Trading Arrangements, by Individual Trading Arrangements, by Individual [Table] Number of shares (in thousands) used in computing: Weighted Average Number of Shares Outstanding, Diluted [Abstract] Trading Arrangement: Trading Arrangement [Axis] Weighted Average Remaining Term, Non-vested (in years) Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Outstanding, Weighted-Average Remaining Contractual Term Maximum Maximum [Member] Statistical Measurement [Domain] Statistical Measurement [Domain] Title of 12(b) Security Title of 12(b) Security Document Fiscal Year Focus Document Fiscal Year Focus Adjustment to Compensation, Amount Adjustment to Compensation Amount Number Of Shares Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Nonvested, Number of Shares [Roll Forward] Unrealized rents Deferred Rent Receivables, Net Segment Reporting [Abstract] Segment Reporting [Abstract] Number of consolidated joint ventures Number Of Consolidated Joint Ventures Number Of Consolidated Joint Ventures Schedule of Changes in Restricted Stock Awards Share-Based Payment Arrangement, Restricted Stock and Restricted Stock Unit, Activity [Table Text Block] Vulcan Materials Vulcan Materials [Member] Vulcan Materials Interest carry cost Guarantor Obligations, Maximum Exposure, Undiscounted Restatement Determination Date Restatement Determination Date Altman Logistics Properties, LLC Altman Logistics Properties, LLC [Member] Altman Logistics Properties, LLC The Company's Total Investment Investments in and Advance to Affiliates, Subsidiaries, Associates, and Joint Ventures Multifamily Multifamily Multifamily Segment [Member] Multifamily Segment [Member] Amendment Flag Amendment Flag Entity Common Stock, Shares Outstanding Entity Common Stock, Shares Outstanding Variable rate construction/stabilization loans Construction Loan Performance-based awards Performance Based Option Awards [Member] Performance Based Option Awards [Member] Joint venture management fee revenue Fee Income Income (loss) attributable to noncontrolling interest Income (Loss) Attributable to Noncontrolling Interest, before Tax Top lessee rent percent of revenue (as percent) Top Lessee Rent Percent of Revenue Top Lessee Rent Percent of Revenue Distributions to noncontrolling interests Payments to Noncontrolling Interests Adjustment to Non-PEO NEO Compensation Footnote Adjustment to Non-PEO NEO Compensation Footnote [Text Block] Entity Address, State or Province Entity Address, State or Province PEO Total Compensation Amount PEO Total Compensation Amount Common stock, par value (in dollars per share) Common Stock, Par or Stated Value Per Share Capital expenditures: Segment Reporting, Long-Lived Asset, Expenditure for Addition Non-vested, beginning balance (in shares) Non-vested, ending balance (in shares) Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Nonvested, Number Basic earnings per common share (in shares) Weighted average common shares outstanding during the period – shares used for basic earnings per common share (in shares) Weighted Average Number of Shares Outstanding, Basic Share-Based Payment Arrangement, Tranche One Share-Based Payment Arrangement, Tranche One [Member] Outstanding Aggregate Erroneous Compensation Amount Outstanding Aggregate Erroneous Compensation Amount Construction Loans Construction Loans [Member] Number of reportable segments Number of Reportable Segments Concentration Risk [Table] Concentration Risk [Table] Entity Address, City or Town Entity Address, City or Town Minimum debt yield (as percent) Debt Instrument, Minimum Debt Yield Debt Instrument, Minimum Debt Yield Granted (in shares) Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Grants in Period Minimum pension liability, net of income tax effect Other Comprehensive Income (Loss), Defined Benefit Plan, Gain (Loss) Arising During Period, Tax Share-Based Compensation Arrangement by Share-Based Payment Award [Line Items] Share-Based Compensation Arrangement by Share-Based Payment Award [Line Items] Statement of Financial Position [Abstract] Statement of Financial Position [Abstract] Forfeited (in dollars per share) Share-Based Compensation Arrangement By Share-Based Payment Award, Equity Instruments Other Than Options, Forfeited, Weighted Average Exercise Price Share-Based Compensation Arrangement By Share-Based Payment Award, Equity Instruments Other Than Options, Forfeited, Weighted Average Exercise Price Award Timing MNPI Disclosure Award Timing MNPI Disclosure [Text Block] Vested (in shares) Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Vested in Period Peer Group Total Shareholder Return Amount Peer Group Total Shareholder Return Amount Interest rate (as percent) Line of Credit Facility, Interest Rate at Period End Return of capital from investments in joint ventures Proceeds from Equity Method Investment, Distribution, Return of Capital Beginning balance, Weighted Average Grant Date Fair Value Ending balance, Weighted Average Grant Date Fair Value Share-Based Compensation Arrangement By Share-Based Payment Award, Equity Instruments Other Than Options, Nonvested, Weighted Average Fair Value Share-Based Compensation Arrangement By Share-Based Payment Award, Equity Instruments Other Than Options, Nonvested, Weighted Average Fair Value Total Shareholder Return Vs Peer Group Total Shareholder Return Vs Peer Group [Text Block] Maximum facility amount Line of Credit Facility, Maximum Borrowing Capacity Non-Rule 10b5-1 Arrangement Terminated Non-Rule 10b5-1 Arrangement Terminated [Flag] Schedule of Identifiable Net Assets Segment Reporting, Reconciliation of Asset by Segment to Consolidated [Table Text Block] Loan guarantee expense Interest Expense, Loan Guarantee Interest Expense, Loan Guarantee Secured notes payable Equity Method Investment Summarized Financial Information Notes Payable Equity Method Investment Summarized Financial Information Notes Payable Restricted stock award (shares) Stock Issued During Period, Shares, Restricted Stock Award, Gross Concentration Risk Type [Axis] Concentration Risk Type [Axis] Schedule of Long-Term Debt Instruments [Table] Schedule of Long-Term Debt Instruments [Table] Recently Issued Accounting Standards New Accounting Pronouncements, Policy [Policy Text Block] Noncash accounts payable and accrued liabilities related to investment in properties Capital Expenditures Incurred but Not yet Paid Schedule of Operating Results and Certain Other Financial Data for Business Segments Segment Reporting [Table Text Block] Non- Controlling Interests Noncontrolling Interest [Member] Gain on sale of equipment and property Gain (Loss) on Disposition of Property Plant Equipment Debt cost amortization Amortization of Debt Issuance Costs Related and Nonrelated Parties [Axis] Related and Nonrelated Parties [Axis] Notes payable, net Outstanding debt Borrowed principal Long-Term Debt Number of ground leases Number of Properties Subject to Ground Leases Guarantor Obligations [Line Items] Guarantor Obligations [Line Items] Contingencies Contingencies Disclosure [Text Block] Document Period End Date Document Period End Date Net cash (used in) provided by investing activities Cash Provided by (Used in) Investing Activity, Including Discontinued Operation Equity Awards Adjustments, Excluding Value Reported in Compensation Table Equity Awards Adjustments, Excluding Value Reported in the Compensation Table [Member] Security Exchange Name Security Exchange Name Debt instrument term (in years) Debt Instrument, Term Contributions from noncontrolling interests Proceeds from Noncontrolling Interests Equity Method Investment, Nonconsolidated Investee [Axis] Equity Method Investment, Nonconsolidated Investee [Axis] The Verge Partnership Total JV Verge Joint Venture [Member] Verge Joint Venture Number of acres Area of Land Income taxes, federal Income Tax Paid, Federal, after Refund Received Accumulated other comprehensive income, net Accumulated Other Comprehensive Income (Loss), Net of Tax Entity Shell Company Entity Shell Company Consolidation Items [Domain] Consolidation Items [Domain] Greenville Partnerships Total JV Greenville Woodfield Partnerships Joint Venture [Member] Greenville Woodfield Partnerships Joint Venture Brooksville Joint Venture Brooksville Joint Venture [Member] Brooksville Joint Venture [Member] Mortgages Mortgages [Member] Statement of Comprehensive Income [Abstract] Earnings per Share Earnings Per Share [Text Block] Name Outstanding Recovery, Individual Name Earnings per common share: Earnings Per Share [Abstract] Award Timing, How MNPI Considered Award Timing, How MNPI Considered [Text Block] Document Fiscal Period Focus Document Fiscal Period Focus Peer Group Issuers, Footnote Peer Group Issuers, Footnote [Text Block] Total liabilities Liabilities Trading Symbol Trading Symbol Central Florida Central Florida [Member] Central Florida Geographical [Domain] Geographical [Domain] Investments in properties Payments to Acquire Property, Plant, and Equipment Prior Year End Fair Value of Equity Awards Granted in Any Prior Year that Fail to Meet Applicable Vesting Conditions During Covered Year Prior Year End Fair Value of Equity Awards Granted in Any Prior Year that Fail to Meet Applicable Vesting Conditions During Covered Year [Member] Pension Adjustments Prior Service Cost Pension Adjustments Prior Service Cost [Member] Company Selected Measure Name Company Selected Measure Name Schedule of Income Statements of Verge Partnership Equity Method Investment Summarized Financial Information Investment Income Statements Verge [Table Text Block] EquityMethodInvestmentSummarizedFinancialInformationInvestmentIncomeStatementsVerge Fixed interest rate (as percent) Long-Term Debt, Percentage Bearing Fixed Interest, Percentage Rate Concentration Risk [Line Items] Concentration Risk [Line Items] Greenville Partnerships Greenville Partnerships Greenville Partnerships [Member] Greenville Partnerships [Member] Carrying value of long-term debt Long-Term Debt, Gross Letter of credit fee (as percent) Line of Credit Facility, Commitment Fee Percentage Depreciation and amortization Depreciation, Depletion and Amortization, Nonproduction Credit Facility [Domain] Credit Facility [Domain] Cash flows from operating activities: Cash Provided by (Used in) Operating Activity, Including Discontinued Operation [Abstract] Compensation Amount Outstanding Recovery Compensation Amount Individual: Individual [Axis] Diluted earnings per common share (in shares) Common shares used for diluted earnings per common share (in shares) Weighted Average Number of Shares Outstanding, Diluted Entity Emerging Growth Company Entity Emerging Growth Company Equity Valuation Assumption Difference, Footnote Equity Valuation Assumption Difference, Footnote [Text Block] Line of Credit Facility [Table] Line of Credit Facility [Table] Underlying Security Market Price Change Underlying Security Market Price Change, Percent Cumulative installments (as percent) Share-Based Compensation Arrangement by Share-Based Payment Award, Award Vesting Rights, Percentage Schedule of Share-Based Compensation Arrangements by Share-Based Payment Award [Table] Schedule of Share-Based Compensation Arrangements by Share-Based Payment Award [Table] Award Timing Predetermined Award Timing Predetermined [Flag] Vested, Weighted Average Grant Date Fair Value Share-Based Compensation Arrangement By Share-Based Payment Award, Equity Instruments Other Than Options, Nonvested, Vested In Period, Weighted Average Fair Value Share-Based Compensation Arrangement By Share-Based Payment Award, Equity Instruments Other Than Options, Nonvested, Vested In Period, Weighted Average Fair Value Outstanding letters of credit Letters of Credit Outstanding, Amount Adjustment To PEO Compensation, Footnote Adjustment To PEO Compensation, Footnote [Text Block] Equity-based