Acres of land related to land liens Acres of Land Related to Land Liens Acres of land related to land liens. Consolidated Entities [Axis] Consolidated Entities [Axis] Variable Rate [Domain] Variable Rate [Domain] Other Other Employee-related Liabilities, Current Net income attributable to non-controlling interest Net Income (Loss) Attributable to Noncontrolling Interest Cost of sales Cost of Purchased Water Schedule of Accrued Liabilities and Other Schedule of Accrued Liabilities [Table Text Block] Statistical Measurement [Domain] Statistical Measurement [Domain] Line of credit facility Line of Credit Facility, Maximum Borrowing Capacity Changes in operating assets and liabilities: Increase (Decrease) in Operating Capital [Abstract] Related Party Transaction [Line Items] Related Party Transaction [Line Items] Corporate notes Corporate notes Corporate Note Securities [Member] Schedule of Components of Segment Revenues Revenue from External Customers by Products and Services [Table Text Block] Award Type [Domain] Award Type [Domain] Investment, Name [Domain] Investment, Name [Domain] 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 March 17, 2022 March 17, 2022 [Member] March 17, 2022 LINE OF CREDIT AND LONG-TERM DEBT Debt Disclosure [Text Block] Statement of Stockholders' Equity [Abstract] Statement of Stockholders' Equity [Abstract] Accrued long-term water assets included in current liabilities Accrued Long-term Water Assets Included in Current Liabilities Accrued Long-term Water Assets Included in Current Liabilities December 16, 2023 December 16, 2023 [Member] December 16, 2023 Investments, Debt and Equity Securities [Abstract] Investments, Debt and Equity Securities [Abstract] Revolving Credit Facility Revolving Credit Facility [Member] June 16, 2023 June 16, 2023 [Member] June 16, 2023 Equity Method Investments and Joint Ventures [Abstract] Equity Method Investments and Joint Ventures [Abstract] Deferred tax liability Deferred Income Tax Liabilities, Net Performance share grants Performance Shares [Member] Segment Reporting [Abstract] Segment Reporting [Abstract] Trade accounts payable Accounts Payable, Current Non-cash tenant allowance amortization Equity Method Investment, Summarized Financial Information, Tenant Allowance Amortization Equity Method Investment, Summarized Financial Information, Tenant Allowance Amortization Investment, Name [Axis] Investment, Name [Axis] Total other income Nonoperating Income (Expense) Commitments and contingencies (Note 11) Commitments and Contingencies Treasury/Corporate Notes Defined Benefit Plan, Debt Security [Member] Cost of purchased water (per acre-foot) Cost of Purchased Water, Area Cost of Purchased Water, Area TRCC/Rock Outlet Center, LLC TRCC/Rock Outlet Center [Member] TRCC/Rock Outlet Center [Member] EQUITY Equity [Text Block] Line of Credit Facility [Line Items] Line of Credit Facility [Line Items] INCOME TAXES Income Tax Disclosure [Text Block] BASIS OF PRESENTATION Business Description and Basis of Presentation [Text Block] Ownership [Axis] Ownership [Axis] Schedule of Other Liabilities Other Liabilities [Table Text Block] TRC-MRC 3, LLC TRC-MRC 3 LLC [Member] TRC-MRC 3 LLC [Member] Current Liabilities: Liabilities, Current [Abstract] Letter of credit renewal period Letter of Credit Renewal Period Letter of credit renewal period. Net (loss) income per share attributable to common stockholders, diluted (in dollars per share) Earnings Per Share, Diluted Property, Plant and Equipment [Table] Property, Plant and Equipment [Table] Accounts receivable Accounts Receivable, after Allowance for Credit Loss, Current Excess tax benefit from stock-based compensation Excess Tax (Expense) Benefit From Stock-Based Compensation Excess Tax (Expense) Benefit From Stock-Based Compensation 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) 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 Debt pay off Extinguishment of Debt, Amount Transferable water Transferable Water [Member] Transferable water. Schedule of Components of Net Periodic Pension Cost Schedule of Net Benefit Costs [Table Text Block] Total Stock Compensation Costs Share-Based Payment Arrangement, Accelerated Cost Fair Value Debt Securities, Available-for-Sale, Excluding Accrued Interest Trading Symbol Trading Symbol Letters of credit outstanding amount Letters of Credit Outstanding, Amount 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. Income tax benefit related to other comprehensive income items Other Comprehensive Income (Loss), Tax Net (loss) income attributable to common stockholders Net Income (Loss) Total current liabilities Liabilities, Current 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) 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 LIABILITIES AND EQUITY Liabilities and Equity [Abstract] Finite-Lived Intangible Assets [Line Items] Finite-Lived Intangible Assets [Line Items] Schedule of Equity Method Investments [Table] Schedule of Equity Method Investments [Table] Additional reimbursement funds Additional Reimbursement Funds Additional reimbursement funds. MARKETABLE SECURITIES Investments