Acres of land related to land liens Acres of Land Related to Land Liens Acres of land related to land liens. Accumulated Depreciation Finite-Lived Intangible Assets, Accumulated Amortization Accrued expenses Deferred Tax Assets, Tax Deferred Expense, Reserves and Accruals, Accrued Liabilities Schedule of Available-for-sale Securities Debt Securities, Available-for-Sale [Table Text Block] Expected return on plan assets Defined Benefit Plan, Expected Return (Loss) on Plan Assets Schedule of Expected Annual Benefit Payments Schedule of Expected Benefit Payments [Table Text Block] Award Timing Predetermined Award Timing Predetermined [Flag] Entity File Number Entity File Number Water Water [Member] Additional Paid-In Capital Additional Paid-in Capital [Member] Tabular List, Table Tabular List [Table Text Block] Benefit (provision) for income taxes related to other comprehensive (loss) income items Other Comprehensive Income (Loss), Tax December 16, 2023 December 16, 2023 [Member] December 16, 2023 New Accounting Pronouncements Adopted and New Accounting Pronouncements New Accounting Pronouncements, Policy [Policy Text Block] Non-cash tenant allowance amortization Equity Method Investment, Summarized Financial Information, Tenant Allowance Amortization Equity Method Investment, Summarized Financial Information, Tenant Allowance Amortization Other expenses Other Expenses Measurement Basis [Axis] Measurement Basis [Axis] Adjustment to Compensation: Adjustment to Compensation [Axis] RELATED PARTY TRANSACTIONS Related Party Transactions Disclosure [Text Block] Named Executive Officers, Footnote Named Executive Officers, Footnote [Text Block] Stock grant expense Deferred Tax Assets, Tax Deferred Expense, Compensation and Benefits, Share-Based Compensation Cost Consumer price per acre (per acre-foot) Cost of Purchased Water, Area Cost of Purchased Water, Area Pistachios Pistachios [Member] Pistachios [Member] Other Liabilities [Abstract] Other Liabilities [Abstract] Adjustment to Compensation, Amount Adjustment to Compensation Amount Percentage of revenue Concentration Risk, Percentage Benefit plan adjustments Pension Plan Pension Plan [Member] Principles of Consolidation Consolidation, Policy [Policy Text Block] Stock compensation expense Share-Based Payment Arrangement, Noncash Expense Federal Federal Income Tax Expense (Benefit), Continuing Operations Employee Stock Option Share-Based Payment Arrangement, Option [Member] Property, Plant and Equipment [Table] Property, Plant and Equipment [Table] Cash Equivalents Cash and Cash Equivalents, Policy [Policy Text Block] Tax Rate Effective Income Tax Rate Reconciliation, Percent [Abstract] Antidilutive Securities [Axis] Antidilutive Securities [Axis] Total Tejon Ranch Co. stockholders’ equity Equity, Attributable to Parent Debt Securities, Available-for-sale [Table] Debt Securities, Available-for-Sale [Table] Other comprehensive (loss) income: Other Comprehensive Income (Loss), Net of Tax [Abstract] Insider Trading Policies and Procedures [Line Items] Schedule of Property and Equipment and their Respective Useful Lives Property, Plant and Equipment [Table Text Block] Common stock, authorized shares (in shares) Common Stock, Shares Authorized Revenues Segment Reporting Information, Revenue for Reportable Segment [Abstract] Excess tax benefit of stock-based compensation Excess Tax (Expense) Benefit From Stock-Based Compensation Excess Tax (Expense) Benefit From Stock-Based Compensation Percentage of target amount depending upon performance achieved over performance period Share-Based Compensation Arrangement, Percentage of Target Amount Depending Upon Performance Achieved Over Performance Period Share-Based Compensation Arrangement, Percentage of Target Amount Depending Upon Performance Achieved Over Performance Period Credit Risk Concentration Risk, Credit Risk, Policy [Policy Text Block] Interest rate swap Deferred Tax Liabilities, Derivatives LIABILITIES AND EQUITY Liabilities and Equity [Abstract] Cover [Abstract] Portion at Fair Value Measurement Portion at Fair Value Measurement [Member] Maximum Maximum [Member] Net loss attributable to non-controlling interest Net Income (Loss) Attributable to Noncontrolling Interest Total water held for future use Long-term Water Assets, Banked Water and Water Contract Rights (Volume) Long-term Water Assets, Banked Water and Water Contract Rights (Volume) Net cost of purchased water contracts Finite-Lived Intangible Assets, Net Restricted Stock Restricted Stock [Member] Non-PEO NEO Average Total Compensation Amount Non-PEO NEO Average Total Compensation Amount Schedule of Share-based Compensation Arrangements by Share-based Payment Award [Table] Schedule of Share-Based Compensation Arrangements by Share-Based Payment Award [Table] (Gain) loss on sale of real estate/assets Gain (Loss) on Disposition of Property Plant Equipment, Excluding Oil and Gas Property and Timber Property Adjustment to Non-PEO NEO Compensation Footnote Adjustment to Non-PEO NEO Compensation Footnote [Text Block] Retirement Benefits [Abstract] Retirement Benefits [Abstract] Forgone Recovery due to Disqualification of Tax Benefits, Amount Forgone Recovery due to Disqualification of Tax Benefits, Amount Non-Rule 10b5-1 Arrangement Terminated Non-Rule 10b5-1 Arrangement Terminated [Flag] Income before income taxes Income (Loss) from Continuing Operations before Income Taxes, Noncontrolling Interest Entity Shell Company Entity Shell Company Statement of Stockholders' Equity [Abstract] Statement of Stockholders' Equity [Abstract] Capitalized Share-Based Payment Arrangement, Amount Capitalized Operating Segments Operating Segments [Member] Comprehensive loss attributable to non-controlling interests Comprehensive Income (Loss), Net of Tax, Attributable to Noncontrolling Interest Award Timing MNPI Considered Award Timing MNPI Considered [Flag] Line of Credit Facility [Table] Line of Credit Facility [Table] Long-term water assets (Volume) Long-term water assets (Volume) (in acre-feet) Long-term Water Assets (Volume) Long-term Water Assets (Volume) Document Fiscal Period Focus Document Fiscal Period Focus Rate of increase in periodic pension costs Defined Benefit Plan, Assumptions Used Calculating Net Periodic Benefit Cost, Rate of Compensation Increase Award Timing Method Award Timing Method [Text Block] Litigation Case [Domain] Litigation Case [Domain] Award Type [Axis] Award Type [Axis] Long-term deferred gains Contract with Customer, Liability, Noncurrent TRC-MRC 2, LLC TRC-MRC 2 LLC [Member] TRC-MRC 2 LLC [Member] Investment, Name [Domain] Investment, Name [Domain] Common Stock Options and Grants Share-Based Payment Arrangement [Policy Text Block] Trading Symbol Trading Symbol Wheeler Ridge Maricopa Water Storage District Wheeler Ridge Maricopa Water Storage District [Member] Wheeler Ridge Maricopa Water Storage District [Member] Permanent differences Effective Income Tax Rate Reconciliation, Change in Deferred Tax Assets Valuation Allowance, Percent Maximum performance (in shares) Performance Awards Granted with Performance Conditions, Maximum Number of Shares to be Issued, at Maximum Performance Performance Awards Granted with Performance Conditions, Maximum Number of Shares to be Issued, at Maximum Performance Average service period Defined Benefit Plan, Average Service Period Defined Benefit Plan, Average Service Period Entity Address, City or Town Entity Address, City or Town Tejon Ranch Commerce Center - Residential Tejon Ranch Commerce Center - Multifamily [Member] Tejon Ranch Commerce Center - Multifamily Non-PEO NEO Average Compensation Actually Paid Amount Non-PEO NEO Average Compensation Actually Paid Amount AVEK Antelope Valley East Kern Water Agency [Member] Antelope valley east kern water agency. Compensation Actually Paid vs. Other Measure Compensation Actually Paid vs. Other Measure [Text Block] Target performance (in shares) Performance Awards Granted with Performance Conditions, Number of Shares to be Issued, at Target Performance Performance Awards Granted with Performance Conditions, Number of Shares to be Issued, at Target Performance Percentage rent Operating Lease, Lease Income, Percentage Rent Operating Lease, Lease Income, Percentage Rent Entity Emerging Growth Company Entity Emerging Growth Company Total amount recorded Defined Benefit Plan, Accumulated Other Comprehensive (Income) Loss, before Tax 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] 2026 Defined Benefit Plan, Expected Future Benefit Payment, Year One Deferred gains Deferred Tax Liabilities, Tax Deferred Income Common stock, outstanding shares (in shares) Beginning balance (in shares) Ending balance (in shares) Common Stock, Shares, Outstanding Assumptions used in determining actuarial present value of projected benefits obligation: Defined Benefit Plan, Weighted Average Assumptions Used in Calculating Benefit Obligation [Abstract] Accrued capital and water expenditures included in current liabilities Change In Capital Expenditures Incurred But Not Yet Paid Change In Capital Expenditures Incurred But Not Yet Paid Real estate and improvements - held for lease, gross Inventory, Real Estate, Improvements, Gross Inventory, Real Estate, Improvements, Gross Accrued vacation Accrued