compensation APIC, Share-Based Payment Arrangement, Increase for Cost Recognition Debt Guaranty Deposit Debt Guaranty Deposit [Member] Debt Guaranty Deposit Common shares issuable under share-based payment plans which are potentially dilutive (in shares) Incremental Common Shares Attributable to Dilutive Effect of Share-Based Payment Arrangements All Executive Categories All Executive Categories [Member] Pension Adjustments Service Cost Pension Adjustments Service Cost [Member] Minimum pension liability, net of income tax effect of $5, $(3), $0, and $(6) Minimum pension liability,net Other Comprehensive Income (Loss), Defined Benefit Plan, Gain (Loss) Arising During Period, after Tax Construction/stabilization loan conditional extension term (in years) Debt Instrument, Term Extension Debt Instrument, Term Extension Fair value of long-term debt Long-Term Debt, Fair Value Loan to value (as percent) Debt Instrument, Loan To Value Ratio Debt Instrument, Loan To Value Ratio Forfeited, Weighted Average Grant Date Fair Value Share-Based Compensation Arrangement By Share-Based Payment Award, Equity Instruments Other Than Options, Forfeited, Weighted Average Fair Value Share-Based Compensation Arrangement By Share-Based Payment Award, Equity Instruments Other Than Options, Forfeited, Weighted Average Fair Value Vesting [Domain] Vesting [Domain] Mining royalty lands Mining royalty lands Mining Royalty Lands Segment [Member] Mining Properties [Member] Outstanding, beginning balance (in dollars per share) Outstanding, ending balance (in dollars per share) Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Outstanding, Weighted Average Exercise Price Vested, Weighted Average Grant Date Fair Value Share-Based Compensation Arrangement By Share-Based Payment Award, Vested, Weighted Average Fair Value Share-Based Compensation Arrangement By Share-Based Payment Award, Vested, Weighted Average Fair Value Concentration Risk Type [Domain] Concentration Risk Type [Domain] Schedule of Investments in Joint Ventures Equity Method Investment Summarized Financial Information Investment In Real Estate Net [Table Text Block] Equity Method Investment Summarized Financial Information Investment In Real Estate Net Accounting Changes and Error Corrections [Abstract] Accounting Changes and Error Corrections [Abstract] Guarantor Obligations, Nature [Axis] Guarantor Obligations, Nature [Axis] Schedule of Basic and Diluted Earnings Per Common Share Schedule of Earnings Per Share, Basic and Diluted [Table Text Block] Fair Value Disclosures [Abstract] Fair Value Disclosures [Abstract] Maximum risk-free interest rate (as percent) Share-Based Compensation Arrangement by Share-Based Payment Award, Fair Value Assumptions, Risk Free Interest Rate, Maximum Debt Disclosure [Abstract] Debt Disclosure [Abstract] Business Segments Segment Reporting [Text Block] Minimum Minimum [Member] Credit Agreement Long-Term Line of Credit Expiration Date Trading Arrangement Expiration Date Industrial Partnerships Industrial Partnerships [Member] Industrial Partnerships Liabilities: Liabilities [Abstract] Non-Rule 10b5-1 Arrangement Adopted Non-Rule 10b5-1 Arrangement Adopted [Flag] Total equity Beginning balance Ending balance Equity, Including Portion Attributable to Noncontrolling Interest Letters of credit expiration period (in years) Line of Credit Facility, Expiration Period Outstanding, Weighted Average Remaining Term (years) Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Outstanding, Weighted-Average Remaining Contractual Term Aggregate Grant Date Fair Value of Equity Award Amounts Reported in Summary Compensation Table Aggregate Grant Date Fair Value of Equity Award Amounts Reported in Summary Compensation Table [Member] Other liabilities Other Liabilities Transfer fee (as percent) Debt Instrument, Transfer Fee Debt Instrument, Transfer Fee Exercisable (in shares) Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Exercisable, Number Aggregate Pension Adjustments Service Cost Aggregate Pension Adjustments Service Cost [Member] Common stock, shares authorized (in shares) Common Stock, Shares Authorized Earnings (loss) per common share: Earnings Per Share Reconciliation [Abstract] Concentrations Concentration Risk Disclosure [Text Block] Number of warehouses Number of Units in Real Estate Property Exercise Price Award Exercise Price Cash flows from investing activities: Cash Provided by (Used in) Investing Activity, Including Discontinued Operation [Abstract] Schedule of Equity Method Investments [Line Items] Schedule of Equity Method Investments [Line Items] Segment Reporting [Line Items] Segment Reporting [Line Items] Unrecognized compensation cost Share-Based Payment Arrangement, Nonvested Award, Cost Not yet Recognized, Amount Document Quarterly Report Document Quarterly Report Year-over-Year Change in Fair Value of Equity Awards Granted in Prior Years That are Outstanding and Unvested Year-over-Year Change in Fair Value of Equity Awards Granted in Prior Years That are Outstanding and Unvested [Member] Segments [Domain] Segments [Domain] Profits interest earned Profits Interest Earned Profits Interest Earned Income taxes payable and receivable Increase (Decrease) in Income Taxes Payable, Net of Income Taxes Receivable Lender Name [Axis] Lender Name [Axis] Accounts receivable, net Accounts receivable Accounts Receivable, after Allowance for Credit Loss Restricted Cash and Cash Equivalents [Axis] Restricted Cash and Cash Equivalents [Axis] Retained earnings Retained earnings (accumulated deficit) for joint ventures Retained Earnings, Unappropriated Letters of credit extension period (in years) Line of Credit Facility, Extension Line of Credit Facility, Extension Awards Close in Time to MNPI Disclosures, Table Awards Close in Time to MNPI Disclosures [Table Text Block] Investments in joint ventures Equity Method Investments Equity Component [Domain] Equity Component [Domain] PEO Actually Paid Compensation Amount PEO Actually Paid Compensation Amount Property taxes Property taxes Real Estate Tax Expense Total cost of operations Costs and Expenses Buildings and improvements Buildings and Improvements, Gross Adoption Date Trading Arrangement Adoption Date Counterparty Name [Domain] Counterparty Name [Domain] Total shareholders’ equity Capital – Third Parties Equity, Attributable to Parent Non-vested, beginning balance (in dollars per share) Non-vested, ending balance (in dollars per share) Share-Based Compensation Arrangement By Share-Based Payment Award, Equity Instruments Other Than Options, Nonvested, Weighted Average Exercise Price Share-Based Compensation Arrangement By Share-Based Payment Award, Equity Instruments Other Than Options, Nonvested, Weighted Average Exercise Price Assets: Assets [Abstract] Title Trading Arrangement, Individual Title Forgone Recovery due to Disqualification of Tax Benefits, Amount Forgone Recovery due to Disqualification of Tax Benefits, Amount Investments in real estate, net Investments In Real Estate, Net Investments In Real Estate, Net Accounting Policies [Abstract] Accounting Policies [Abstract] Restatement does not require Recovery Restatement Does Not Require Recovery [Text Block] Insider Trading Policies and Procedures [Line Items] Outstanding, beginning balance (in shares) Outstanding, ending balance (in shares) Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Outstanding, Number Insider Trading Policies and Procedures Adopted Insider Trading Policies and Procedures Adopted [Flag] Noncontrolling interests Partners' Capital Attributable to Noncontrolling Interest Deferred income taxes Deferred Income Tax Expense (Benefit) Business Combination [Domain] Business Combination [Domain] Security deposit Security Deposit Contributions from partner Noncontrolling Interest, Increase from Subsidiary Equity Issuance Compensation Actually Paid vs. Net Income Compensation Actually Paid vs. Net Income [Text Block] Lease revenue Lease revenue Operating Lease, Lease Income Projects under construction Construction in Progress, Gross Outstanding anti-dilutive stock options (in shares) Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount Entity Central Index Key Entity Central Index Key Common stock, $.10 par value 25,000,000 shares authorized, 19,198,301 and 19,109,541 shares issued and outstanding, respectively Common Stock, Value, Outstanding Less accumulated depreciation and depletion Property, Plant, and Equipment, Accumulated Depreciation, Depletion, and Amortization Capital in excess of par value Additional Paid in Capital, Common Stock All Adjustments to Compensation All Adjustments to Compensation [Member] Deferred costs Equity Method Investment Summarized Financial Information Deferred Costs Equity Method Investment Summarized Financial Information Deferred Costs Unallocated corporate assets Segment Reporting, Reconciling Item, Corporate Nonsegment [Member] Schedule of Guarantor Obligations [Table] Guarantor Obligation [Table] Business Combination [Axis] Business Combination [Axis] Dividends or Other Earnings Paid on Equity Awards not Otherwise Reflected in Total Compensation for Covered Year Dividends or Other Earnings Paid on Equity Awards not Otherwise Reflected in Total Compensation for Covered Year [Member] Net cash provided by operating activities Cash Provided by (Used in) Operating Activity, Including Discontinued Operation Exercisable, Weighted Average Grant Date Fair Value Share-Based Compensation Arrangement By Share-Based Payment Award, Exercisable, Weighted Average Fair Value Share-Based Compensation Arrangement By Share-Based Payment Award, Exercisable, Weighted Average Fair Value Income Statement [Abstract] Income Statement [Abstract] Document Transition Report Document Transition Report Investment, Name [Axis] Investment, Name [Axis] Stock Appreciation Rights (SARs) Stock Appreciation Rights (SARs) [Member] Interest savings (as percent) Debt Instrument, Interest Rate, Increase (Decrease) Vested (in dollars per share) Share-Based Compensation Arrangement By Share-Based Payment Award, Equity Instruments Other Than Options, Nonvested, Vested In Period, Weighted Average Exercise Price Share-Based Compensation Arrangement By Share-Based Payment Award, Equity Instruments Other Than Options, Nonvested, Vested In Period, Weighted Average Exercise Price Number Of Options Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Outstanding [Roll Forward] Interest rate (as percent) Debt Instrument, Basis Spread on Variable Rate City Area Code City Area Code Restricted stock awards Restricted Stock [Member] Accum. Other Comp- rehensive Income (loss), net AOCI Attributable to Parent [Member] All Individuals All Individuals [Member] Schedule of Income Statements of Bryant Street Partnerships Equity Method Investment Summarized Financial Information Investment Income Statements [Table Text Block] Equity Method Investment Summarized Financial Information Investment Income Statements Subsequent Events Subsequent Events [Text Block] Name Forgone Recovery, Individual Name Expected weighted-average period to be recognized (in years) Share-Based Payment Arrangement, Nonvested Award, Cost Not yet Recognized, Period for Recognition Non-GAAP Measure Description Non-GAAP Measure Description [Text Block] Weighted Average Grant Date Fair Value Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Nonvested, Weighted Average Grant Date Fair Value [Abstract] Statement [Line Items] Statement [Line Items] Total assets Identifiable net assets Total Assets of The Partnership Assets Entity [Domain] Entity [Domain] Weighted Average Remaining Term (yrs) Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Additional Disclosures [Abstract] Investment income Investment Income, Net Equity Method Investment, Nonconsolidated Investee [Domain] Equity Method Investment, Nonconsolidated