in Debt and Marketable Equity Securities (and Certain Trading Assets) Disclosure [Text Block] Tejon Ranch Co. Stockholders’ Equity Equity, Attributable to Parent [Abstract] Gross unrealized holding losses Debt Securities, Available-for-Sale, Accumulated Gross Unrealized Loss, before Tax Equity method investment, deferred gain on sale Equity Method Investment, Deferred Gain on Sale East CFD East Community Facilities Districts [Member] -- None. No documentation exists for this element. -- Water contracts and related costs Related Party Transaction, Amounts of Transaction Schedule of Weighted Average Number of Shares Outstanding Schedule of Weighted Average Number of Shares [Table Text Block] 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] Level 1 Fair Value, Inputs, Level 1 [Member] Cost Reported Value Measurement [Member] Real estate and improvements - held for lease, net Real estate and improvements - held for lease, net Inventory, Real Estate, Improvements Equity Components [Axis] Equity Components [Axis] Financial Instruments [Domain] Financial Instruments [Domain] Certificates of deposit Certificates of Deposit [Member] Measurement Basis [Axis] Measurement Basis [Axis] Entity Small Business Entity Small Business Long-term water assets (in acre-feet) Long-term Water Assets (Volume) Long-term Water Assets (Volume) Local Phone Number Local Phone Number Fair Value Measurement [Domain] Fair Value Measurement [Domain] Forecast Forecast [Member] Ranchcorp Subsidiaries [Member] Decline in market value OCI, Debt Securities, Available-for-Sale, Unrealized Holding Gain (Loss), before Adjustment, after Tax TRC-MRC 2, LLC TRC-MRC 2 LLC [Member] TRC-MRC 2 LLC [Member] Schedule of Maturities, at Par, of Marketable Securities by Year Investments Classified by Contractual Maturity Date [Table Text Block] Revenue from External Customer [Line Items] Revenue from External Customer [Line Items] Retirement Plan Type [Domain] Retirement Plan Type [Domain] Debt Instrument, Name [Domain] Debt Instrument, Name [Domain] WRMWSD - Contracts with the Company Wheeler Ridge Maricopa Water Storage District Wheeler Ridge Maricopa Water Storage District [Member] Wheeler Ridge Maricopa Water Storage District [Member] Retirement Benefits [Abstract] Retirement Benefits [Abstract] Fair value per share at grant date (in dollars per share) Share-based Compensation Arrangement by Share-based Payment Award, Fair Value at Grant Date Share-based Compensation Arrangement by Share-based Payment Award, Fair Value at Grant Date 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 Service period Defined Benefit Plan, Average Service Period Defined Benefit Plan, Average Service Period Excess joint venture distributions and other (See Note 14) Other Sundry Liabilities, Noncurrent Portion at Fair Value Measurement Portion at Fair Value Measurement [Member] Line of Credit Facility [Table] Line of Credit Facility [Table] Accrued interest receivable balance Accrued Investment Income Receivable Shares withheld for taxes and tax benefit of vested shares Share-Based Payment Arrangement, Decrease for Tax Withholding Obligation AVEK Antelope Valley East Kern Water Agency [Member] Antelope valley east kern water agency. 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 Equity in Earnings (Loss) Equity Method Investment Summarized Financial Information, Equity In Earnings (Loss) Equity Method Investment Summarized Financial Information, Equity In Earnings (Loss) Revenues Revenues Revenues Income tax payables Accrued Income Taxes, Current Payables and Accruals [Abstract] Payables and Accruals [Abstract] Product and Service [Domain] Product and Service [Domain] Standby Letter of Credit Standby Letters of Credit [Member] Investing Activities Net Cash Provided by (Used in) Investing Activities [Abstract] Award Type [Axis] Award Type [Axis] Restricted stock excluded from the calculation of dilutive net income per share (in shares) Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount Shares granted (in shares) New stock grants/additional shares due to achievement in excess of target (in shares) Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Grants in Period Accrued capital expenditures included in current liabilities Change In Capital Expenditures Incurred But Not Yet Paid Change In Capital Expenditures Incurred But Not Yet Paid Plan Name [Domain] Plan Name [Domain] Tejon Ranch Commerce Center Inventory, Real Estate, Improvements, Gross Inventory, Real Estate, Improvements, Gross Document Quarterly Report Document Quarterly Report Unrecognized compensation cost Share-Based Payment Arrangement, Nonvested Award, Excluding Option, Cost Not yet Recognized, Amount Fair Value Hierarchy and NAV [Domain] Fair Value Hierarchy and NAV [Domain] Annual fee increase Long Term Water Assets, Purchased, Annual Fee Increase, Percent Long Term Water Assets, Purchased, Annual Fee Increase, Percent Stockholders' Equity Note [Abstract] Stockholders' Equity Note [Abstract] RELATED PARTY TRANSACTIONS Related Party Transactions Disclosure [Text Block] Expected return on plan assets Defined Benefit