Vacation, Current Annual fee increase, percent Long Term Water Assets, Purchased, Annual Fee Increase, Percent Long Term Water Assets, Purchased, Annual Fee Increase, Percent 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] Nature of Operation, Product Information, Concentration of Risk [Table] Nature of Operation, Product Information, Concentration of Risk [Table] Change in benefit obligation - Pension Defined Benefit Plan, Change in Benefit Obligation [Roll Forward] Prepaid expenses and other current assets Prepaid Expense and Other Assets, Current Summary of stock grant activity: Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Nonvested, Number of Shares [Roll Forward] Debt instrument, interest rate, effective percentage Debt Instrument, Interest Rate, Effective Percentage Entity Address, Postal Zip Code Entity Address, Postal Zip Code Restatement Determination Date Restatement Determination Date Components of provision (benefit) for income taxes: Income Tax Expense (Benefit), Continuing Operations, by Jurisdiction [Abstract] Income tax expense Total provision (benefit): Total Income Tax Expense (Benefit) Pension Adjustments Service Cost Pension Adjustments Service Cost [Member] Fair Value Hierarchy and NAV [Axis] Fair Value Hierarchy and NAV [Axis] Property and equipment, gross Property, Plant and Equipment, Gross Grapevine Grapevine [Member] Grapevine [Member] SWP Contracts State Water Project Contracts [Member] State water project contracts. Compensation Actually Paid vs. Company Selected Measure Compensation Actually Paid vs. Company Selected Measure [Text Block] Dudley-Ridge water purchase contract Dudley Ridge Water Rights [Member] Dudley Ridge Water Rights [Member] Income tax paid, federal Income Tax Paid, Federal, after Refund Received Buildings and improvements Building and Building Improvements [Member] All Trading Arrangements All Trading Arrangements [Member] Equity Awards Adjustments, Footnote Equity Awards Adjustments, Footnote [Text Block] Total Shareholder Return Vs Peer Group Total Shareholder Return Vs Peer Group [Text Block] Vineyards and orchards Vineyards and Orchards [Member] Vineyards and Orchards [Member] Other Effective Income Tax Rate Reconciliation, Other Adjustments, Amount Deferred income tax liabilities: Deferred Tax Liabilities, Gross [Abstract] Stock grants outstanding beginning of the year at target achievement (in shares) Stock grants outstanding at target achievement (in shares) Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Nonvested, Number Commitments and Contingencies Disclosure [Abstract] Commitments and Contingencies Disclosure [Abstract] Net cash provided by operating activities Cash Provided by (Used in) Operating Activity, Including Discontinued Operation Estimated Fair Value Debt Securities, Available-for-Sale, Excluding Accrued Interest Equity Method Investments and Joint Ventures [Abstract] Equity Method Investments and Joint Ventures [Abstract] Property and equipment useful life Property, Plant and Equipment, Useful Life Revenues from External Customers and Long-Lived Assets [Line Items] Revenues from External Customers and Long-Lived Assets [Line Items] Total Equity Method Investment, Nonconsolidated Investee or Group of Investees [Member] Schedule of Equity Method Investments [Line Items] Schedule of Equity Method Investments [Line Items] Equity Valuation Assumption Difference, Footnote Equity Valuation Assumption Difference, Footnote [Text Block] Pastoria Energy Facility, LLC Pastoria Energy Facility, LLC [Member] Pastoria Energy Facility, LLC [Member] PEO Total Compensation Amount PEO Total Compensation Amount Money Market Funds Money Market Funds [Member] OTHER LIABILITIES Other Liabilities Disclosure [Text Block] Equity Components [Axis] Equity Components [Axis] Property, Plant and Equipment [Line Items] Property, Plant and Equipment [Line Items] State deferred taxes Deferred Tax Assets, State Taxes Petro Travel Plaza Holdings LLC Petro Travel Holdings Llc Plaza [Member] Petro travel holdings llc plaza. Non-Rule 10b5-1 Arrangement Adopted Non-Rule 10b5-1 Arrangement Adopted [Flag] Business segments Number of Reportable Segments Cost of sales allocations Deferred Tax Liabilities, Cost of Sales Allocations Deferred Tax Liabilities, Cost of Sales Allocations Entity Address, State or Province Entity Address, State or Province Antidilutive Security, Excluded EPS Calculation [Table] Antidilutive Security, Excluded EPS Calculation [Table] 2029 Defined Benefit Plan, Expected Future Benefit Payment, Year Four Non-deductible compensation Income Tax Reconciliation, Nondeductible Expense, Compensation, Amount Income Tax Reconciliation, Nondeductible Expense, Compensation, Amount Total current liabilities Liabilities, Current Area of land sold (in acres) Area of Real Estate Property Sold Area of Real Estate Property Sold Restricted stock issuance (in shares) Stock Issued During Period, Shares, Restricted Stock Award, Gross Individual: Individual [Axis] Document Annual Report Document Annual Report Cash and Cash Equivalents Defined Benefit Plan, Cash and Cash Equivalents [Member] Forgone Recovery, Explanation of Impracticability Forgone Recovery, Explanation of Impracticability [Text Block] Ranch operations Ranch operations Ranch Operations [Member] Ranch Operations [Member] Repayments of long-term debt Repayments of Long-Term Debt Entity Interactive Data Current Entity Interactive Data Current Year three Debt Securities, Available for Sale Securities, Excluding Accrued Interest, Maturities, Year Three, at Par Debt Securities, Available for sale securities maturities, year two, at par. Current liabilities, net Increase (Decrease) in Operating Liabilities Interest rate swap settlement Proceeds from derivative instrument Proceeds from Derivative Instrument, Investing Activities Funded status - asset Defined Benefit Plan, Funded (Unfunded) Status of Plan Deferred revenues Deferred Tax Assets, Deferred Income Revenue Recognition Revenue from Contract with Customer [Policy Text Block] Excess stock compensation expense (benefit) Effective Income Tax Rate Reconciliation, Nondeductible Expense, Share-Based Payment Arrangement, Amount Reconciling items: Segment Reconciliation [Abstract] Area of land Area of Land Property, Plant and Equipment, Type [Axis] Long-Lived Tangible Asset [Axis] Ownership [Domain] Ownership [Domain] Farming revenue adjustments for differences between original estimates and actual revenues received Farming Revenue, Adjustment to Final Settlement Price Farming Revenue, Adjustment to Final Settlement Price Schedule of Future Minimum Rental Income Lessor, Operating Lease, Payment to be Received, Maturity [Table Text Block] 2027 Defined Benefit Plan, Expected Future Benefit Payment, Year Two Other assets Other Assets, Noncurrent Name of Major Customer [Domain] Customer [Domain] Entity Central Index Key Entity Central Index Key PEO Name PEO Name Revenues Revenues 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] Outstanding Aggregate Erroneous Compensation Amount Outstanding Aggregate Erroneous Compensation Amount Land and land improvements Land and Land Improvements [Member] Schedule Of Equity Method Investment Equity Method Investee Name Axis [Axis] Schedule Of Equity Method Investment Equity Method Investee Name Axis [Axis] Schedule Of Equity Method Investment Equity Method Investee Name Axis State State and Local Income Tax Expense (Benefit), Continuing Operations Defined Benefit Plan [Table] Defined Benefit Plan [Table] Deferred income Contract with Customer, Liability, Current Schedule of Reconciliation of Revenues, Segment Profits (Losses) and Net Income (Loss) Reconciliation of Revenue and Operating Profit (Loss) from Segments to Consolidated [Table Text Block] Reconciliation of Revenue and Operating Profit (Loss) from Segments to Consolidated [Table Text Block] DMB Pacific LLC DMB Pacific LLC [Member] DMB Pacific LLC [Member] Exercise Price Award Exercise Price Entity Filer Category Entity Filer Category Benefits paid Defined Benefit Plan, Benefit Obligation, Benefits Paid Income tax at statutory rate Effective Income Tax Rate Reconciliation, at Federal Statutory Income Tax Rate, Percent Schedule of Long Lived Assets Held-for-sale [Table] Long-Lived Asset, Held-for-Sale [Table] Joint venture allocations Deferred Tax Assets, Equity Method Investments Number of directors Number Of Directors Number Of Directors Current investment policy targets: Defined Benefit Plan, Plan Assets, Allocations [Abstract] Costs Finite-Lived Intangible Assets, Gross 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] Profit from land sales Profit Related To Sale Of Long-Term Water Assets Purchased In Prior Periods Profit Related To Sale Of Long-Term Water Assets Purchased In Prior Periods Entity Address, Address Line One Entity Address, Address Line One Summary of income from commercial rents included in real estate revenue: Operating Leases, Income Statement, Lease Revenue [Abstract] Accumulated Other Comprehensive (Loss) Income AOCI Attributable to Parent [Member] Shares withheld for taxes and tax benefit of vested shares (in shares) Share-Based Payment Arrangement, Shares Withheld for Tax Withholding Obligation Oil and mineral depletion Effective