Investee [Domain] Operating segments Operating Segments Operating Segments [Member] Interest expense Interest Expense, Nonoperating Buzzard Point Sponsor, LLC Buzzard Point Sponsor, LLC Buzzard Point Sponsor Partnership [Member] Buzzard Point Sponsor Partnership [Member] Stock-Based Compensation Plans Share-Based Payment Arrangement [Text Block] Interest Rate Swap Conversion Interest Rate Swap Conversion [Member] Interest Rate Swap Conversion PEO PEO [Member] The Company's Share of Profit (Loss) of the Partnership Real Estate Partnership Net Income Loss [Member] Real Estate Partnership Net Income Loss [Member] Cash and Cash Equivalents [Domain] Cash and Cash Equivalents [Domain] The Verge Partnership Verge Partnership The Verge Partnership Company Share Verge [Member] Verge [Member] Time-based awards Time Based Restricted Awards [Member] Time Based Restricted Awards [Member] Stock-based compensation Stock compensation expense Share-Based Payment Arrangement, Expense Goodwill Goodwill Forgone Recovery due to Violation of Home Country Law, Amount Forgone Recovery due to Violation of Home Country Law, Amount Number of extension Debt Instrument, Number Of Extension Debt Instrument, Number Of Extension Retained Earnings Retained Earnings [Member] Operating expenses Operating Expenses Erroneously Awarded Compensation Recovery Erroneously Awarded Compensation Recovery [Table] Forfeited (in shares) Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Forfeitures in Period Increase (Decrease) in Stockholders' Equity [Roll Forward] Increase (Decrease) in Stockholders' Equity [Roll Forward] Common stock, shares outstanding (in shares) Beginning balance (in shares) Ending balance (in shares) Common Stock, Shares, Outstanding Award Timing Disclosures [Line Items] Number of business parks Number Of Business Parks Number Of Business Parks Debt issue costs Payments of Debt Issuance Costs Net income attributable to the Company- Diluted (in dollars per share) Diluted (in dollars per share) Earnings Per Share, Diluted Entity Current Reporting Status Entity Current Reporting Status Net cash (used in) provided by financing activities Cash Provided by (Used in) Financing Activity, Including Discontinued Operation Maximum expected volatility (as percent) Share-Based Compensation Arrangement by Share-Based Payment Award, Fair Value Assumptions, Expected Volatility Rate, Maximum Total Shareholder Return Amount Total Shareholder Return Amount Deferred costs and other assets Increase (Decrease) in Prepaid Expense and Other Assets Capitalized interest costs Interest Costs Capitalized Line of Credit Facility [Line Items] Line of Credit Facility [Line Items] Adjustments to reconcile net income (loss) to net cash provided by operating activities: Adjustment to Reconcile Net Income to Cash Provided by (Used in) Operating Activity [Abstract] Capital recorded by unconsolidated joint ventures Equity Method Investment, Difference Between Carrying Amount and Underlying Equity Seacoast National Bank Seacoast National Bank [Member] Seacoast National Bank Share-Based Payment Arrangement [Abstract] Share-Based Payment Arrangement [Abstract] Cash flows from financing activities: Cash Provided by (Used in) Financing Activity, Including Discontinued Operation [Abstract] Net investments in properties Property, Plant, and Equipment, after Accumulated Depreciation, Depletion, and Amortization Amount available for borrowing Line of Credit Facility, Remaining Borrowing Capacity Commitment fee (as percent) Line of Credit Facility, Unused Capacity, Commitment Fee Percentage Income taxes, state Income Tax Paid, State and Local, after Refund Received Investments in joint ventures Payments to Acquire Interest in Joint Venture Schedule of Investments in Unconsolidated Joint Ventures Equity Method Investments [Table Text Block] Mining royalty and rents Mining Royalty and Rents Mining Royalty and Rents Equity Awards Adjustments, Footnote Equity Awards Adjustments, Footnote [Text Block] Underlying Securities Award Underlying Securities Amount Less comprehensive income (loss) attributable to noncontrolling interests Comprehensive Income (Loss), Net of Tax, Attributable to Noncontrolling Interest Forfeited (in dollars per share) Share-Based Compensation Arrangements by Share-Based Payment Award, Options, Forfeitures in Period, Weighted Average Exercise Price Value of guarantee Value Of Guarantee Value Of Guarantee Profits interests grants Profit Interest Grants [Member] Profit Interest Grants Minimum risk-free interest rate (as percent) Share-Based Compensation Arrangement by Share-Based Payment Award, Fair Value Assumptions, Risk Free Interest Rate, Minimum Beginning balance, Weighted Average Grant Date Fair Value Ending balance, Weighted Average Grant Date Fair Value Share-Based Compensation Arrangement By Share-Based Payment Award, Options, Outstanding, Weighted Average Fair Value Share based Compensation Arrangement By Share Based Payment Award Options Outstanding Weighted Average Fair Value Shares available for future issuance (in shares) Share-Based Compensation Arrangement by Share-Based Payment Award, Number of Shares Available for Grant Segment Reporting [Table] Segment Reporting [Table] Schedule of Equity Method Investments [Table] Equity Method Investment [Table] Weighted Average Remaining Term (yrs) Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Additional Disclosures [Abstract] Commitments and Contingencies Disclosure [Abstract] Commitments and Contingencies Disclosure [Abstract] All Trading Arrangements All Trading Arrangements [Member] Other Performance Measure, Amount Other Performance Measure, Amount Award Timing MNPI Considered Award Timing MNPI Considered [Flag] Total operating profit Operating Income (Loss) Cash paid during the period for: Interest Paid, Including Capitalized Interest, Operating and Investing Activities [Abstract] Current Fiscal Year End Date