Plan, Expected Return (Loss) on Plan Assets Entity File Number Entity File Number Loss Contingencies [Table] Loss Contingencies [Table] Revenues Revenue from Purchased Water Revenue from Purchased Water Real Estate [Abstract] Real Estate [Abstract] Current liabilities Increase (Decrease) in Operating Liabilities Entity Shell Company Entity Shell Company Net cost of purchased water contracts Finite-Lived Intangible Assets, Net Property, Plant and Equipment [Line Items] Property, Plant and Equipment [Line Items] New Accounting Pronouncements and Climate Change Related Update by SEC Effective in Future Periods New Accounting Pronouncements, Policy [Policy Text Block] Award Date [Domain] Award Date [Domain] 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) Counterparty Name [Domain] Counterparty Name [Domain] August 21, 2023 August 21, 2023 [Member] August 21, 2023 Cash, cash equivalents, and restricted cash at beginning of period Cash, cash equivalents, and restricted cash at end of period Total cash, cash equivalents, and restricted cash Cash, Cash Equivalents, Restricted Cash, and Restricted Cash Equivalents Accumulated Depreciation Finite-Lived Intangible Assets, Accumulated Amortization Current investment mix Defined Benefit Plan, Plan Assets, Actual Allocation, Percentage Total Equity Method Investment, Nonconsolidated Investee or Group of Investees [Member] Grapevine Grapevine [Member] Grapevine [Member] Long Lived Assets Held-for-sale by Asset Type [Axis] Long-Lived Assets Held-for-Sale by Asset Type [Axis] SWP Water Contracts State Water Project Contracts [Member] State water project contracts. Common stock, issued shares (in shares) Common Stock, Shares, Issued Profit margin Earnings (Loss) Gross Profit Vested grants (in shares) Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Vested in Period Deferred income Contract with Customer, Liability, Current Dudley-Ridge water rights Dudley Ridge Water Rights [Member] Dudley Ridge Water Rights [Member] Security Exchange Name Security Exchange Name Accumulated other comprehensive loss Accumulated Other Comprehensive Income (Loss), Net of Tax 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] Unrealized (loss) gain on available-for-sale securities OCI, Debt Securities, Available-for-Sale, Gain (Loss), after Adjustment, before Tax Total compensation cost not yet recognized, period for recognition Share-Based Payment Arrangement, Nonvested Award, Cost Not yet Recognized, Period for Recognition Supplemental executive retirement plan liability (See Note 12) Liability, Pension and Other Postretirement and Postemployment Benefits, Noncurrent Total expenses Segment losses Commercial/industrial expenses Costs and Expenses Taxes on vested stock grants Proceeds from (Payments for) Other Financing Activities Maximum Maximum [Member] Comprehensive (loss) income attributable to common stockholders Comprehensive Income (Loss), Net of Tax, Attributable to Parent Total compensation cost not yet recognized Share-Based Payment Arrangement, Nonvested Award, Cost Not yet Recognized, Amount Document Type Document Type Entity Address, Address Line One Entity Address, Address Line One PEF Pastoria Energy Facility, LLC [Member] Pastoria Energy Facility, LLC [Member] TRCC-East TRCC-East [Member] TRCC-East [Member] Non-cash retirement plan expense Pension and Other Postretirement Benefits Cost (Reversal of Cost) Consolidated joint venture, ownership interest Subsidiary, Ownership Percentage, Parent Petro Travel Plaza Holdings, LLC Petro Travel Plaza Holdings, LLC Petro Travel Holdings Llc Plaza [Member] Petro travel holdings llc plaza. December 16, 2021 December 16, 2021 [Member] December 16, 2021 Fair market value of investment securities below their 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. Schedule of Finite-Lived Intangible Assets Schedule of Finite-Lived Intangible Assets [Table Text Block] Variable Rate [Axis] Variable Rate [Axis] Statement of Operations Income Statement [Abstract] Costs and Expenses: Costs and Expenses [Abstract] Title of 12(b) Security Title of 12(b) Security Defined Benefit Plan, Plan Assets, Category [Axis] Defined Benefit Plan, Plan Assets, Category [Axis] Long Lived Assets Held-for-sale, Name [Domain] Long-Lived Assets Held-for-Sale, Name [Domain] Related Party [Domain] Related Party, Type [Domain] (Cost)/earnings components: Defined Benefit Plan, Net Periodic Benefit Cost (Credit) [Abstract] Operating Segments Operating Segments [Member] Income Tax Disclosure [Abstract] Income Tax Disclosure [Abstract] Total water held for future use and purchased water contracts Long Term Water Assets, Contracts with Company Long Term Water Assets, Contracts with Company Estimated tax of change in value of available-for-sale securities OCI, Debt Securities, Available-for-Sale, Unrealized Holding Gain (Loss), before Adjustment, Tax Share-based Payment Arrangement [Abstract] Share-Based Payment Arrangement [Abstract] Entity Tax Identification Number Entity Tax Identification Number Investment in unconsolidated joint ventures Equity Equity Method Investments Ranch operations Ranch