Income Tax Rate Reconciliation, Nondeductible Expense, Depletion, Amount Schedule of Real Estate Schedule of Real Estate Properties [Table Text Block] Ownership [Axis] Ownership [Axis] Name of Property [Domain] Name of Property [Domain] Fair Value as of Grant Date Award Grant Date Fair Value TRC-MRC 4, LLC TRC-MRC 4, LLC [Member] TRC-MRC 4, LLC Common stock equivalents-stock options, grants (in shares) Incremental Common Shares Attributable to Dilutive Effect of Share-Based Payment Arrangements New stock grants/additional shares due to achievement in excess of target (in shares) Shares granted (in shares) Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Grants in Period Total expenses Corporate expenses Costs and expenses Costs and Expenses Expired/forfeited grants (in shares) Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Forfeited in Period Compensation cost not yet recognized Share-Based Payment Arrangement, Nonvested Award, Cost Not yet Recognized, Amount Related Party Transaction [Line Items] Related Party Transaction [Line Items] Changed Peer Group, Footnote Changed Peer Group, Footnote [Text Block] Counterparty Name [Domain] Counterparty Name [Domain] Adjustment To PEO Compensation, Footnote Adjustment To PEO Compensation, Footnote [Text Block] Accrued investment receivable Accrued Investment Income Receivable Title Trading Arrangement, Individual Title Peer Group Total Shareholder Return Amount Peer Group Total Shareholder Return Amount 2028 Defined Benefit Plan, Expected Future Benefit Payment, Year Three Number of joint ventures Variable Interest Entity, Number of Entities Consolidated Variable Interest Entity, Number of Entities Consolidated Recognition of net actuarial loss Other Comprehensive Income (Loss), Defined Benefit Plan, Gain (Loss), Reclassification Adjustment from AOCI, before Tax Majestic Realty Co. Majestic Realty Co. [Member] Majestic Realty Co. [Member] Non-PEO NEO Non-PEO NEO [Member] Commercial/industrial revenues and equity in earnings of unconsolidated joint ventures Revenues and Income (Loss) from Equity Method Investments Revenues and Income (Loss) from Equity Method Investments Net operating loss carryforwards, 20 year maximum Deferred Tax Assets, Operating Loss Carryforwards, Subject to Expiration 1998 Plan Stock Incentive Plan 1998 [Member] Stock incentive plan. Marketable securities with unrecognized gains Debt Securities, Available-for-Sale, Accumulated Gross Unrealized Gain, before Tax Award Type [Domain] Award Type [Domain] Non-controlling interest Equity, Attributable to Noncontrolling Interest Equity Awards Adjustments Equity Awards Adjustments [Member] Pension Benefits Adjustments, Footnote Pension Benefits Adjustments, Footnote [Text Block] Defined Benefit Plan Disclosure [Line Items] Defined Benefit Plan Disclosure [Line Items] Compensation Amount Outstanding Recovery Compensation Amount Debt Instrument, Name [Domain] Debt Instrument, Name [Domain] REAL ESTATE Real Estate Disclosure [Text Block] Certificates of deposit Certificates of Deposit [Member] Recovery of Erroneously Awarded Compensation Disclosure [Line Items] Estimated Fair Value Estimate of Fair Value Measurement [Member] Number of tenants Joint Venture, Number Of Tenants Joint Venture, Number Of Tenants Retirement Plan Type [Domain] Retirement Plan Type [Domain] MNPI Disclosure Timed for Compensation Value MNPI Disclosure Timed for Compensation Value [Flag] Pension adjustment Deferred Tax Assets, Tax Deferred Expense, Compensation and Benefits, Pensions Bakersfield, California Bakersfield, California [Member] Bakersfield, California [Member] Revenues: Revenues [Abstract] Documents Incorporated by Reference Documents Incorporated by Reference [Text Block] Number of acres for development Development of Building Development of building. Accumulated other comprehensive (loss) income Accumulated Other Comprehensive Income (Loss), Net of Tax Financial Instruments [Domain] Financial Instruments [Domain] Total deferred income tax liabilities Deferred Tax Liabilities, Gross Award Date [Domain] Award Date [Domain] Performance Share Grants Performance share grants Performance Shares [Member] Aggregate Pension Adjustments Service Cost Aggregate Pension Adjustments Service Cost [Member] Inventories Total Inventory, Net Finite-Lived Intangible Assets by Major Class [Axis] Finite-Lived Intangible Assets by Major Class [Axis] Minimum Minimum [Member] Company Selected Measure Name Company Selected Measure Name Liabilities for environmental costs Accrual for Environmental Loss Contingencies Fair Value Measurement [Domain] Fair Value Measurement [Domain] Net periodic pension benefit/(cost) Defined Benefit Plan, Expected Net Period Benefit Cost (Credit), Next Fiscal Year Defined Benefit Plan, Expected Net Period Benefit Cost (Credit), Next Fiscal Year LINE OF CREDIT AND LONG-TERM DEBT Debt Disclosure [Text Block] Aggregate Available Trading Arrangement, Securities Aggregate Available Amount Trade accounts payable Accounts Payable, Current Amount paid for water contracts Operating Lease, Payments Stock Appreciation Rights (SARs) Stock Appreciation Rights (SARs) [Member] Other comprehensive (loss) income before taxes Other Comprehensive Income (Loss), before Tax Stockholders' Equity Note [Abstract] Stockholders' Equity Note [Abstract] COMMITMENTS AND CONTINGENCIES Commitments and Contingencies Disclosure [Text Block] Diluted shares outstanding (in shares) Weighted Average Number of Shares Outstanding, Diluted Non-GAAP Measure Description Non-GAAP Measure Description [Text Block] Fee Agreement Agreement Resolving Attorneys' Fees [Member] Agreement Resolving Attorneys' Fees Schedule of Tangible Water Assets Tangible Water Assets [Table Text Block] Tangible Water Assets [Table Text Block] Entity Small Business Entity Small Business Income Tax Disclosure [Abstract] Income Tax Disclosure [Abstract] Operating expenses Operating expenses Other Cost and Expense, Operating Current Current State and Local Tax Expense (Benefit) Document Transition Report Document Transition Report Share-based compensation arrangement by share-based payment award, equity instruments, payout Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments, Payout Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments, Payout Underlying Securities Award Underlying Securities Amount Corporate notes Corporate Note Securities [Member] Machinery, furniture, fixtures and other equipment Other Machinery and Equipment [Member] Equity Component [Domain] Equity Component [Domain] Document Period End Date Document Period End Date RCL Revolving Line of Credit [Member] Revolving Line of Credit INCOME TAXES Income Tax Disclosure [Text Block] Borrowings on line of credit Proceeds from Lines of Credit Contractual obligation for future water payments Contractual Obligation Awards Close in Time to MNPI Disclosures, Table Awards Close in Time to MNPI Disclosures [Table Text Block] Debt Defined Benefit Plan, Debt Security [Member] Real estate - resort/residential Real estate - resort/residential Resort and Residential Real Estate [Member] Resort and Residential Real Estate Five West Parcel Llc Five West Parcel LLC [Member] Five west parcel LLC Total equity Beginning balance, value Ending balance, value Equity (Deficit) Equity, Including Portion Attributable to Noncontrolling Interest Commitments and Contingencies Disclosure [Table] Commitments and Contingencies Disclosure [Table] Commitments and contingencies disclosure. Document Type Document Type Name Outstanding Recovery, Individual Name Product and Service [Axis] Product and Service [Axis] Revenue Revenue from Contract with Customer Benchmark [Member] Total revenues Commercial/industrial revenues Ranch operations revenues Revenue from Contract with Customer, Excluding Assessed Tax Net investment in water assets Net investments in water assets Long Term Assets Held for Future Use or Sale Long term assets held for future use or sale. Litigation Status [Domain] Litigation Status [Domain] Total current assets Assets, Current Equity method investment Investment In Equity Method Investment Summarized Financial Information, Investment Equity Method Investment Summarized Financial Information, Investment Statistical Measurement [Axis] Statistical Measurement [Axis] Total Debt Securities, Available for Sale Securities, Excluding Accrued Interest, Maturities at Par Debt Securities, Available for Sale Securities, Excluding Accrued Interest, Maturities at Par Other Liabilities Disclosure [Abstract] Other Liabilities Disclosure [Abstract] March 13, 2024 March 13, 2024 [Member] March 13, 2024 Less accumulated depreciation Inventory, Real Estate, Improvements, Accumulated Depreciation Inventory, Real Estate, Improvements, Accumulated Depreciation Aggregate Erroneous Compensation Amount Aggregate Erroneous Compensation Amount Total Share-Based Payment Arrangement, Accelerated Cost Peer Group Issuers, Footnote Peer Group Issuers, Footnote [Text Block] Current Liabilities: Liabilities, Current [Abstract] Profit from land sales Proceeds from Sale of Real Estate Reimbursement proceeds from Community Facilities District Payments for (Proceeds from) Other Investing Activities, Business Three Payments for (Proceeds from) Other Investing