Current Fiscal Year End Date Non-PEO NEO Average Total Compensation Amount Non-PEO NEO Average Total Compensation Amount Real estate investments at cost: Real Estate Investment Property, at Cost [Abstract] Change in Fair Value as of Vesting Date of Prior Year Equity Awards Vested in Covered Year Change in Fair Value as of Vesting Date of Prior Year Equity Awards Vested in Covered Year [Member] Entity File Number Entity File Number Schedule of Investments in Multifamily Joint Ventures Investments in Multifamily Joint Ventures [Table Text Block] Investments in Multifamily Joint Ventures Rule 10b5-1 Arrangement Adopted Rule 10b5-1 Arrangement Adopted [Flag] Shares granted to Directors Shares Issued, Value, Share-Based Payment Arrangement, after Forfeiture Guarantee Obligations Guarantee Obligations [Member] Distributions to partners Noncontrolling Interest, Decrease from Distributions to Noncontrolling Interest Holders Schedule of Changes in Outstanding Options Share-Based Payment Arrangement, Option, Activity [Table Text Block] Exercisable, Weighted Average Remaining Term (years) Share-Based Compensation Arrangement By Share-Based Payment Award, Options, Exercisable Remaining Term Share-Based Compensation Arrangement By Share-Based Payment Award, Options, Exercisable Remaining Term Weighted Average Exercise Price Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Outstanding, Weighted Average Exercise Price [Abstract] Recovery of Erroneously Awarded Compensation Disclosure [Line Items] Profits interest Profits Interest Profits Interest Common stock, shares issued (in shares) Common Stock, Shares, Issued Measure: Measure [Axis] Investments in Joint Ventures Equity Method Investments and Joint Ventures Disclosure [Text Block] Description of Business and Basis of Presentation Business Description and Basis of Presentation [Text Block] loan outstanding Loans Payable Equity Components [Axis] Equity Components [Axis] Accounts receivable Increase (Decrease) in Accounts Receivable Deferred costs Deferred Costs, Noncurrent Entity Interactive Data Current Entity Interactive Data Current Cash and restricted cash Cash And Restricted Cash Cash And Restricted Cash Deferred compensation Deferred Compensation Liability, Current and Noncurrent Deferred income taxes Deferred Income Tax Liabilities, Net Compensation Actually Paid vs. Other Measure Compensation Actually Paid vs. Other Measure [Text Block] Unamortized debt issuance costs - undrawn loans included in Deferred costs in the Company's consolidated balance sheets Debt Issuance Costs, Line of Credit Arrangements, Net Entity Small Business Entity Small Business Comprehensive income (loss) attributable to the Company Comprehensive Income (Loss), Net of Tax, Attributable to Parent Termination Date Trading Arrangement Termination Date Estero Partnership Estero Partnership Estero Partnership [Member] Estero Partnership [Member] Lake Louisa Property Lake Louisa Property [Member] Lake Louisa Property Subsequent Events [Abstract] Compensation Actually Paid vs. Total Shareholder Return Compensation Actually Paid vs. Total Shareholder Return [Text Block] MNPI Disclosure Timed for Compensation Value MNPI Disclosure Timed for Compensation Value [Flag] Expiration period (in years) Share-Based Compensation Arrangement by Share-Based Payment Award, Expiration Period Line of Credit Facility, Lender [Domain] Line of Credit Facility, Lender [Domain] Document Type Document Type Fair Value as of Grant Date Award Grant Date Fair Value Brooksville Quarry, LLC Brooksville Quarry, LLC Brooksville Quarry L L C [Member] Brooksville Quarry L L C [Member] Aggregate intrinsic value, exercisable Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Exercisable, Intrinsic Value Pay vs Performance Disclosure, Table Pay vs Performance [Table Text Block] Operating expenses Operating Costs and Expenses Arrangement Duration Trading Arrangement Duration Statement of Stockholders' Equity [Abstract] Statement of Stockholders' Equity [Abstract] Proceeds from long-term debt Proceeds from Issuance of Long-Term Debt Local Phone Number Local Phone Number Maximum dividends to pay Amount Available for Dividend Distribution without Affecting Capital Adequacy Requirements Consolidation Items [Axis] Consolidation Items [Axis] Entity Address, Postal Zip Code Entity Address, Postal Zip Code Entity Registrant Name Entity Registrant Name Net changes in operating assets and liabilities: Increase (Decrease) in Operating Assets [Abstract] Insider Trading Policies and Procedures Not Adopted Insider Trading Policies and Procedures Not Adopted [Text Block] Commitments and contingencies Commitments and Contingencies Total revenues Revenues: Revenues Total investments in properties Property, Plant, and Equipment, before Accumulated Depreciation, Depletion, and Amortization Changed Peer Group, Footnote Changed Peer Group, Footnote [Text Block] Unrealized rents & receivables Unrealized Rents & Receivables Unrealized Rents & Receivables Dock 79 Loan Dock 79 Loan [Member] Dock 79 Loan [Member] Equity in loss of joint ventures Equity in loss of joint ventures The Company's Share of Profit (Loss) of the Partnership Income (Loss) from Equity Method Investments Accounts payable and accrued liabilities Increase (Decrease) in Accounts Payable and Accrued Liabilities Forgone Recovery due to Expense of Enforcement, Amount Forgone Recovery due to Expense of Enforcement, Amount Executive Category: Executive Category [Axis] Bryant Street Partnerships Total JV Bryant Street Partnerships Joint Venture [Member] Bryant Street Partnerships Joint Venture Wells Fargo Wells Fargo [Member] Wells Fargo [Member] Counterparty Name [Axis] Counterparty Name [Axis] Cost of operations: Operating Costs and Expenses [Abstract] Granted, Weighted Average Grant Date Fair Value Share-Based Compensation Arrangement By Share-Based Payment Award, Equity Instruments Other Than Options, Grants