Operations [Member] Ranch Operations [Member] Inventories Inventory, Net Funds invested in marketable securities Payments to Acquire Marketable Securities Land Land [Member] Capitalized Share-Based Payment Arrangement, Amount Capitalized Statistical Measurement [Axis] Statistical Measurement [Axis] REAL ESTATE Real Estate Disclosure [Text Block] Financial Instrument [Axis] Financial Instrument [Axis] Other Liabilities Other Liabilities [Abstract] Entity Interactive Data Current Entity Interactive Data Current Debt Securities, Available-for-sale [Table] Debt Securities, Available-for-Sale [Table] Entity Common Stock Shares Outstanding Entity Common Stock, Shares Outstanding Total Stockholders' Equity Parent [Member] Segments [Domain] Segments [Domain] Share-based Compensation Arrangement by Share-based Payment Award [Line Items] Share-Based Compensation Arrangement by Share-Based Payment Award [Line Items] Fair Value Hierarchy and NAV [Axis] Fair Value Hierarchy and NAV [Axis] Consolidation Items [Domain] Consolidation Items [Domain] Retained earnings Retained Earnings (Accumulated Deficit) Commitments and Contingencies Disclosure [Abstract] Commitments and Contingencies Disclosure [Abstract] Restricted stock issuance (in shares) Stock Issued During Period, Shares, Restricted Stock Award, Gross Additional bond debt authorized to be sold in future Debt instrument face amount Debt Instrument, Face Amount Five West Parcel Llc Five West Parcel Llc [Member] Five west parcel llc. Entity Incorporation, State or Country Code Entity Incorporation, State or Country Code Current Assets: Assets, Current [Abstract] Equity Method Investment, Nonconsolidated Investee [Domain] Equity Method Investment, Nonconsolidated Investee [Domain] Entity Address, State or Province Entity Address, State or Province 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] Counterparty Name [Axis] Counterparty Name [Axis] Operating Activities Net Cash Provided by (Used in) Operating Activities [Abstract] Schedule of Related Party Transactions, by Related Party [Table] Schedule of Related Party Transactions, by Related Party [Table] Amount paid for water contracts Operating Lease, Payments Schedule of Stock Compensation Costs for Employee and NDSI Plans Share-Based Payment Arrangement, Cost by Plan [Table Text Block] Common stock, outstanding shares (in shares) Beginning balance (in shares) Ending balance (in shares) Common Stock, Shares, Outstanding 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 TRC-MRC 1, LLC TRC-MRC 1 LLC [Member] TRC-MRC 1 LLC [Member] Interest cost Defined Benefit Plan, Interest Cost Real estate - resort/residential Resort and Residential Real Estate [Member] Resort and Residential Real Estate [Member] Defined Benefit Plan Disclosure [Line Items] Defined Benefit Plan Disclosure [Line Items] RETIREMENT PLANS Retirement Benefits [Text Block] DMB DMB Pacific LLC [Member] DMB Pacific LLC [Member] Executive Vice President and Chief Operating Officer Management [Member] Decrease in outstanding amount Debt Instrument, Increase (Decrease), Net Number of directors Number of Directors Number of Directors Common stock, par value per share (in dollars per share) Common Stock, Par or Stated Value Per Share Water Water [Member] Net cash provided by investing activities Net Cash Provided by (Used in) Investing Activities Mountain Village Tejon Mountain Village Llc [Member] Tejon mountain village llc. Contributions to defined benefit plan Defined Benefit Plan, Expected Future Employer Contributions, Remainder of Fiscal Year Debt Instrument [Axis] Debt Instrument [Axis] Name of Property [Domain] Name of Property [Domain] Effective income tax rate Effective Income Tax Rate Reconciliation, Percent Credit Facility [Axis] Credit Facility [Axis] Schedule of Long Lived Assets Held-for-sale [Table] Long-Lived Assets Held-for-Sale [Table] Total liabilities Liabilities Expected volatility Share-Based Compensation Arrangement by Share-Based Payment Award, Fair Value Assumptions, Expected Volatility Rate 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 Vesting [Domain] Vesting [Domain] Accumulated Other Comprehensive Loss AOCI Attributable to Parent [Member] LONG-TERM WATER ASSETS Property, Plant and Equipment Disclosure [Text Block] 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 Commercial and Industrial [Member] Commercial and industrial. Long-term deferred gains Contract with Customer, Liability, Noncurrent Accrued bonus Accrued Bonuses, Current 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 [Member] Mineral Resources [Member] Plan Name [Axis] Plan Name [Axis] ACCRUED LIABILITIES AND OTHER Accounts Payable and Accrued Liabilities Disclosure [Text Block] TRC-MRC 4, LLC TRC-MRC 4 LLC [Member] TRC-MRC 4 LLC Debt Disclosure [Abstract] Debt Disclosure [Abstract] Related Party Transaction [Domain] Related Party Transaction [Domain] Long-Lived Tangible Asset [Domain] Long-Lived Tangible Asset [Domain] Assumptions used in determining periodic pension cost: Defined Benefit Plan, Weighted Average Assumptions Used in Calculating Net Periodic Benefit Cost [Abstract] Number of reportable segments Number of Reportable Segments Issued and outstanding shares - $26,797,440 at March 31, 2024 and 26,770,545 at December 31, 2023 Common Stock, Value, Issued Other comprehensive loss before taxes Other Comprehensive Income (Loss), before Tax Total current assets Assets, Current Investment income Investment Income, Net Investments in unconsolidated joint ventures Investments in and Advance to Affiliates, Subsidiaries, Associates, and Joint Ventures Schedule of Defined Benefit Plans Disclosures [Table] Schedule of Defined Benefit Plans Disclosures [Table] Total net periodic pension cost Defined Benefit Plan, Net Periodic Benefit Cost (Credit) Letter of credit period Letter of credit period Letter of credit period. Restricted cash (Shown in prepaid expenses and other current assets) Restricted cash Restricted Cash Non-cash investing activities Supplemental Cash Flow Information [Abstract] Other (loss) income, net Other Nonoperating Income (Expense) Entity Filer Category Entity Filer Category Schedule of Equity Method Investments [Line Items] Schedule of Equity Method Investments [Line Items] Value of property contributed Contribution of Property Majestic Realty Co. Majestic Realty Co. [Member] Majestic Realty Co. [Member] Statement [Table] Statement [Table] Real estate development (includes $121,133 at March 31, 2024 and $119,788 at December 31, 2023, attributable to CFL, Note 14) Real estate development Inventory, Real Estate, Land and Land Development Costs Current Fiscal Year End Date Current Fiscal Year End Date 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 Employee 1998 Plan Stock Incentive Plan 1998 [Member] Stock incentive plan. 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 [Table Text Block] December 14, 2022 December 14, 2022 [Member] December 14, 2022 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] SERP Supplemental Employee Retirement Plan [Member] Area of building owned and leased Lease of Building Lease of building. Recharged project water Long-term Water Assets, Recharged Project Water (Volume) Long-term Water Assets, Recharged Project Water (Volume) Net cash provided by operating activities Net Cash Provided by (Used in) Operating Activities INVESTMENT IN UNCONSOLIDATED AND CONSOLIDATED JOINT VENTURES Equity Method Investments and Joint Ventures Disclosure [Text Block] Marketable securities - available-for-sale Debt Securities, Available-for-Sale, Current Number of tenants Joint Venture, Number Of Tenants Joint Venture, Number Of Tenants Investments in water assets Payments to Acquire Other Investments Accrued liabilities and other Accrued liabilities and other Other Accrued Liabilities, Current Corporate expenses Corporate, Non-Segment [Member] Depreciation and amortization Depreciation, Depletion and Amortization Stated interest rate Debt Instrument, Interest Rate, Stated Percentage Balance Sheet Information Statement of Financial Position [Abstract] Total Tejon Ranch Co. Stockholders’ Equity Equity, Attributable to Parent Consolidation Items [Axis] Consolidation Items [Axis] Number of acres for development Development of Building Development of building. Schedule of Finite-Lived Intangible Assets [Table] Schedule of Finite-Lived Intangible Assets [Table] Schedule of Share-based Compensation Arrangements by Share-based Payment Award [Table] Schedule of Share-Based Compensation Arrangements by Share-Based Payment Award [Table] Finite-Lived Intangible Assets, Major Class Name [Domain] Finite-Lived Intangible Assets, Major Class Name [Domain] (Loss) income before income tax expense Income (Loss) from Continuing Operations before Income Taxes, Noncontrolling Interest Long-Lived Tangible Asset [Axis] Long-Lived Tangible Asset [Axis] TRC-MRC 5, LLC TRC-MRC 5 LLC [Member] TRC-MRC 5 LLC Level 2 Fair Value, Inputs, Level 2 [Member] 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. Secured Overnight Financing Rate (SOFR) Secured Overnight Financing Rate (SOFR) [Member] Secured Overnight Financing Rate (SOFR) Entity Emerging Growth Company Entity Emerging Growth Company Annual cost related to the letter of credit Debt Issuance Costs, Net Effective interest rate Debt Instrument, Interest Rate, Effective Percentage Increase (Decrease) in Stockholders' Equity [Roll Forward] Increase (Decrease) in Stockholders' Equity [Roll Forward] Document Fiscal Period Focus Document Fiscal Period Focus Stock compensation expense Share-Based Payment Arrangement, Noncash Expense Farming Farming and Agriculture [Member] Farming and agriculture. Common Stock Common Stock [Member] Schedule of Tangible Water Assets Tangible Water Assets [Table Text Block] Tangible Water Assets [Table Text Block] City Area Code City Area Code Entity Address, Postal Zip Code Entity Address, Postal Zip Code Product and Service [Axis] Product and Service [Axis] Schedule of Stock Grant Activity Schedule of Nonvested Share Activity [Table Text Block] Unconsolidated joint ventures, ownership interest Equity Method Investment, Ownership Percentage Document Fiscal Year Focus Document Fiscal Year Focus Total equity