Activities, Business Three Operating expenses Operating Expenses Level 1 Level 1 Fair Value, Inputs, Level 1 [Member] Revolving line of credit RLC outstanding balance Bond debt sold by TRPFFA Long-Term Line of Credit Water held for future use: Long-term Water Assets, Banked Water and Water Contract Rights [Abstract] Long-term Water Assets, Banked Water and Water Contract Rights [Abstract] Related Party Transaction [Table] Related Party Transaction [Table] Net income per share attributable to common stockholders, diluted (in dollars per share) Earnings Per Share, Diluted 2030 Lessor, Operating Lease, Payment to be Received, Year Five Accounts receivable Accounts Receivable, after Allowance for Credit Loss, Current December 11, 2024 December 11, 2024 [Member] December 11, 2024 Income tax paid, state Income Tax Paid, State and Local, after Refund Received Consolidation Items [Domain] Consolidation Items [Domain] Investments, Debt and Equity Securities [Abstract] Investments, Debt and Equity Securities [Abstract] Auditor Location Auditor Location INVESTMENT IN UNCONSOLIDATED AND CONSOLIDATED JOINT VENTURES Equity Method Investments and Joint Ventures Disclosure [Text Block] Segment operating results Earnings (Loss) Gross Profit Contract renewal optional term Long Term Water Assets, Contract Renewal Optional Term Long Term Water Assets, Contract Renewal Optional Term Marketable securities - available-for-sale Debt Securities, Available-for-Sale, Current Patronage rate Debt Instrument, Patronage Rate Debt Instrument, Patronage Rate Actuarial (gain)/loss assumption changes Defined Benefit Plan, Benefit Obligation, Actuarial Gain (Loss) Provision for additional capitalized costs Deferred Tax Assets, Deferred Expense, Provision for Additional Capitalized Costs Deferred Tax Assets, Deferred Expense, Provision for Additional Capitalized Costs ACCRUED LIABILITIES AND OTHER CURRENT LIABILITIES Accounts Payable and Accrued Liabilities Disclosure [Text Block] Entity Well-known Seasoned Issuer Entity Well-known Seasoned Issuer LONG-TERM WATER ASSETS Property, Plant and Equipment Disclosure [Text Block] Securities, available-for-sale, increase in market value OCI, Debt Securities, Available-for-Sale, Unrealized Holding Gain (Loss), before Adjustment, after Tax Number of community facility districts Number of Community Facility Districts Number of Community Facility Districts Total changes Other Comprehensive (Income) Loss, Defined Benefit Plan, after Reclassification Adjustment, before Tax Expiration Date Trading Arrangement Expiration Date Inventories consist of: Inventory, Net, Items Net of Reserve Alternative [Abstract] Water contracts and related costs, consulting services Related Party Transaction, Amounts of Transaction Product Information [Line Items] Product Information [Line Items] Equity: Equity, Including Portion Attributable to Noncontrolling Interest [Abstract] Property and equipment, net Property and equipment, net Property, Plant and Equipment, Net Long Lived Assets Held For Sale [Line Items] Long-Lived Assets Held-for-Sale [Line Items] Compensation Actually Paid vs. Net Income Compensation Actually Paid vs. Net Income [Text Block] Operating results from commercial/industrial and unconsolidated joint ventures Operating loss from multifamily Operating Income (Loss), Including Equity In Earnings Of Unconsolidated Joint Ventures Operating Income (Loss), Including Equity In Earnings Of Unconsolidated Joint Ventures Farm Inventories Inventory, Policy [Policy Text Block] Entity Current Reporting Status Entity Current Reporting Status Awards Close in Time to MNPI Disclosures Awards Close in Time to MNPI Disclosures [Table] Segment Reporting, Revenue from External Customer, Product and Service [Table] Segment Reporting, Revenue from External Customer, Product and Service [Table] Income tax at statutory rate Effective Income Tax Rate Reconciliation at Federal Statutory Income Tax Rate, Amount Financial Instrument [Axis] Financial Instrument [Axis] Deferred income tax assets: Deferred Tax Assets, Gross [Abstract] Statement of Financial Position [Abstract] Statement of Financial Position [Abstract] Executive Category: Executive Category [Axis] TRPFFA TRPFFA [Member] TRPFFA Excess stock compensation expense (benefit) Effective Income Tax Rate Reconciliation, Nondeductible Expense, Share-Based Payment Arrangement, Percent State income taxes, net of federal benefit Effective Income Tax Rate Reconciliation, State and Local Income Taxes, Percent Current Fiscal Year End Date Current Fiscal Year End Date Marketable securities with unrecognized losses for less than 12 months Debt Securities, Available-for-Sale, Continuous Unrealized Loss Position, Less than 12 Months, Accumulated Loss Finite-Lived Intangible Assets, Major Class Name [Domain] Finite-Lived Intangible Assets, Major Class Name [Domain] Professional services Professional Fees Equity Awards Adjustments, Excluding Value Reported in Compensation Table Equity Awards Adjustments, Excluding Value Reported in the Compensation Table [Member] Distribution of earnings from unconsolidated joint ventures Proceeds from Equity Method Investment, Distribution Maturities and sales of marketable securities Proceeds from Sale and Maturity of Marketable Securities Nickel water purchase contract Nickel Water Rights [Member] Nickel Water Rights [Member] Restricted stock excluded from the calculation of dilutive net income per share (in shares) Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount Weighted Average Number of Shares Outstanding, Diluted [Abstract] Weighted Average Number of Shares Outstanding, Diluted [Abstract] Vineyards and Orchards Agriculture, Policy [Policy Text Block] Net cash provided by (used in) financing activities Cash Provided by (Used in) Financing Activity, Including Discontinued Operation Borrowings Borrowings Equity Method Investment Summarized Financial Information, Borrowings Equity Method Investment Summarized Financial Information, Borrowings Measure: Measure [Axis] Schedule of Other Changes in Plan Assets and Benefit Obligations Recognized in Other Comprehensive Income Schedule of Defined Benefit Plan Amounts Recognized in Other Comprehensive Income (Loss) [Table Text Block] Property, Plant and Equipment, Type [Domain] Long-Lived Tangible Asset [Domain] Restricted stock issuance Stock Issued During Period, Value, Restricted Stock Award, Net of Forfeitures Pay vs Performance Disclosure, Table Pay vs Performance [Table Text Block] Other changes in plan assets and benefit obligations recognized in other comprehensive income: Defined Benefit Plan, Amounts Recognized in Other Comprehensive Income (Loss) [Abstract] Abandonment expense Impairment, Oil and Gas, Property with Unproved Reserve Forgone Recovery due to Violation of Home Country Law, Amount Forgone Recovery due to Violation of Home Country Law, Amount Risk-free interest rate Share-Based Compensation Arrangement by Share-Based Payment Award, Fair Value Assumptions, Risk Free Interest Rate Entity Tax Identification Number Entity Tax Identification Number Information pretaining to assets of the business segments Segment Reporting Information, Additional Information [Abstract] Schedule of Weighted Average Number of Shares Outstanding Schedule of Weighted Average Number of Shares [Table Text Block] Common stock, issued shares (in shares) Common Stock, Shares, Issued Consulting Services Consulting Services [Member] Consulting Services Entity Public Float Entity Public Float Trading Arrangement: Trading Arrangement [Axis] Total Shareholder Return Amount Total Shareholder Return Amount Base rent Operating Lease, Lease Income Net actuarial loss Defined Benefit Plan, Accumulated Other Comprehensive Income (Loss), Gain (Loss), before Tax Corporate expenses Segment Reporting, Reconciling Item, Corporate Nonsegment [Member] Security Exchange Name Security Exchange Name 2027 Lessor, Operating Lease, Payment to be Received, Year Two Schedule of Income from Commercial Rents Included in Real Estate Revenue Schedule of Rent Income [Table Text Block] Schedule of Rent Income [Table Text Block] Cash and Cash Equivalents, Period Increase (Decrease) [Abstract] Cash, Cash Equivalent, Restricted Cash, and Restricted Cash Equivalent, Period Increase (Decrease), Including Exchange Rate Effect and Discontinued Operation [Abstract] Line of credit facility Line of Credit Facility, Maximum Borrowing Capacity Defined Benefit Plan, Plan Assets, Category [Domain] Defined Benefit Plan, Plan Assets, Category [Domain] Statement [Line Items] Statement [Line Items] Debt pay off Extinguishment of Debt, Amount Rule 10b5-1 Arrangement Adopted Rule 10b5-1 Arrangement Adopted [Flag] Cash and cash equivalents Cash and cash equivalents Cash and Cash Equivalent Common Stock Common Stock [Member] Vested grants (in shares) Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Vested in Period (Decrease) increase 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 Number of joint venture contracts Number of Joint Venture Contracts Number of joint venture contracts. SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES Significant Accounting Policies [Text Block] Statistical Measurement [Domain] Statistical Measurement [Domain] Cost Debt