In Period, Weighted Average Fair Value Share-Based Compensation Arrangement By Share-Based Payment Award, Equity Instruments Other Than Options, Grants In Period, Weighted Average Fair Value All Award Types Award Type [Domain] Non-PEO NEO Average Compensation Actually Paid Amount Non-PEO NEO Average Compensation Actually Paid Amount Fair Value Measurements Fair Value Disclosures [Text Block] Total Assets of The Partnership Real Estate Total Assets [Member] Real Estate Total Assets [Member] Supplemental disclosure of cash flow information: Supplemental Cash Flow Information [Abstract] Expected life (in years) Share-Based Compensation Arrangement by Share-Based Payment Award, Fair Value Assumptions, Expected Term Market closing price (in dollars per share) Share Price Real estate held for investment, at cost Real Estate Investments, Other Accounts payable and accrued liabilities Accounts Payable and Accrued Liabilities PEO Name PEO Name Geographical [Axis] Geographical [Axis] Restricted cash Restricted Cash Greenville Partnerships Company Share Greenville Woodfield Partnerships [Member] Greenville Woodfield Partnerships [Member] Total Multifamily JV’s Multifamily J V [Member] Multifamily J V [Member] Maren Maren [Member] Maren [Member] Net real estate investments Real Estate Investments, Net Number of mining tenants Number Of Mining Tenants Number Of Mining Tenants Other assets Other Assets Stock Price or TSR Estimation Method Stock Price or TSR Estimation Method [Text Block] Entity Tax Identification Number Entity Tax Identification Number Legal Entity [Axis] Legal Entity [Axis] Fixed rate mortgage loans, 3.03% interest only, matures 4/1/2033 Notes Payable Cash, cash equivalents and restricted cash including $11,570 and $11,394 of restricted cash at June 30, 2026 and December 31, 2025, respectively Cash, cash equivalents and restricted cash at beginning of year Cash, cash equivalents and restricted cash at end of the year Cash, Cash Equivalent, Restricted Cash, and Restricted Cash Equivalent, Continuing Operation Industrial and commercial Industrial and commercial Industrial and Commercial Segment [Member] Industrial Commercial [Member] Entity Incorporation, State or Country Code Entity Incorporation, State or Country Code Aggregate Erroneous Compensation Not Yet Determined Aggregate Erroneous Compensation Not Yet Determined [Text Block] Material Terms of Trading Arrangement Material Terms of Trading Arrangement [Text Block] Non-NEOs Non-NEOs [Member] Vesting Date Fair Value of Equity Awards Granted and Vested in Covered Year Vesting Date Fair Value of Equity Awards Granted and Vested in Covered Year [Member] Comprehensive income (loss) Comprehensive Income (Loss), Net of Tax, Including Portion Attributable to Noncontrolling Interest FRP Ownership (as a percent) FRP Ownership Equity Method Investment, Ownership Percentage Land Land Lending ventures Lending Ventures [Member] Lending Ventures [Member] Schedule of Outstanding Debt, Net of Unamortized Debt Issuance Costs Schedule of Debt [Table Text Block] Investment, Name [Domain] Investment, Name [Domain] Long-Term Debt, Type [Domain] Long-Term Debt, Type [Domain] Net income attributable to the Company- Basic (in dollars per share) Basic (in dollars per share) Earnings Per Share, Basic BC FRP Realty, LLC BC FRP Realty, LLC B C F R P Realty L L C [Member] B C F R P Realty L L C [Member] Deferred revenue Deferred Revenue Statistical Measurement [Axis] Statistical Measurement [Axis] Insider Trading Arrangements [Line Items] Award Type [Axis] Award Type [Axis] Named Executive Officers, Footnote Named Executive Officers, Footnote [Text Block] Development Development Development [Member] Development [Member] Aggregate Change in Present Value of Accumulated Benefit for All Pension Plans Reported in Summary Compensation Table Aggregate Change in Present Value of Accumulated Benefit for All Pension Plans Reported in Summary Compensation Table [Member] Awards Close in Time to MNPI Disclosures Awards Close in Time to MNPI Disclosures [Table] Common Stock Common Stock [Member] Schedule of Income Statements of Greenville Partnerships Equity Method Investment Summarized Financial Information Investment Income Statements Greenville Woodfield [Table Text Block] Equity Method Investment Summarized Financial Information Investment Income Statements Greenville Woodfield Compensation Actually Paid vs. Company Selected Measure Compensation Actually Paid vs. Company Selected Measure [Text Block] Cover [Abstract] Cover [Abstract] Dividend yield Share-Based Compensation Arrangement by Share-Based Payment Award, Fair Value Assumptions, Expected Dividend Rate Grand Total Equity Method Investment, Nonconsolidated Investee or Group of Investees [Member] Forfeited, Weighted Average Grant Date Fair Value Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Forfeited, Weighted Average Grant Date Fair Value Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Forfeited, Weighted Average Grant Date Fair Value Depreciation/depletion/amortization Cost, Depreciation, Amortization and Depletion Equity Awards Adjustments Equity Awards Adjustments [Member] Tenant security deposits Security Deposit Liability Total liabilities and equity Liabilities and Equity Stock option grants Share-Based Payment Arrangement, Option [Member] Capital – FRP Equity, Attributable to Noncontrolling Interest Segments [Axis] Segments [Axis] Additional 402(v) Disclosure Additional 402(v) Disclosure [Text Block] Related and Nonrelated Parties [Domain] Related and Nonrelated Parties [Domain] Weighted Average Grant Date Fair Value(000's) Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Nonvested, Weighted Average Grant Date Fair Value [Abstract] Tabular List, Table Tabular List [Table Text Block] Vesting [Axis] Vesting [Axis] Other long-term liabilities Increase (Decrease) in Other Noncurrent Liabilities Schedule of Stock Compensation