Cover [Abstract] Document Information [Table] Class of Stock [Axis] Class of Stock [Domain] Common Stock [Member] Common Stock Cumulative Preferred Stock [Member] Cumulative Preferred Stock Document Information [Line Items] Document Type Document Type Document Quarterly Report Document Period End Date Document Period End Date Document Fiscal Year Focus Document Fiscal Year Focus Document Transition Report Securities Act File Number Entity Registrant Name Entity Registrant Name Entity Incorporation, State or Country Code Entity Tax Identification Number Entity Address, Address Line One Entity Address, Address Line Two Entity Address, City or Town Entity Address, State or Province Entity Address, Postal Zip Code City Area Code Local Phone Number Title of 12(b) Security Trading Symbol Trading Symbol Security Exchange Name Entity Current Reporting Status Entity Current Reporting Status Entity Interactive Data Current Entity Filer Category Entity Filer Category Entity Small Business Entity Emerging Growth Company Entity Shell Company Entity Common Stock, Shares Outstanding Entity Common Stock, Shares Outstanding Current Fiscal Year End Date Current Fiscal Year End Date Entity Central Index Key Entity Central Index Key Document Fiscal Period Focus Document Fiscal Period Focus Amendment Flag Amendment Flag Statement of Financial Position [Abstract] Statement [Table] Statement [Line Items] Assets [Abstract] Real Estate Investment Property, Net [Abstract] Real Estate Investment Property, at Cost [Abstract] Real Estate: Land Land, at Cost Investment Building and Building Improvements Building and Improvements, at Cost Real Estate Investment Property, at Cost Total Real Estate, at Cost Real Estate Investment Property, Accumulated Depreciation Less, Accumulated Depreciation Real Estate Investment Property, Net Real Estate - Net Real Estate, Held-for-Sale Assets Held for Sale Total Assets Held for Sale Mortgage Loans on Real Estate, Commercial and Consumer, Net Commercial Loans and Investments Total Commercial Loans and Investments Cash and Cash Equivalent Cash and Cash Equivalents Restricted Cash Restricted Cash Intangible Asset, Finite-Lived, after Accumulated Amortization Intangible Lease Assets - Net Sub-total Intangible Lease Assets - Net Deferred Rent Receivables, Net Straight-Line Rent Adjustment Prepaid Expense and Other Assets Other Assets Total Other Assets Assets Identifiable Assets Total Assets Liabilities and Equity [Abstract] Liabilities [Abstract] Liabilities: Amount of Accounts Payable, Accrued Expenses and Other Liabilities. Accounts Payable, Accrued Expenses and Other Liabilities Accounts Payable, Accrued Expenses, and Other Liabilities Total Accounts Payable, Accrued Expenses, and Other Liabilities Amount of Prepaid Rent and Deferred Revenue. Prepaid Rent and Deferred Revenue Prepaid Rent and Deferred Revenue Below Market Lease, Net Sub-total Intangible Lease Liabilities - Net Intangible Lease Liabilities - Net Participating Mortgage Loans, Mortgage Obligations, Amount Obligation Under Participation Agreement Long-Term Debt Long-Term Debt - Net Total Long-Term Debt Total Long-Term Debt Liabilities Total Liabilities Commitments and Contingencies Commitments and Contingencies - See Note 20 Equity, Attributable to Parent [Abstract] Equity: Preferred Stock, Value, Issued Preferred Stock, 100 million shares authorized, $0.01 par value per share, 8.00% Series A Cumulative Redeemable Preferred Stock, $25.00 Per Share Liquidation Preference, 2,489,747 shares issued and outstanding as of September 30, 2026 and 2,083,328 shares issued and outstanding as of December 31, 2025 Common Stock, Value, Issued Common Stock, $0.01 par value per share, 500 million shares authorized, 17,935,407 shares issued and outstanding as of September 30, 2026 and 14,783,419 shares issued and outstanding as of December 31, 2025 Additional Paid in Capital, Common Stock Additional Paid-in Capital Retained Earnings (Accumulated Deficit) Dividends in Excess of Net Income Accumulated Other Comprehensive Income (Loss), Net of Tax Accumulated Other Comprehensive Income Equity, Attributable