Securities, Available-for-Sale, Amortized Cost, Excluding Accrued Interest, before Allowance for Credit Loss Settled Litigation Settled Litigation [Member] Related Party Transaction [Axis] Related Party Transaction [Axis] Segment Operating Results Segment Reporting Information, Income (Loss) before Income Taxes [Abstract] Tax Jurisdiction of Domicile [Extensible Enumeration] Tax Jurisdiction of Domicile [Extensible Enumeration] Interest Rate Swap Interest Rate Swap [Member] Deferred financing costs Payments of Financing Costs Long-Lived Assets Impairment or Disposal of Long-Lived Assets, Policy [Policy Text Block] Equity in earnings of unconsolidated joint ventures, net Equity in earnings of unconsolidated joint ventures, net Equity in earnings of unconsolidated joint ventures Income (Loss) from Equity Method Investments Long Lived Assets Held-for-sale by Asset Type [Axis] Long-Lived Asset, Held-for-Sale, Type [Axis] Leases [Abstract] Leases [Abstract] 2029 Lessor, Operating Lease, Payment to be Received, Year Four Shares withheld for taxes and tax benefit of vested shares Share-Based Payment Arrangement, Decrease for Tax Withholding Obligation Marketable securities with unrecognized losses Gross unrealized holding losses Debt Securities, Available-for-Sale, Accumulated Gross Unrealized Loss, before Tax Trading Arrangements, by Individual Trading Arrangements, by Individual [Table] Net income per share attributable to common stockholders, basic (in dollars per share) Earnings Per Share, Basic Tejon Ranch Commerce Center - Commercial Tejon Ranch Commerce Center - Commercial [Member] Tejon Ranch Commerce Center - Commercial Award Date [Axis] Award Date [Axis] TRCC/Rock Outlet Center, LLC TRCC/Rock Outlet Center [Member] TRCC/Rock Outlet Center [Member] Total deferred income tax assets Deferred Tax Assets, Gross Weighted-average discount rate Defined Benefit Plan, Assumptions Used Calculating Benefit Obligation, Discount Rate Other comprehensive (loss) income Other comprehensive income (loss) Other Comprehensive Income (Loss), Net of Tax Schedule of Segment Information Schedule of Segment Reporting Information, by Segment [Table Text Block] Inventory Disclosure [Abstract] Inventory Disclosure [Abstract] Supplemental executive retirement plan liability (See Note 14) Liability, Pension and Other Postretirement and Postemployment Benefits, Noncurrent TRC-MRC 3, LLC TRC-MRC 3 LLC [Member] TRC-MRC 3 LLC [Member] Award Timing MNPI Disclosure Award Timing MNPI Disclosure [Text Block] Proceeds from water sales Proceeds from Sale of Other Investments Fixed water obligations Water Holding Costs Water Holding Costs Total fair value of award Expensed Share-Based Payment Arrangement, Expense Goodwill and Intangible Assets Disclosure [Abstract] Goodwill and Intangible Assets Disclosure [Abstract] Real estate development expenditures Payments to Develop Real Estate Assets AVEK water for future delivery (in acre-feet) Long-term Water Assets, Water Contract Rights for Future Delivery (Volume) Long-term Water Assets, Water Contract Rights for Future Delivery (Volume) Current Assets: Assets, Current [Abstract] TOTAL LIABILITIES AND EQUITY Liabilities and Equity Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items] Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items] Joint venture allocations Deferred Tax Liabilities, Investment in Noncontrolled Affiliates Transferable water Transferable Water [Member] Transferable water. Concentration Risk Benchmark [Axis] Concentration Risk Benchmark [Axis] Real estate and improvements - held for lease, net Real estate and improvements - held for lease, net Inventory, Real Estate, Improvements STOCK COMPENSATION - RESTRICTED STOCK AND PERFORMANCE SHARE GRANTS Stock Compensation Restricted Stock and Performance Share Grants [Text Block] Stock compensation restricted stock and performance share grants. Other Deferred Tax Assets, Other Equity Method Investment [Table] Equity Method Investment [Table] Number of types of stock grant awards Share Based Compensation Arrangement by Share Based Payment Award, Number of Award Types Share Based Compensation Arrangement by Share Based Payment Award, Number of Award Types Accounting Policies [Abstract] Accounting Policies [Abstract] Simulated Monte Carlo share price (in dollars per share) Share based Compensation Arrangement by Share based Payment Award Simulated Price Share based Compensation Arrangement by Share based Payment Award Simulated Price Concentration Risk Type [Domain] Concentration Risk Type [Domain] Investments in long-term water assets Payments to Acquire Other Investments Excess distributions resulting in deficit balance Distributions in Excess of Investment in Unconsolidated Joint Venture Distributions in Excess of Investment in Unconsolidated Joint Venture Time-Based Cash-Settled Awards Time-Based Cash-Settled Awards [Member] Time-Based Cash-Settled Awards Pay vs Performance Disclosure [Line Items] Additional reimbursement funds Additional Reimbursement Funds Additional reimbursement funds. East CFD East Community Facilities Districts [Member] -- None. No documentation exists for this element. -- Other liabilities Total Other Liabilities, Noncurrent Statement of Cash Flows [Abstract] Statement of Cash Flows [Abstract] Company Selected Measure Amount Company Selected Measure Amount Employer contribution Defined Benefit Plan, Plan Assets, Contributions by Employer Accrued bonus Accrued Bonuses, Current Comprehensive (loss) income attributable to common stockholders Comprehensive Income (Loss), Net of Tax, Attributable to Parent March 06, 2025 March 06, 2025 [Member] March 06, 2025 Name Measure Name Deferred tax liability Deferred Income Tax Liabilities, Net Expected long-term rate of return on plan assets Defined Benefit Plan, Assumptions Used Calculating Net Periodic Benefit Cost, Expected Long-Term Rate of Return on Plan Assets Schedule of Other Liabilities Other Liabilities [Table Text Block] Receivables, inventories, prepaids and other assets, net Increase (Decrease) in Operating Assets Legal Entity [Axis] Legal Entity [Axis] TOTAL ASSETS Identifiable Assets Assets Assets Amount recorded, net of taxes Accumulated Other Comprehensive (Income) Loss, Defined Benefit Plan, after Tax Executive Vice President and Chief Operating Officer Management [Member] Geographical [Domain] Geographical [Domain] Capitalized stock compensation Deferred Tax Liabilities, Capitalized Stock Compensation Deferred Tax Liabilities, Capitalized Stock Compensation Farming inventories Agricultural Related Inventory, Net of Reserves Agricultural Related Inventory, Net of Reserves Components of deferred tax assets and liabilities: Components of Deferred Tax Assets and Liabilities [Abstract] Operating Activities Cash Provided by (Used in) Operating Activity, Including Discontinued Operation [Abstract] Concentration Risk Type [Axis] Concentration Risk Type [Axis] INVENTORIES Inventory Disclosure [Text Block] Equity in Earnings (Loss) Equity Method Investment Summarized Financial Information, Equity In Earnings (Loss) Equity Method Investment Summarized Financial Information, Equity In Earnings (Loss) Variable Interest Entity Consolidation, Variable Interest Entity, Policy [Policy Text Block] Entity Common Stock Shares Outstanding Entity Common Stock, Shares Outstanding Debt Securities, Available-for-sale [Line Items] Debt Securities, Available-for-Sale [Line Items] Level 2 Fair Value, Inputs, Level 2 [Member] Document Financial Statement Error Correction [Flag] Document Financial Statement Error Correction [Flag] State income taxes, net of federal benefit Effective Income Tax Rate Reconciliation, State and Local Income Taxes, Amount Investment in unconsolidated joint ventures Equity Method Investments Insider Trading Policies and Procedures Not Adopted Insider Trading Policies and Procedures Not Adopted [Text Block] Change in Plan Assets Defined Benefit Plan, Change in Fair Value of Plan Assets [Roll Forward] Schedule of Components of Provision (Benefit) for Income Taxes Schedule of Components of Income Tax Expense (Benefit) [Table Text Block] Plan Name [Axis] Plan Name [Axis] Property and Equipment Property, Plant and Equipment, Policy [Policy Text Block] PEO PEO [Member] Schedule of Maturities, at Par, of Marketable Securities by Year Investments Classified by Contractual Maturity Date [Table Text Block] Loss from operations before equity in earnings of unconsolidated joint ventures and income tax expense Income (Loss) from Continuing Operations before Equity Method Investments, Income Taxes, Noncontrolling Interest Changes in operating assets and liabilities: Adjustment to Reconcile Net Income to Cash Provided by (Used in) Operating Activity, Increase (Decrease) in Operating Capital [Abstract] Permanent differences Effective Income Tax Rate Reconciliation, Change in Deferred Tax Assets Valuation Allowance, Amount Depreciation Deferred Tax Liabilities, Property, Plant and Equipment Expected volatility Share-Based Compensation Arrangement by Share-Based Payment Award, Fair Value Assumptions, Expected Volatility Rate Retained Earnings Retained Earnings [Member] Revenues Revenue from Purchased Water Revenue from Purchased Water Schedule of Accrued Liabilities and Other