Expense Share-Based Payment Arrangement, Cost by Plan [Table Text Block] Long-Term Debt Long-Term Debt [Text Block] Total Share holders’ Equity Parent [Member] Operating profit (loss): Operating Profit Before General And Administrative Expenses Operating Profit Before General And Administrative Expenses Name Awards Close in Time to MNPI Disclosures, Individual Name Performance-based awards Performance Based Restricted Awards [Member] Performance Based Restricted Awards [Member] Equity: Equity, Including Portion Attributable to Noncontrolling Interest [Abstract] Vested (in shares) Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Vested, Number of Shares Year-end Fair Value of Equity Awards Granted in Covered Year that are Outstanding and Unvested Year-end Fair Value of Equity Awards Granted in Covered Year that are Outstanding and Unvested [Member] Other liabilities Equity Method Investment Summarized Financial Information Other Liabilities Equity Method Investment Summarized Financial Information Other Liabilities Aggregate intrinsic value, outstanding Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Outstanding, Intrinsic Value Forfeited (in shares) Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Forfeited in Period Annual director stock award Director Stock Award [Member] Director Stock Award General and administrative Total general and administrative expenses General and Administrative Expense Adjustment to Compensation: Adjustment to Compensation [Axis] Bryant Street Partnerships Bryant Street Partnerships Bryant Street Partnerships Company Share Bryant Street Partnerships [Member] Bryant Street Partnerships [Member] Rule 10b5-1 Arrangement Terminated Rule 10b5-1 Arrangement Terminated [Flag] Aggregate Erroneous Compensation Amount Aggregate Erroneous Compensation Amount Interest Interest Paid, Excluding Capitalized Interest, Operating Activity Statement of Cash Flows [Abstract] Statement of Cash Flows [Abstract] Other comprehensive income (loss) net of tax: Accumulated Other Comprehensive Income (Loss), Net of Tax [Abstract] Credit Facility [Axis] Credit Facility [Axis] Aggregate Available Trading Arrangement, Securities Aggregate Available Amount Name Measure Name Pay vs Performance Disclosure [Line Items] Debt Instrument [Line Items] Debt Instrument [Line Items] Synovus National Bank Synovus National Bank [Member] Synovus National Bank Pay vs Performance Disclosure Pay vs Performance Disclosure [Table] Capital in Excess of Par Value Additional Paid-in Capital [Member] Income (loss) before income taxes Income (Loss) from Continuing Operations before Income Taxes, Domestic Entity Filer Category Entity Filer Category Guarantor Obligations, Nature [Domain] Guarantor Obligations, Nature [Domain] Name Trading Arrangement, Individual Name Pinnacle Bank Pinnacle Bank [Member] Pinnacle Bank Shares granted to Directors (in shares) Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Grants in Period, Net of Forfeitures Company Selected Measure Amount Company Selected Measure Amount Federal and state income taxes receivable Income Taxes Receivable Equity Method Investments and Joint Ventures [Abstract] Equity Method Investments and Joint Ventures [Abstract] Depreciation, depletion and amortization Depreciation, depletion and amortization: Depreciation, Depletion and Amortization Entity Address, Address Line Two Entity Address, Address Line Two Number of plans Number Of Plans Number Of Plans Net income (loss) Net income (loss) Net income (loss) Profit (Loss) Of the Partnership Net Income (Loss), Including Portion Attributable to Noncontrolling Interest Non-PEO NEO Non-PEO NEO [Member] Entity Address, Address Line One Entity Address, Address Line One Debt outstanding on revolver Line of Credit Facility, Fair Value of Amount Outstanding Provision for income taxes Income Tax Expense (Benefit) Risks and Uncertainties [Abstract] Risks and Uncertainties [Abstract] Award Timing Method Award Timing Method [Text Block] Net increase (decrease) in cash, cash equivalents, and restricted cash 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] Mining Top Customer Mining Top Customer [Member] Mining Top Customer [Member] Minimum expected volatility (as percent) Share-Based Compensation Arrangement by Share-Based Payment Award, Fair Value Assumptions, Expected Volatility Rate, Minimum Recently Issued Accounting Standards Accounting Standards Update and Change in Accounting Principle [Text Block] Net income (loss) attributable to the Company Net income (loss) attributable to the Company Net Income (Loss) Attributable to Parent Long-Term Debt, Type [Axis] Long-Term Debt, Type [Axis] Erroneous Compensation Analysis Erroneous Compensation Analysis [Text Block] Corporate Joint Venture Corporate Joint Venture [Member] Unamortized debt issuance costs Unamortized Debt Issuance Expense Statement [Table] Statement [Table] Proceeds from the sale of equipment and property Proceeds from Sale of Property, Plant, and Equipment Share-Based Payment Arrangement, Tranche Two Share-Based Payment Arrangement, Tranche Two [Member] Cash items Segment Reporting, Reconciling Item, Excluding Corporate Nonsegment [Member] Restatement Determination Date: Restatement Determination Date [Axis] Restricted stock award Stock Issued During Period, Value, Restricted Stock Award, Gross Exercisable (in dollars per share) Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Exercisable, Weighted Average Exercise Price Revenues: Revenues [Abstract] Granted (in dollars per share) Share Based Compensation Arrangement By Share Based Payment Award Equity Instruments Other Than Options Grants In Period Weighted Average Exercise Price Share Based Compensation Arrangement By Share Based Payment Award Equity Instruments Other Than Options Grants In Period Weighted Average Exercise Price Pension Benefits Adjustments, Footnote Pension Benefits Adjustments, Footnote [Text Block]