to Parent Stockholders' Equity Equity, Attributable to Noncontrolling Interest Noncontrolling Interest Equity, Including Portion Attributable to Noncontrolling Interest Balance Balance Total Equity Liabilities and Equity Total Liabilities and Equity Stockholders' Equity, Number of Shares, Par Value and Other Disclosure [Abstract] Preferred Stock, Number of Shares, Par Value and Other Disclosure [Abstract] Preferred Stock Preferred Stock, Shares Authorized Preferred stock, shares authorized (in shares) Preferred Stock, Par or Stated Value Per Share Preferred stock, par value (in dollars per share) Preferred Stock, Dividend Rate, Percentage Preferred stock, dividend rate (as a percent) Preferred Stock, Liquidation Preference Per Share Preferred stock, liquidation preference (in dollars per share) Preferred Stock, Shares Issued Preferred stock, shares issued (in shares) Preferred Stock, Shares Outstanding Preferred stock, shares outstanding (in shares) Common Stock, Number of Shares, Par Value and Other Disclosure [Abstract] Common Stock Common Stock, Par or Stated Value Per Share Common stock, par value (in dollars per share) Common Stock, Shares Authorized Common stock, shares authorized (in shares) Common Stock, Shares, Issued Common stock, shares issued (in shares) Common Stock, Shares, Outstanding Common stock, shares outstanding (in shares) Income Statement [Abstract] Net Income (Loss) Available to Common Stockholders, Basic [Abstract] Net Income (Loss) Attributable to Parent [Abstract] CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (LOSS) Net Income (Loss), Including Portion Attributable to Noncontrolling Interest [Abstract] Income (Loss) from Continuing Operations, Net of Tax, Including Portion Attributable to Noncontrolling Interest [Abstract] Income (Loss) from Continuing Operations before Income Taxes, Noncontrolling Interest [Abstract] Income (Loss) from Continuing Operations before Equity Method Investments, Income Taxes, Noncontrolling Interest [Abstract] Operating Income (Loss) [Abstract] Gross Profit [Abstract] Revenues [Abstract] Revenues: Operating Lease, Lease Income Lease Income Total Lease Income Interest and Fee Income, Loans, Commercial, Real Estate Interest Income from Commercial Loans and Investments Revenue Not from Contract with Customer, Other Other Revenue Other Revenues Revenues Total Revenues Total Revenues Cost of Revenue [Abstract] Operating Expenses: Cost of Revenue Real Estate Expenses General and Administrative Expense General and Administrative Expenses General and Administrative Expenses Asset Impairment Charges and Allowance for Credit Loss (Adjustments) Asset Impairment Charges and Allowance for Credit Loss (Adjustments) Provision for Impairment and Adjustment to CECL Reserve Depreciation, Depletion and Amortization Depreciation and Amortization Costs and Expenses, Excluding Gain (Loss) on Disposition of Assets Costs and Expenses, Excluding Gain (Loss) on Disposition of Assets Total Revenues Less Operating Expenses Total Operating Expenses Gain (Loss) on Disposition of Assets Gain on Disposition of Assets Gain (Loss) on Disposition of Assets Operating Income (Loss) Net Income From Operations Net Income From Operations Investment Income, Net Investment and Other Income Interest Expense, Nonoperating Interest Expense Net Income (Loss), Including Portion Attributable to Noncontrolling Interest Net Income (Loss) Net Income (Loss) Net Income (Loss) Attributable to Noncontrolling Interest Less: Net Loss (Income) Attributable to Noncontrolling Interest Net Loss (Income) Attributable to Noncontrolling Interest Net Income (Loss) Attributable to Parent Net Income (Loss) Attributable to Alpine Income Property Trust, Inc. Redeemable Preferred Stock Dividends Less: Distributions to Preferred Stockholders Net Income (Loss) Available to Common Stockholders, Basic Net Income (Loss) Attributable to Common Stockholders - Basic Net Income (Loss) Attributable to Common Stockholders Earnings Per Share, Diluted [Abstract] Per Common Share Data: Earnings Per Share, Basic Basic (in dollars per share) Earnings Per Share, Diluted