Beginning balance, value Ending balance, value Equity (Deficit) Equity, Including Portion Attributable to Noncontrolling Interest Acres of land Related Party Transaction, Area of Land Related Party Transaction, Area of Land Accrued vacation Accrued Vacation, Current Schedule of Components of Water Assets Disclosure of Long-Lived Assets Held-for-Sale [Table Text Block] Minimum Minimum [Member] Option to extend term Long-term Water Assets, Extension Term Long-term Water Assets, Extension Term Weighted-average number of shares outstanding: Weighted Average Number of Shares Outstanding, Diluted [Abstract] Property and equipment, net Property, Plant and Equipment, Net Distribution of earnings from unconsolidated joint ventures Proceeds from Equity Method Investment, Distribution Revolving Line of Credit Revolving Line of Credit [Member] Revolving Line of Credit Finite-Lived Intangible Assets by Major Class [Axis] Finite-Lived Intangible Assets by Major Class [Axis] Other comprehensive loss Other comprehensive loss Other Comprehensive Income (Loss), Net of Tax Statement of Cash Flows [Abstract] Statement of Cash Flows [Abstract] Property tax payable Accrual for Taxes Other than Income Taxes, Current ASSETS Assets [Abstract] Goodwill and Intangible Assets Disclosure [Abstract] Goodwill and Intangible Assets Disclosure [Abstract] Tulare Lake Basin water rights Tulare Lake Basin Water Rights [Member] Tulare Lake Basin Water Rights [Member] Net (loss) income Net (loss) income Net (loss) income Net income (loss) Net Income (Loss), Including Portion Attributable to Noncontrolling Interest Net cash used in financing activities Net Cash Provided by (Used in) Financing Activities Centennial Centennial Founders LLC [Member] Centennial Founders LLC Retirement Plan Type [Axis] Retirement Plan Type [Axis] COMMITMENTS AND CONTINGENCIES Commitments and Contingencies Disclosure [Text Block] Retained Earnings Retained Earnings [Member] West CFD West Community Facilities Districts [Member] West community facilities districts. Amortization of discount of marketable securities Accretion (Amortization) of Discounts and Premiums, Investments TOTAL LIABILITIES AND EQUITY Liabilities and Equity 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. Other Income (Loss): Nonoperating Income (Expense) [Abstract] Other assets Other Assets, Noncurrent Ownership [Domain] Ownership [Domain] Risk-free interest rate Share-Based Compensation Arrangement by Share-Based Payment Award, Fair Value Assumptions, Risk Free Interest Rate Net (loss) income per share attributable to common stockholders, basic (in dollars per share) Earnings Per Share, Basic Accounting Policies [Abstract] Accounting Policies [Abstract] Equity method investment Equity Method Investment Summarized Financial Information, Investment Equity Method Investment Summarized Financial Information, Investment Total Debt Securities, Available for Sale Securities, Excluding Accrued Interest, Maturities at Par Debt Securities, Available for sale securities maturities, at par. 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 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 Entity Address, City or Town Entity Address, City or Town Contract-based Intangible Assets Contract-Based Intangible Assets [Member] Acre-Feet Sold Long Term Water Assets, Water Sold (Volume) Long Term Water Assets, Water Sold (Volume) Long-term Debt, Current and Noncurrent [Abstract] Long-Term Debt, Current and Noncurrent [Abstract] 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. Reimbursement proceeds from Community Facilities District Payments for Proceeds from Other Investing Activities, Business Three Payments for (Proceeds from) Other Investing Activities, Business Three Document Transition Report Document Transition Report Financial Instruments Fair Value of Financial Instruments, Policy [Policy Text Block] 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] Tejon-Castac Water District Tejon-Castac Water District [Member] Tejon-Castac Water District [Member] Maturities and sales of marketable securities Proceeds from Sale and Maturity of Marketable Securities Common stock, authorized shares (in shares) Common Stock, Shares Authorized Additional costs for future years Additional Reimbursement Funds, Costs Reserved For Future Years Additional Reimbursement Funds, Costs Reserved For Future Years Marketable Securities, with unrealized gains Gross unrealized holding gains Debt Securities, Available-for-Sale, Accumulated Gross Unrealized Gain, before Tax Long Lived Assets Held-for-sale [Line Items] Long-Lived Assets Held-for-Sale [Line Items] Other Liabilities Disclosure [Abstract] Other Liabilities Disclosure [Abstract] 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 Unrealized loss on interest rate swap Other Comprehensive Income (Loss), Cash Flow Hedge, Gain (Loss), after Reclassification, before Tax Adjustments to reconcile net (loss) income to net cash provided by operating activities: Adjustments to Reconcile Net Income (Loss) to Cash Provided by (Used in) Operating Activities [Abstract] Related Party Transactions [Abstract] Related Party Transactions [Abstract] Restricted Cash Cash and Cash Equivalents, Restricted Cash and Cash Equivalents, Policy [Policy Text Block] 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 Contract renewal optional term Long Term Water Assets, Contract Renewal Optional Term Long Term Water Assets, Contract Renewal Optional Term Long-term Water Assets [Line Items] Long-term Water Assets [Line Items] Long-term Water Assets [Line Items] Equity Method Investment, Nonconsolidated Investee [Axis] Equity Method Investment, Nonconsolidated Investee [Axis] Comprehensive income attributable to non-controlling interests Comprehensive Income (Loss), Net of Tax, Attributable to Noncontrolling Interest Annual option payment Long Term Water Assets, Purchased, Annual Option Payment, Percent Long Term Water Assets, Purchased, Annual Option Payment, Percent Restricted stock issuance Stock Issued During Period, Value, Restricted Stock Award, Gross Deferred income taxes Deferred Income Tax Expense (Benefit) Statement of Comprehensive Income [Abstract] Statement of Comprehensive Income [Abstract] (Gain) loss on sale of property plant and equipment Gain (Loss) on Disposition of Property Plant Equipment, Excluding Oil and Gas Property and Timber Property Market-Based, Cash-Settled Awards Market-Based, Cash-Settled Awards [Member] Market-Based, Cash-Settled Awards Prepaid expenses and other current assets Prepaid Expense and Other Assets, Current Current investment policy targets: Defined Benefit Plan, Plan Assets, Allocations [Abstract] Expired/forfeited grants (in shares) Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Forfeited in Period Profit Gross Profit from Purchased Water Gross Profit from Purchased Water Schedule of Real Estate Schedule of Real Estate Properties [Table Text Block] Distribution of equity from unconsolidated joint ventures Proceeds from Equity Method Investment, Distribution, Return of Capital Number of community facility districts Number of Community Facility Districts Number of Community Facility Districts Share price (in dollars per share) Share Price Reconciliation to amounts on consolidated balance sheets: Cash and Cash Equivalents, at Carrying Value [Abstract] Related Party [Axis] Related Party, Type [Axis] U.S. Treasury and agency notes U.S. Treasury and agency notes US Treasury and Government Short-Term Debt Securities [Member] Performance-Based Cash-Settled Awards Performance-Based Cash-Settled Awards [Member] Performance-Based Cash-Settled Awards Entity Registrant Name Entity Registrant Name Common stock equivalents (in shares) Incremental Common Shares Attributable to Dilutive Effect of Share-Based Payment Arrangements Tranche Two Share-Based Payment Arrangement, Tranche Two [Member] Non-controlling interest Equity, Attributable to Noncontrolling Interest Document Period End Date Document Period End Date Operating results from commercial/industrial and unconsolidated joint ventures Operating Income (Loss), Including Equity In Earnings Of Unconsolidated Joint Ventures Operating Income (Loss), Including Equity In Earnings Of Unconsolidated Joint Ventures Repayments of long-term debt Repayments of Long-Term Debt Entity Central Index Key Entity Central Index Key Total fair value of award Employee and Director - expensed Share-Based Payment Arrangement, Expense Costs Finite-Lived Intangible Assets, Gross Income tax (benefit) expense Income Tax Expense (Benefit) Vesting [Axis] Vesting [Axis] Profit from water sales Profit from water sales Gain (Loss) on Sale of Other Investments Award Date [Axis] Award Date [Axis] Marketable Securities with unrealized losses for more than 12 months Debt Securities, Available-for-Sale, Continuous Unrealized Loss Position, 12 Months or Longer, Accumulated Loss Debt Securities, Available-for-sale [Line Items] Debt Securities, Available-for-Sale [Line Items] Total revenues Commercial/industrial revenues Revenue from Contract with Customer, Excluding Assessed Tax Amendment Flag Amendment Flag 2024 Debt Securities, Available for Sale Securities, Excluding Accrued Interest, Maturities Year One at Par Debt Securities, Available for sale securities maturities, year one, at par. Money Market Funds Money Market Funds [Member] Net amortization and deferral Defined Benefit Plan, Amortization of Gain (Loss) Cash and Cash Equivalents, Period Increase (Decrease) [Abstract] Cash, Cash Equivalents, Restricted Cash, and Restricted Cash Equivalents, Period Increase (Decrease), Including Exchange Rate Effect [Abstract] Marketable Securities, with unrealized losses for less than 12 months Debt Securities, Available-for-Sale, Continuous Unrealized Loss Position, Less than 12 Months, Accumulated Loss Cash and cash equivalents Cash and cash equivalents Cash and Cash Equivalents, at Carrying Value Shares withheld for taxes and tax benefit of vested shares (in shares) Share-Based Payment Arrangement, Shares Withheld for Tax Withholding Obligation Comprehensive (loss) income Comprehensive Income (Loss), Net of Tax, Including Portion Attributable to Noncontrolling Interest 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 