Schedule of Accrued Liabilities [Table Text Block] Share-based Payment Arrangement [Abstract] Share-Based Payment Arrangement [Abstract] Cash, cash equivalents, and restricted cash at beginning of year Cash, cash equivalents, and restricted cash at end of year Total cash, cash equivalents, and restricted cash Cash, Cash Equivalent, Restricted Cash, and Restricted Cash Equivalent, Continuing Operation Income Statement [Abstract] Income Statement [Abstract] Funded status: Defined Benefit Plan, Funded (Unfunded) Status of Plan [Abstract] Purchase of marketable securities Payments to Acquire Marketable Securities Product and Service [Domain] Product and Service [Domain] Customer Concentration Risk Customer Concentration Risk [Member] Company water bank Long-term Water Assets, Banked Water Held at Company Owned Water Bank (Volume) Long-term Water Assets, Banked Water Held at Company Owned Water Bank (Volume) Total Stockholders' Equity Parent [Member] Net income Net income Net income (loss) Net Income (Loss), Including Portion Attributable to Noncontrolling Interest 2028 Lessor, Operating Lease, Payment to be Received, Year Three Restatement does not require Recovery Restatement Does Not Require Recovery [Text Block] Operating Lease, Lease Income, Statement of Income or Comprehensive Income [Extensible Enumeration] Operating Lease, Lease Income, Statement of Income or Comprehensive Income [Extensible Enumeration] City Area Code City Area Code Award Timing, How MNPI Considered Award Timing, How MNPI Considered [Text Block] Los Angeles, California Los Angeles, California [Member] Los Angeles, California [Member] Schedule Of Equity Method Investment Equity Method Investee Name Axis [Domain] Schedule Of Equity Method Investment Equity Method Investee Name Axis [Domain] Schedule Of Equity Method Investment Equity Method Investee Name Axis [Domain] Net deferred taxes Deferred Tax Liabilities, Net General and administrative expenses General and Administrative Expense Investing Activities Cash Provided by (Used in) Investing Activity, Including Discontinued Operation [Abstract] Pay vs Performance Disclosure Pay vs Performance Disclosure [Table] Additional costs for future years Improvement Funds, Reimbursement Of Public Infrastructure Costs Improvement Funds, Reimbursement Of Public Infrastructure Costs Related Party Transactions [Abstract] Related Party Transactions [Abstract] Federal: Federal Income Tax Expense (Benefit), Continuing Operations [Abstract] Net amortization and deferral Net amortization and other Defined Benefit Plan, Amortization of Gain (Loss) Mountain Village Tejon Mountain Village LLC [Member] Tejon mountain village llc. TRCC-East TRCC-East [Member] TRCC-East [Member] Deferred Deferred Federal Income Tax Expense (Benefit) Auditor Name Auditor Name Fair market value of investment securities exceeds cost basis Debt Securities, Available for Sale Securities, Fair Market Value Exceeds Cost Basis, by Amount Debt Securities, Available for sale securities, fair market value exceeds cost basis, by amount. Concentration Risk [Table] Concentration Risk [Table] Audit Information [Abstract] Audit Information Expected annual benefit payments based on actuarial estimates: Defined Benefit Plan, Expected Future Benefit Payment [Abstract] Non-cash investing activities Supplemental Cash Flow Information [Abstract] Dudley-Ridge, Nickel And Tulare Dudley-Ridge, Nickel And Tulare [Member] Dudley-Ridge, Nickel And Tulare Revenue from External Customer [Line Items] Revenue from External Customer [Line Items] June 20, 2025 June 20, 2025 [Member] June 20, 2025 Other Performance Measure, Amount Other Performance Measure, Amount Marketable Securities Marketable Securities, Policy [Policy Text Block] 2026 Lessor, Operating Lease, Payment to be Received, Year One Related Party [Domain] Related and Nonrelated Parties [Domain] Amount Income Tax Expense (Benefit), Effective Income Tax Rate Reconciliation, Amount [Abstract] Federal tax refunds received Proceeds from Income Tax Refunds Litigation Status [Axis] Litigation Status [Axis] Derivative Instrument [Axis] Derivative Instrument [Axis] Benefits/expenses paid Defined Benefit Plan, Plan Assets, Benefits Paid Fair Values of Financial Instruments Fair Value of Financial Instruments, Policy [Policy Text Block] Restricted cash (recorded in other assets) Restricted Cash Additional paid-in capital Additional Paid in Capital, Common Stock Entity [Domain] Entity [Domain] Net cash used in investing activities Cash Provided by (Used in) Investing Activity, Including Discontinued Operation Investments in unconsolidated joint ventures Investments in and Advance to Affiliates, Subsidiaries, Associates, and Joint Ventures 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] Total water held for future use and purchased water contracts Long Term Water Assets, Contracts with Company Long Term Water Assets, Contracts with Company Document Fiscal Year Focus Document Fiscal Year Focus Accrued stock compensation expense Accrued Employee Benefits, Current Tax provision Effective Income Tax Rate Reconciliation, Percent Balance Sheet Information Equity Method Investment, Summarized Financial Information [Abstract] Equity Method Investment, Nonconsolidated Investee [Axis] Equity Method Investment, Nonconsolidated Investee [Axis] Other Other Employee-related Liabilities, Current Plan Name [Domain] Plan Name [Domain] Cost Reported Value Measurement [Member] Weighted-average recognition period of compensation cost Share-Based Payment Arrangement, Nonvested Award, Cost Not yet Recognized, Period for Recognition Real Estate [Abstract] Real Estate [Abstract] Interest Rate Swap Agreements Derivatives, Policy [Policy Text Block] REPORTING SEGMENTS AND RELATED INFORMATION Segment Reporting Disclosure [Text Block] Fair value of plan assets at beginning of year Fair value of plan assets at end of year Fair value of plan assets Defined Benefit Plan, Plan Assets, Amount Current Current Federal Tax Expense (Benefit) Increase (Decrease) in Stockholders' Equity [Roll Forward] Increase (Decrease) in Stockholders' Equity [Roll Forward] Finite-Lived Intangible Assets [Line Items] Finite-Lived Intangible Assets [Line Items] Schedule of Components of Net Periodic Pension Cost Schedule of Net Benefit Costs [Table Text Block] Compensation Actually Paid vs. Total Shareholder Return Compensation Actually Paid vs. Total Shareholder Return [Text Block] Selling, general and administrative expenses Selling, General and Administrative Expense Depreciation and amortization Depreciation and Amortization Depreciation, Depletion and Amortization Schedule of Performance Share Grants with Performance Conditions Schedule of Share-based Payment Award, Performance Share Awards Granted, by Performance Conditions [Table Text Block] Schedule of Share-based Payment Award, Performance Share Awards Granted, by Performance Conditions [Table Text Block] Schedule of Revenues from External Customers and Long-Lived Assets [Table] Schedule of Revenues from External Customers and Long-Lived Assets [Table] Revolving Credit Facility Revolving Credit Facility [Member] TRC-MRC 1, LLC TRC-MRC 1 LLC [Member] TRC-MRC 1 LLC [Member] Arrangement Duration Trading Arrangement Duration Excess joint venture distributions and other (See Note 16) Other Sundry Liabilities, Noncurrent Business Segments [Axis] Segments [Axis] Other Other Inventory, Net of Reserves Interest rate swap Deferred Tax Assets, Derivative Instruments Local Phone Number Local Phone Number Distance from city Property Border, Distance to Major City Property Border, Distance to Major City Additional 402(v) Disclosure Additional 402(v) Disclosure [Text Block] Target share price (in dollars per share) Share Price Cost of sales Cost of sales of water Cost of Purchased Water ASSETS Assets [Abstract] Credit Facility [Axis] Credit Facility [Axis] Unrealized gain on available-for-sale securities OCI, Debt Securities, Available-for-Sale, Gain (Loss), after Adjustment, before Tax Underlying Security Market Price Change Underlying Security Market Price Change, Percent Cost components: Defined Benefit Plan, Net Periodic Benefit Cost (Credit) [Abstract] Debt Instrument [Axis] Debt Instrument [Axis] RETIREMENT PLANS Retirement Benefits [Text Block] Credit Facility [Domain] Credit Facility [Domain] Tejon Ranch Co. stockholders’ equity Equity, Attributable to Parent [Abstract] Benefit plan adjustments Other Comprehensive (Income) Loss, Defined Benefit Plan, before Reclassification Adjustment and Tax Total water held for future use at cost Total cost of water held for future use Tangible Water Assets, Banked Water and Water Contract Rights Tangible Water Assets, Banked Water and Water Contract Rights Investment, Name [Axis] Investment, Name [Axis] Debt instrument, interest rate, stated percentage Debt Instrument, Interest Rate, Stated Percentage Entity Voluntary Filers Entity Voluntary Filers Measurement period from entitlement achievement date Contract Termination, Incentive Fee Calculation, Measurement Period From Entitlement Achievement Date Contract Termination, Incentive Fee Calculation, Measurement Period From Entitlement Achievement Date Real estate - commercial/industrial Real estate - commercial/industrial