Diluted (in dollars per share) Weighted Average Number of Shares Outstanding, Diluted [Abstract] Weighted Average Number of Common Shares: Weighted Average Number of Shares Outstanding, Basic Weighted Average Number of Common Shares Outstanding (in shares) Basic (in shares) Weighted Average Number of Shares Outstanding, Diluted Total Shares Applicable to Diluted Earnings per Share (in shares) Diluted (in shares) Statement of Comprehensive Income [Abstract] Comprehensive Income (Loss), Net of Tax, Including Portion Attributable to Noncontrolling Interest [Abstract] Other Comprehensive Income (Loss), Net of Tax [Abstract] Other Comprehensive Income (Loss) Other Comprehensive Income (Loss), Cash Flow Hedge, Gain (Loss), after Reclassification and Tax Cash Flow Hedging Derivative - Interest Rate Swaps Other Comprehensive Income (Loss), Net of Tax Other Comprehensive Income (Loss) Total Other Comprehensive Income (Loss) Comprehensive Income (Loss), Net of Tax, Including Portion Attributable to Noncontrolling Interest Total Comprehensive Income (Loss) Comprehensive Income (Loss), Net of Tax, Attributable to Parent [Abstract] Less: Comprehensive Loss (Income) Attributable to Noncontrolling Interest Other Comprehensive Income (Loss), Net of Tax, Portion Attributable to Noncontrolling Interest Other Comprehensive Loss (Income) Attributable to Noncontrolling Interest Comprehensive Income (Loss), Net of Tax, Attributable to Noncontrolling Interest Comprehensive Loss (Income) Attributable to Noncontrolling Interest Comprehensive Income (Loss), Net of Tax, Attributable to Parent Comprehensive Income (Loss) Attributable to Alpine Income Property Trust, Inc. Statement of Stockholders' Equity [Abstract] Equity Components [Axis] Equity Component [Domain] Parent [Member] Parent Preferred Stock [Member] Preferred Stock Additional Paid-in Capital [Member] Additional Paid-in Capital Retained Earnings [Member] Dividends in Excess of Net Income AOCI Attributable to Parent [Member] Accumulated Other Comprehensive Income Noncontrolling Interest [Member] Noncontrolling Interest Increase (Decrease) in Stockholders' Equity [Roll Forward] Increase (Decrease) in Stockholders' Equity Stock Repurchased During Period, Value Stock repurchased during period, value Common Stock Repurchases Stock Issued During Period, Value, Restricted Stock Award, Net of Forfeitures Common Stock Issuances to Directors Stock Issued During Period, Value, New Issues Stock Issuance, Net of Equity Issuance Costs Adjustments to Additional Paid in Capital, Stock Issued, Issuance Costs Payment of Equity Issuance Costs Dividends, Preferred Stock, Cash Preferred Stock Dividends Dividends, Common Stock, Cash Common Stock Dividends Stock Transactions, Parenthetical Disclosure [Abstract] Stock Transactions, Parenthetical Disclosure Preferred Stock, Dividends Per Share, Declared Dividends, declared (in dollars per share) Preferred Stock Dividends (in dollars per share) Common Stock, Dividends, Per Share, Declared Dividends, declared (in dollars per share) Common Stock Dividends (in dollars per share) Statement of Cash Flows [Abstract] Cash Provided by (Used in) Operating Activity, Including Discontinued Operation [Abstract] Cash Flow From Operating Activities: Adjustment to Reconcile Net Income to Cash Provided by (Used in) Operating Activity [Abstract] Adjustments to Reconcile Net Income (Loss) to Net Cash Provided By Operating Activities: Amortization of above and below Market Leases Accretion to Properties Revenue Amortization of Intangible Lease Assets and Liabilities to Lease Income Amortization of Debt Issuance Costs Amortization of Deferred Financing Costs to Interest Expense Amortization of Deferred Financing Costs to Interest Expense Accretion of Commercial Loans and Investments Origination Fees Accretion of Commercial Loans and Investments Origination Fees Accretion of Commercial Loans and Investments Origination Fees Paid-in-Kind Interest, Accrued Paid-in-Kind Interest, Accrued Paid-In-Kind Accrued Interest Paid-in-kind interest, accrued Share-Based Payment Arrangement, Noncash Expense Non-Cash Compensation Increase (Decrease) in Operating Assets [Abstract] Decrease (Increase) in Assets: Increase (Decrease) in Prepaid Rent Straight-Line Rent Adjustment Increase (Decrease) in Other Operating Assets Other Assets Increase (Decrease) in Operating Liabilities [Abstract] Increase (Decrease) in Liabilities: Increase (Decrease) in Accounts Payable and Accrued Liabilities Accounts Payable, Accrued Expenses, and Other Liabilities Increase (Decrease) in Prepaid Rent and Deferred Revenue Increase (Decrease) in Prepaid Rent and Deferred Revenue Prepaid Rent and Deferred Revenue Cash Provided by (Used in) Operating Activity, Including Discontinued Operation Net Cash Provided By Operating Activities Cash Provided by (Used in) Investing Activity, Including Discontinued Operation [Abstract] Cash Flow From Investing Activities: Payments to Acquire Real Estate Acquisition of Real Estate Including Intangible Lease Assets and Liabilities Payments to Develop Real Estate Assets Investments in and Improvements to Real Estate Proceeds from Sale of Productive Assets Proceeds from Disposition of Assets Payments to Acquire Loans Receivable Acquisition of Commercial Loans and Investments Proceeds from Collection of Loans Receivable Principal Payments Received on Commercial Loans and Investments Total proceeds to the company Proceeds from Sale of Mortgage Servicing Rights (MSR) Proceeds from Sale of Participation Interest Payments to Acquire Mortgage Servicing Rights (MSR) Payments on Participation Obligation Cash inflow associated with commercial loan reserves. Proceeds From Commercial Loan Reserves Cash Received for Commercial Loan Reserves Cash Provided by (Used in) Investing Activity, Including Discontinued Operation Net Cash Used In Investing Activities Cash Provided by (Used in) Financing Activity, Including Discontinued Operation [Abstract] Cash Flow from Financing Activities: Proceeds from Issuance of Long-Term Debt Proceeds from Long-Term Debt Repayments of Long-Term Debt Payments on Long-Term Debt Payments of Loan Costs Cash Paid for Loan Fees Payments for Repurchase of Common Stock Repurchases of Common Stock Proceeds from Issuance of Common Stock, Net of Stock Issuance Costs Proceeds from Issuance of Common Stock, Net of Stock Issuance Costs Proceeds From Stock Issuances, Net Proceeds from issuance of common stock, net of stock issuance costs Payments of Ordinary Dividends, Preferred Stock and Preference Stock Dividends Paid - Preferred Stock Dividends Payments of Ordinary Dividends, Common Stock Dividends Paid - Common Stock Dividends Cash Provided by (Used in) Financing Activity, Including Discontinued Operation Net Cash Provided By Financing Activities Cash, Cash Equivalent, Restricted Cash, and Restricted Cash Equivalent, Period Increase (Decrease), Excluding Exchange Rate Effect, Including Discontinued Operation Net Decrease in Cash and Cash Equivalents and Restricted Cash Cash, Cash Equivalent, Restricted Cash, and Restricted Cash Equivalent, Continuing Operation Cash and Cash Equivalents and Restricted Cash, End of Period Cash and Cash Equivalents and Restricted Cash, Beginning of Period Total Cash Supplemental Cash Flow Information [Abstract] Supplemental Disclosure of Cash Flow Information: Interest Paid, Excluding Capitalized Interest, Operating Activity Cash Paid for Interest Total Interest Paid Cash Flow, Noncash Investing and Financing Activities Disclosure [Abstract] Supplemental Disclosure of Non-Cash Investing and Financing Activities: Derivative, Gain (Loss) on Derivative, Net Unrealized Gain (Loss) on Cash Flow Hedge Derivative, Gain (Loss), Statement of Income or Comprehensive Income [Extensible Enumeration] Derivative, Gain (Loss), Statement of Income or Comprehensive Income Cash, Cash Equivalent, Restricted Cash, and Restricted Cash Equivalent, Continuing Operation [Abstract] Reconciliation of Cash to the Consolidated Balance Sheets: Organization, Consolidation and Presentation of Financial Statements [Abstract] Organization, Consolidation and Presentation of Financial Statements Disclosure [Text Block] BUSINESS AND ORGANIZATION Accounting Policies [Abstract]