Credit Facility [Domain] Credit Facility [Domain] Number of option to extend additional years Long-term Water Assets, Number of Options to Extend Long-term Water Assets, Number of Options to Extend Nickel water rights Nickel Water Rights [Member] Nickel Water Rights [Member] Proceeds from water sales Proceeds from sale of other investments Proceeds from Sale of Other Investments Discount rate Defined Benefit Plan, Assumptions Used Calculating Net Periodic Benefit Cost, Discount Rate Diluted shares outstanding (in shares) Weighted Average Number of Shares Outstanding, Diluted Debt Debt Equity Method Investment Summarized Financial Information, Borrowings Equity Method Investment Summarized Financial Information, Borrowings Receivables, inventories, prepaids and other assets, net Increase (Decrease) in Operating Assets Special taxes paid Taxes, Other Real estate and equipment expenditures Payments to Acquire Property, Plant, and Equipment Additional paid-in capital Additional Paid in Capital, Common Stock Additional Paid-In Capital Additional Paid-in Capital [Member] TOTAL ASSETS Assets Assets 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 Loss Contingencies [Line Items] Loss Contingencies [Line Items] Cover [Abstract] Cover [Abstract] Tejon Ranch Commerce Center Tejon Ranch Commerce Center [Member] Tejon Ranch Commerce Center [Member] Stock compensation APIC, Share-Based Payment Arrangement, Increase for Cost Recognition Cost Debt Securities, Available-for-Sale, Amortized Cost, Excluding Accrued Interest, before Allowance for Credit Loss OTHER LIABILITIES Other Liabilities Disclosure [Text Block] Other liabilities Total Other Liabilities, Noncurrent Accrued paid personal leave Accrued Paid Personal Leave, Current Accrued Paid Personal Leave, Current Defined Benefit Plan, Plan Assets, Category [Domain] Defined Benefit Plan, Plan Assets, Category [Domain] Pension Plan Pension Plan [Member] REPORTING SEGMENTS AND RELATED INFORMATION Segment Reporting Disclosure [Text Block] Increase in cash and cash equivalents Cash, Cash Equivalents, Restricted Cash, and Restricted Cash Equivalents, Period Increase (Decrease), Including Exchange Rate Effect Financing Activities Net Cash Provided by (Used in) Financing Activities [Abstract] (Loss) income from operations before equity in earnings of unconsolidated joint ventures and income tax Income (Loss) from Continuing Operations before Equity Method Investments, Income Taxes, Noncontrolling Interest Equity Component [Domain] Equity Component [Domain] Purchased water contracts Purchased water contracts Long-term Water Assets, Water Contracts (Volume) Long-term Water Assets, Water Contracts (Volume) Water assets, volume available for purchase from 2017-2030 (up to) (in acre-feet) Long-term Water Assets (Volume), Amount After Year One Long-term Water Assets (Volume), Amount After Year One Rockefeller Joint Ventures Rockefeller Joint Ventures [Member] Rockefeller joint ventures. Contractual obligation for future water payments Contractual Obligation Scenario [Axis] Scenario [Axis] Common stock (in shares) Weighted Average Number of Shares Outstanding, Basic Entity Current Reporting Status Entity Current Reporting Status NDSI Plan Non-Employee Director Stock Incentive Plan [Member] Non-employee director stock incentive plan. Operating (loss) income Operating results from mineral resources Operating results from farming Operating results from ranch operations Operating Income (Loss) Transferable water Long-term Water Assets, Transferrable Water (Volume) Long-term Water Assets, Transferrable Water (Volume) 2025 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. Revenues: Revenues [Abstract] Consolidated Entities [Domain] Consolidated Entities [Domain] Revenue from External Customers by Products and Services [Table] Revenue from External Customers by Products and Services [Table] Total purchased water contracts Long-term Water Assets, Intangible Water Contracts (Volume) Long-term Water Assets, Intangible Water Contracts (Volume) Related Party Transaction [Axis] Related Party Transaction [Axis] Segments [Axis] Segments [Axis] Statement [Line Items] Statement [Line Items] Fair Value Estimate of Fair Value Measurement [Member] Other comprehensive (loss) income: Other Comprehensive Income (Loss), Net of Tax [Abstract] Scenario [Domain] Scenario [Domain] Schedule of Components of Long-term Debt Schedule of Debt [Table Text Block] Revolving line of credit Revolving line-of-credit Long-Term Line of Credit Schedule of Available-for-Sale Securities Debt Securities, Available-for-Sale [Table Text Block] Name of Property [Axis] Name of Property [Axis] Equity: Equity, Including Portion Attributable to Noncontrolling Interest [Abstract] Tranche One Share-Based Payment Arrangement, Tranche One [Member] Non-controlling Interest Noncontrolling Interest [Member] Percentage of rentable space Joint Venture, Percentage of Rentable Space Occupied Joint Venture, Percentage of Rentable Space Occupied Number of joint venture contracts Number of Joint Venture Contracts Number of joint venture contracts.