Commercial and Industrial [Member] Commercial and industrial. Banked water and water for future delivery Banked Water and Water for Future Delivery [Member] Banked water and water for future delivery. Mineral resources Mineral resources Mineral Resources [Member] Mineral Resources [Member] Entity Registrant Name Entity Registrant Name Stock Price or TSR Estimation Method Stock Price or TSR Estimation Method [Text Block] Total net periodic pension (costs)/earnings Defined Benefit Plan, Net Periodic Benefit Cost (Credit) Municipal notes Municipal Bonds [Member] Special taxes paid Taxes, Other Long Lived Assets Held-for-sale, Name [Domain] Long-Lived Assets Held-for-Sale, Name [Domain] Long-Term Water Assets Long-term Water Assets [Policy Text Block] Long-term Water Assets [Policy Text Block] Interest cost Defined Benefit Plan, Expected Interest Cost, Next Fiscal Year Defined Benefit Plan, Expected Interest Cost, Next Fiscal Year Amortization of discount on marketable securities Accretion (Amortization) of Discounts and Premiums, Investments Number of real estate properties delivered Number Of Real Estate Properties Delivered Number Of Real Estate Properties Delivered Related Party [Axis] Related and Nonrelated Parties [Axis] Interest cost Interest cost Defined Benefit Plan, Interest Cost Amounts recorded in stockholders’ equity Defined Benefit Plan, Accumulated Other Comprehensive (Income) Loss, before Tax [Abstract] Schedule of Finite-Lived Intangible Assets Schedule of Finite-Lived Intangible Assets [Table Text Block] Restatement Determination Date: Restatement Determination Date [Axis] Taxes on vested stock grants Proceeds from (Payment for) Other Financing Activity Schedule of Water Revenues and Cost of Sales Schedule of Water Revenues and Cost of Sales [Table Text Block] Schedule of Water Revenues and Cost of Sales [Table Text Block] Name Trading Arrangement, Individual Name Straight line rent Deferred Tax Liabilities, Straight Line Rent Deferred Tax Liabilities, Straight Line Rent Unrealized interest rate swap gain Other Comprehensive Income (Loss), Cash Flow Hedge, Gain (Loss), after Reclassification, before Tax Area of building owned and leased Lease of Building Lease of building. Real estate development (includes $128,549 at December 31, 2025 and $124,136 at December 31, 2024, attributable to Centennial Founders, LLC, Note 16) Real estate development Real estate development Inventory, Real Estate, Land and Land Development Costs Additional bond debt authorized to be sold in future Debt instrument face amount Debt Instrument, Face Amount Recharged water Long-term Water Assets, Recharged Project Water (Volume) Long-term Water Assets, Recharged Project Water (Volume) Statement of Comprehensive Income [Abstract] Statement of Comprehensive Income [Abstract] Collective Funds Equity Funds [Member] Assumptions used in determining periodic pension cost: Defined Benefit Plan, Weighted Average Assumptions Used in Calculating Net Periodic Benefit Cost [Abstract] Name Awards Close in Time to MNPI Disclosures, Individual Name U.S. Treasury and agency notes US Treasury and Government Short-Term Debt Securities [Member] Aggregate Erroneous Compensation Not Yet Determined Aggregate Erroneous Compensation Not Yet Determined [Text Block] Consulting agreement term Related Party Transaction, Term Related Party Transaction, Term Auditor Attestation Flag ICFR Auditor Attestation Flag Amortization of net gain/(loss) Defined Benefit Plan, Expected Amortization of Gain (Loss), Next Fiscal Year Interest cost Defined Benefit Plan, Interest Cost, Including Rounding Difference Defined Benefit Plan, Interest Cost, Including Rounding Difference Stock compensation APIC, Share-Based Payment Arrangement, Increase for Cost Recognition Litigation Case [Axis] Litigation Case [Axis] Auditor Firm ID Auditor Firm ID Segment [Domain] Segment [Domain] Segments [Domain] MARKETABLE SECURITIES Investments in Debt and Marketable Equity Securities (and Certain Trading Assets) Disclosure [Text Block] Benefit obligation at beginning of year Benefit obligation and accumulated benefit obligation at end of year Defined Benefit Plan, Benefit Obligation Fair Value Hierarchy and NAV [Domain] Fair Value Hierarchy and NAV [Domain] TRC-MRC 5, LLC TRC-MRC 5 LLC [Member] TRC-MRC 5 LLC Schedule of Condensed Statements of Operations and Balance Sheet Information of Consolidated and Unconsolidated Joint Ventures Schedule of Condensed Income Statement and Balance Sheet Related to Joint Ventures [Table Text Block] Schedule of condensed income statement and balance sheet related to joint ventures. Less: accumulated depreciation Accumulated Depreciation, Depletion and Amortization, Property, Plant, and Equipment Amounts expected to be recognized as component of net periodic pension costs during the next fiscal year: Defined Benefit Plan, Expected Amortization, Next Fiscal Year [Abstract] Capitalization of costs Deferred Tax Assets, Deferred Expense, Capitalized Costs Deferred Tax Assets, Deferred Expense, Capitalized Costs All Executive Categories All Executive Categories [Member] Schedule of Components of Net Deferred Tax Assets and Liabilities Schedule of Deferred Tax Assets and Liabilities [Table Text Block] Issued and outstanding shares - 26916837 at December 31, 2025 and 26,822,768 at December 31, 2024 Common Stock, Value, Issued Commitments and contingencies Commitments and Contingencies Farming Farming Farming and Agriculture [Member] Farming and agriculture. Performance milestone ratio Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments, Performance Milestone Ratio Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments, Performance Milestone Ratio Contract-based Intangible Assets Contract-Based Intangible Assets [Member] Comprehensive (loss) income Comprehensive Income (Loss), Net of Tax, Including Portion Attributable to Noncontrolling Interest Schedule of Stock Grant Activity Schedule of Nonvested Share Activity [Table Text Block] Non-controlling Interest Noncontrolling Interest [Member] SERP liability adjustments Supplemental Employee Retirement Plan [Member] Investments in Unconsolidated Joint Ventures Equity Method Investments [Policy Text Block] Multifamily Multifamily Segment [Member] Multifamily Segment Ownership percentage Equity Method Investment, Ownership Percentage Acres of land Related Party Transaction, Area of Land Related Party Transaction, Area of Land Thereafter Lessor, Operating Lease, Payment to be Received, after Year Five Concentration Risk [Line Items] Concentration Risk [Line Items] PEO Actually Paid Compensation Amount PEO Actually Paid Compensation Amount Current investment mix Defined Benefit Plan, Plan Assets, Actual Allocation, Percentage Tulare Lake Basin water purchase contract Tulare Lake Basin Water Rights [Member] Tulare Lake Basin Water Rights [Member] Scenario [Axis] Scenario [Axis] Centennial Centennial Founders, LLC Centennial Founders, LLC Centennial Founders LLC [Member] Centennial Founders LLC Commitment and Contingencies Disclosure [Line Items] Commitment and Contingencies Disclosure [Line Items] Commitment and contingencies disclosure. Reconciliation to amounts on consolidated balance sheets: Cash and Cash Equivalent [Abstract] Changes, net of taxes Other Comprehensive (Income) Loss, Defined Benefit Plan, after Reclassification Adjustment, after Tax Derivative Contract [Domain] Derivative Contract [Domain] 2030 Defined Benefit Plan, Expected Future Benefit Payment, Year Five West CFD West Community Facilities Districts [Member] West community facilities districts. Commercial lease agreements, contract terms Lessor, Operating Lease, Term of Contract All Individuals All Individuals [Member] Name Forgone Recovery, Individual Name 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] Property and equipment expenditures Payments to Acquire Other Property, Plant, and Equipment Target share price to achieve award (in dollars per share) Share-based Compensation Arrangement by Share-based Payment Award, Price at Target Achievement Share-based Compensation Arrangement by Share-based Payment Award, Price at Target Achievement Percentage of building leased Percentage Of Building Leased Percentage Of Building Leased Acre-Feet Sold Long Term Water Assets, Water Sold (Volume) Long Term Water Assets, Water Sold (Volume) Equities Defined Benefit Plan, Equity Securities [Member] Summary of maturities, at par, of marketable securities Available For Sale Debt Securities, Fiscal Year Maturity [Abstract] Available For Sale Debt Securities, Fiscal Year Maturity Erroneous Compensation Analysis Erroneous Compensation Analysis [Text Block] Intangible Asset, Finite-Lived [Table] Intangible Asset, Finite-Lived [Table] Profit from water sale Profit from water sales Gain (Loss) on Sale of Other Investments Line of Credit Facility [Line Items] Line of Credit Facility [Line Items] Geographical [Axis] Geographical [Axis] Proceeds from sale of land Proceeds from Sale, Land, Held-for-Use Rule 10b5-1 Arrangement Terminated Rule 10b5-1 Arrangement Terminated [Flag] Tejon-Castac Water District Tejon-Castac Water District [Member] Tejon-Castac Water District [Member] LEASES Lessor, Operating Leases [Text Block] Forecast Forecast [Member] Erroneously