Issuers, Footnote Peer Group Issuers, Footnote [Text Block] Schedule of fair value, assets and liabilities measured on recurring basis Schedule of Fair Value, Assets and Liabilities Measured on Recurring Basis [Table Text Block] Software Development Costs Internal Use Software, Policy [Policy Text Block] Allocation of Undistributed Net Income - Common, percent Earnings Per Share, Allocation of Undistributed Net Income, Common Stock, Percentage Earnings Per Share, Allocation of Undistributed Net Income, Common Stock, Percentage Entity Central Index Key Entity Central Index Key Unguaranteed Investments Accrual Unguaranteed Accrual Investments [Member] Unguaranteed Accrual Investments Gain (loss) included in earnings Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Gain (Loss) Included in Earnings Stock-based compensation expense Share-Based Payment Arrangement, Expense Non-Rule 10b5-1 Arrangement Terminated Non-Rule 10b5-1 Arrangement Terminated [Flag] Gross carrying Amount Finite-Lived Intangible Assets, Gross Current principal amount Federal Home Loan Bank, Advance Payments of deferred financing costs Payments of Financing Costs Name Trading Arrangement, Individual Name Other comprehensive income (loss), net of tax Other comprehensive income (loss), net of tax Other Comprehensive Income (Loss), Net of Tax, Portion Attributable to Parent Issuance of stock Aggregate purchase price Issuance of Preferred stock Stock Issued During Period, Value, New Issues Lower of Cost or Market Lower of Cost or Market [Member] Lower of Cost or Market Time deposit maturities Time Deposit Maturities [Table Text Block] Entity [Domain] Entity [Domain] Cost Financing Receivable, before Allowance for Credit Loss, Amortized Cost, Industry Loans Financing Receivable, before Allowance for Credit Loss, Amortized Cost, Industry Loans Long-Term Debt, Type [Axis] Long-Term Debt, Type [Axis] Amendment Flag Amendment Flag Legal Entity [Axis] Legal Entity [Axis] Net unrealized depreciation on investments Unrealized Gain (Loss), Investment and Derivative, Operating, after Tax Risk Grades 5-6 Risk Grades 5-6 [Member] Risk Grades 5-6 Tax Period [Domain] Tax Period [Domain] Operating Lease, Weighted Average Discount Rate, Percent Operating Lease, Weighted Average Discount Rate, Percent Interest paid Interest Paid, Excluding Capitalized Interest, Operating Activities Net interest income Net interest income Interest Income (Expense), Net SBA SBA investment SBA 7(a) Loan [Member] SBA 7(a) Loan Maturing within 1 year Debt Securities, Available-for-Sale, Fair Value, Maturity, Allocated and Single Maturity Date, Year One Total Employment Agreement, To Be Paid Employment Agreement, To Be Paid Core Deposits Core Deposits [Member] Business Combinations Business Combinations Policy [Policy Text Block] Leasehold Improvements Leasehold Improvements [Member] Net realized gain on investments Realized Gain (Loss), Investment and Derivative, Operating, after Tax Diluted weighted average shares outstanding (in shares) Weighted Average Number of Shares Outstanding, Diluted Forgone Recovery, Explanation of Impracticability Forgone Recovery, Explanation of Impracticability [Text Block] Deposits Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Deposits Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Deposits Time Deposit Maturities, After Year Four Time Deposit Maturities, After Year Four Time Deposit Maturities, After Year Four Commitment Fair Value Disclosure, off-Balance-Sheet Risks, Amount, Liability 2026 Notes 2026 Notes [Member] 2026 Notes Interest expense Operating Expenses [Abstract] Recoveries Financing Receivable, Allowance for Credit Loss, Recovery Due to participants Increase (Decrease) In Due To Participants Increase (Decrease) In Due To Participants Electronic payment processing expense Electronic Payment Processing Expense Electronic Payment Processing Expense Purchase of fixed assets Payments to Acquire Property, Plant, and Equipment Company Selected Measure Amount Company Selected Measure Amount Investments, Owned, Federal Income Tax Note [Line Items] Investments, Owned, Federal Income Tax Note [Line Items] Total assets Collateralized deposit Assets Assets Name Awards Close in Time to MNPI Disclosures, Individual Name Stock-based compensation expense, net of forfeitures APIC, Share-Based Payment Arrangement, Increase for Cost Recognition Salaries and employee benefits expense Labor and Related Expense Bank notes payable Notes Payable to Bank Non-NEOs Non-NEOs [Member] Purchase of loans Related Party Transaction, Purchases from Related Party Net unrealized depreciation on servicing assets Unrealized Gain (Loss) On Servicing Assets Unrealized Gain (Loss) On Servicing Assets Joint Ventures Investment, Affiliated Issuer, Controlled, Not Majority-Owned [Member] Other comprehensive loss before tax Other Comprehensive Income (Loss), before Tax, Portion Attributable to Parent Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward] Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward] Savings Interest-Bearing Domestic Deposit, Savings Cash flows from financing activities: Net Cash Provided by (Used in) Financing Activities [Abstract] Weighted average cost of capital Measurement Input, Weighted-Average Cost of Capital [Member] Measurement Input, Weighted-Average Cost of Capital Non-PEO NEO Non-PEO NEO [Member] Debt securities available-for-sale, at fair value Marketable Securities Adjustment to Compensation: Adjustment to Compensation [Axis] Debt service coverage, minimum Debt Instrument, Service Coverage Ratio, Minimum Debt Instrument, Service Coverage Ratio, Minimum Basic weighted average shares outstanding (in shares) Weighted Average Number of Shares Outstanding, Basic Debt Instrument [Line Items] Debt Instrument [Line Items] EBITDA multiples-NTM Measurement Input, EBITDA Multiple, Next Twelve Months [Member] Measurement Input, EBITDA Multiple, Next Twelve Months Reclassifications Reclassification, Comparability Adjustment [Policy Text Block] Interest income Revenues [Abstract] 2024 Contractual Obligation, to be Paid, Year Two Time Deposit Maturities, Year Three Time Deposit Maturities, Year Three Interest bearing deposits in banks Interest Bearing Deposits in Banks [Policy Text Block] Interest Bearing Deposits in Banks Pay vs Performance Disclosure Pay vs Performance Disclosure [Table] Statement [Line Items] Statement [Line Items] Due to participants Due To Participants Due To Participants Available-for-sale maturity and other information Debt Securities, Available-for-Sale [Table Text Block] Net gain (loss) on loans under the fair value option Net (gain) loss on loans accounted for under the fair value option Unrealized Gain (Loss) on Sales of Loans, Net, Fair Value Option Unrealized Gain (Loss) on Sales of Loans, Net, Fair Value Option Social Assistance Social Assistance [Member] Social Assistance Salvatore Mulia [Member] Salvatore Mulia