Awarded Compensation Recovery Erroneously Awarded Compensation Recovery [Table] Concentration Risk Benchmark [Domain] Concentration Risk Benchmark [Domain] Title of 12(b) Security Title of 12(b) Security Non-cash retirement plan expense Pension and Other Postretirement Benefits Cost (Reversal of Cost) Total other income, net Nonoperating Income (Expense) Consolidated joint venture, ownership interest Subsidiary, Ownership Percentage, Parent Distribution of equity from unconsolidated joint ventures Proceeds from Equity Method Investment, Distribution, Return of Capital Right and share of profit and loss Equity Method Investment, Right and Share of Income and (Loss) Equity Method Investment, Right and Share of Income and (Loss) Borrowings under joint venture Equity Method Investment Summarized Financial Information, Line of Credit Facility, Maximum Borrowing Capacity Equity Method Investment Summarized Financial Information, Line of Credit Facility, Maximum Borrowing Capacity Capital Expenditures Capital Expenditures Capital Expenditures Third Party Third Party [Member] Third Party Net loss (gain) Other Comprehensive Income (Loss), Defined Benefit Plan, Gain (Loss) Arising During Period, before Tax Award Timing Disclosures [Line Items] Market-Based, Cash-Settled Awards Market-Based, Cash-Settled Awards [Member] Market-Based, Cash-Settled Awards Schedule of Components of Inventories Schedule of Inventory, Current [Table Text Block] Profit Gross Profit from Purchased Water Gross Profit from Purchased Water Payments for legal settlements Payments for Legal Settlements EQUITY Equity [Text Block] Deferred Deferred State and Local Income Tax Expense (Benefit) Performance-Based Cash-Settled Awards Performance-Based Cash-Settled Awards [Member] Performance-Based Cash-Settled Awards Net income attributable to common stockholders Net Income (Loss) Attributable to Parent Equity Method Investment, Nonconsolidated Investee [Domain] Equity Method Investment, Nonconsolidated Investee [Domain] Development in process Construction in Progress [Member] Accrued liabilities and other Total Other Accrued Liabilities, Current Schedule of Reconciliation of Income Tax Expense from Statutory Federal Income Tax Rate Schedule of Effective Income Tax Rate Reconciliation [Table Text Block] Other Effective Income Tax Rate Reconciliation, Other Adjustments, Percent Segment Reporting Information [Line Items] Segment Reporting Information [Line Items] State: State and Local Income Tax Expense (Benefit), Continuing Operations [Abstract] Adoption Date Trading Arrangement Adoption Date Prepaid expenses Deferred Tax Liabilities, Prepaid Expenses Major Customers [Axis] Customer [Axis] Operating loss Operating Income (Loss) Real estate expenditures - to be held for lease Payments to Acquire Real Estate Retained earnings Retained Earnings (Accumulated Deficit) Schedule of Changes in Benefit Obligations and Plan Assets Schedule of Net Funded Status [Table Text Block] Name of Property [Axis] Name of Property [Axis] Schedule of Stock Compensation Costs for Employee and NDSI Plans Share-Based Payment Arrangement, Cost by Plan [Table Text Block] 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] Environmental Expenditures Environmental Costs, Policy [Policy Text Block] Property Subject to or Available for Operating Lease [Line Items] Property, Plant, and Equipment, Lessor Asset under Operating Lease [Line Items] 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 Deferred Tax Liabilities, Other Payables and Accruals [Abstract] Payables and Accruals [Abstract] Retirement Plan Type [Axis] Retirement Plan Type [Axis] Other loss, net Other loss Other Nonoperating Income (Expense) Statement [Table] Statement [Table] Actual return (loss) on plan assets Defined Benefit Plan, Plan Assets, Increase (Decrease) for Actual Return (Loss) Year one Debt Securities, Available for Sale Securities, Excluding Accrued Interest, Maturities Year One at Par Debt Securities, Available for Sale Securities, Excluding Accrued Interest, Maturities Year One at Par Deferred income taxes Deferred Income Tax Expense (Benefit) Adjustments to reconcile net income to net cash provided by operating activities: Adjustment to Reconcile Net Income to Cash Provided by (Used in) Operating Activity [Abstract] Financing Activities Cash Provided by (Used in) Financing Activity, Including Discontinued Operation [Abstract] Non-deductible compensation Income Tax Reconciliation, Nondeductible Expense, Compensation, Percent Income Tax Reconciliation, Nondeductible Expense, Compensation, Percent All Adjustments to Compensation All Adjustments to Compensation [Member] Amendment Flag Amendment Flag Schedule of Fair Value of Plan Assets by Investment Type Schedule of Allocation of Plan Assets [Table Text Block] Proceeds from sale of real estate/assets Proceeds from Sale, Real Estate, Held-for-Investment Termination Date Trading Arrangement Termination Date Insider Trading Policies and Procedures Adopted Insider Trading Policies and Procedures Adopted [Flag] Schedule of Components of Water Assets Disclosure of Long-Lived Assets Held-for-Sale [Table Text Block] Expected return on plan assets Defined Benefit Plan, Expected Return on Plan Assets, Next Fiscal Year Defined Benefit Plan, Expected Return on Plan Assets, Next Fiscal Year Common stock (in shares) Weighted Average Number of Shares Outstanding, Basic Inventory write down Inventory Write-down Related Party Transaction [Domain] Related Party Transaction [Domain] Segment Reporting [Abstract] Segment Reporting [Abstract] Cost of sales of land Cost of Revenue TRC-DP1, LLC TRC-DP1, LLC [Member] TRC-DP1, LLC Debt Disclosure [Abstract] Debt Disclosure [Abstract] Other income: Nonoperating Income (Expense) [Abstract] Defined Benefit Plan, Plan Assets, Category [Axis] Defined Benefit Plan, Plan Assets, Category [Axis] Tejon Ranch Commerce Center Tejon Ranch Commerce Center [Member] Tejon Ranch Commerce Center [Member] Scenario [Domain] Scenario [Domain] Costs and expenses: Costs and Expenses [Abstract] Property Subject to or Available for Operating Lease, by Major Property Class [Table] Property, Plant, and Equipment, Lessor Asset under Operating Lease [Table] Schedule of Assumptions Used to Determine The Price of Market-Based Performance Condition Grants Schedule of Share based Payment Award Equity Instruments Other than Options Valuation Assumptions [Table Text Block] Schedule of Share-based Payment Award, Equity Instruments Other than Options, Valuation Assumptions Forgone Recovery due to Expense of Enforcement, Amount Forgone Recovery due to Expense of Enforcement, Amount Accrued paid personal leave Accrued Paid Personal Leave, Current Accrued Paid Personal Leave, Current Share-based Compensation Arrangement by Share-based Payment Award [Line Items] Share-Based Compensation Arrangement by Share-Based Payment Award [Line Items] Common stock, par value per share (in dollars per share) Common Stock, Par or Stated Value Per Share Book deferred gains Deferred Tax Assets, Book Deferred Gains Deferred Tax Assets, Book Deferred Gains Thereafter Defined Benefit Plan, Expected Future Benefit Payment, after Year Five for Next Five Years Use of Estimates Use of Estimates, Policy [Policy Text Block] Water purchase contracts: Long-term Water Assets, Water Contracts (Volume) Long-term Water Assets, Water Contracts (Volume) Rockefeller Joint Ventures Rockefeller Joint Ventures [Member] Rockefeller joint ventures. Future minimum rental income on commercial, communication and right-of-way leases: Operating Leases, Future Minimum Payments Receivable [Abstract] Insider Trading Arrangements [Line Items] NDSI Plan Non-Employee Director Stock Incentive Plan [Member] Non-employee director stock incentive plan. Oil and mineral depletion Effective Income Tax Rate Reconciliation, Nondeductible Expense, Depletion, Percent Total liabilities Liabilities Antidilutive Securities, Name [Domain] Antidilutive Securities, Name [Domain] Investment income Investment Income, Net Transferable water Long-term Water Assets, Transferrable Water (Volume) Long-term Water Assets, Transferrable Water (Volume) Pension Adjustments Prior Service Cost Pension Adjustments Prior Service Cost [Member] Year two Debt Securities, Available for Sale Securities, Excluding Accrued Interest, Maturities, Year Two, at Par Debt Securities, Available for sale securities maturities, year two, at par. Material Terms of Trading Arrangement Material Terms of Trading Arrangement [Text Block] Net operating loss carryforwards, indefinitely Deferred Tax Assets, Operating Loss Carryforwards, Not Subject to Expiration Investment in unconsolidated joint ventures Payments to Acquire Interest in Joint Venture Total water purchase contracts Long-term Water Assets, Intangible Water Contracts (Volume) Long-term Water Assets, Intangible Water Contracts (Volume) Consolidation Items [Axis] Consolidation Items [Axis] Counterparty Name [Axis] Counterparty Name [Axis] Entity Incorporation, State or Country Code Entity Incorporation, State or Country Code Non-NEOs Non-NEOs [Member] Percentage of rentable space occupied Joint Venture, Percentage of Rentable Space Occupied Joint Venture, Percentage of Rentable Space Occupied UNITED STATES