Acres of land related to land liens Acres of Land Related to Land Liens Acres of land related to land liens. Total revenues and other income Revenue and Other Income Revenue and Other Income Property Subject to or Available for Operating Lease [Line Items] Property, Plant, and Equipment, Lessor Asset under Operating Lease [Line Items] Consolidated Entities [Axis] Consolidated Entities [Axis] Variable Rate [Domain] Variable Rate [Domain] Other Other Employee-related Liabilities, Current Net income (loss) attributable to non-controlling interest Net Income (Loss) Attributable to Noncontrolling Interest Cost of sales Cost of Purchased Water Entity Voluntary Filers Entity Voluntary Filers 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 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] Deferred gains Deferred Tax Liabilities, Tax Deferred Income Investments, Debt and Equity Securities [Abstract] Investments, Debt and Equity Securities [Abstract] Revolving Credit Facility Revolving Credit Facility [Member] Schedule of Changes in Benefit Obligations and Plan Assets Schedule of Net Funded Status [Table Text Block] Amount recorded, net of taxes Accumulated Other Comprehensive (Income) Loss, Defined Benefit Plan, after Tax 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] Other Other Inventory, Net of Reserves 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 Commitments and Contingencies Debt Defined Benefit Plan, Debt Security [Member] Long-term debt, less current portion Debt, Long-Term and Short-Term, Excluding Current Maturities Debt, Long-Term and Short-Term, Excluding Current Maturities Consumer price per acre (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] Geographical [Axis] Geographical [Axis] Inventory write down Inventory Write-down INCOME TAXES Income Tax Disclosure [Text Block] Ownership [Axis] Ownership [Axis] 2028 Defined Benefit Plan, Expected Future Benefit Payment, Year Five Schedule of Other Liabilities Other Liabilities [Table Text Block] Concentration Risk [Line Items] Concentration Risk [Line Items] TRC-MRC 3, LLC TRC-MRC 3 LLC [Member] TRC-MRC 3 LLC [Member] Major Customers [Axis] Customer [Axis] Current Liabilities: Liabilities, Current [Abstract] Deferred Deferred Federal Income Tax Expense (Benefit) June 16 2023, 2 June 16 2023, 2 [Member] June 16 2023, 2 Permanent differences Effective Income Tax Rate Reconciliation, Change in Deferred Tax Assets Valuation Allowance, Amount Letter of credit renewal period Letter of Credit Renewal Period Letter of credit renewal period. Joint venture allocations Deferred Tax Liabilities, Investment in Noncontrolled Affiliates Net income (loss) 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) loss of 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) Land and land improvements Land and Land Improvements [Member] Schedule of Fair Value of Plan Assets by Investment Type Schedule of Allocation of Plan Assets [Table Text Block] Debt pay off Extinguishment of Debt, Amount 2024 Defined Benefit Plan, Expected Future Benefit Payment, Year One LEASES Lessor, Operating Leases [Text Block] Transferable water Transferable Water Transferable Water [Member] Transferable water. Schedule of Components of Net Periodic Pension Cost Schedule of Net Benefit Costs [Table Text Block] Stock compensation costs Share-Based Payment Arrangement, Accelerated Cost Buildings and improvements Building and Building Improvements [Member] Estimated 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. 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 Provision for income taxes related to other comprehensive income items Other Comprehensive Income (Loss), Tax Net 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) Derivative Contract [Domain] Derivative Contract [Domain] 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 Benefits/expenses paid Defined Benefit Plan, Plan Assets, Benefits Paid Excess distributions resulting in deficit balance Distributions in Excess of Investment in Unconsolidated Joint Venture Distributions in Excess of Investment in Unconsolidated Joint Venture 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 Concentration Risk Benchmark [Domain] Concentration Risk Benchmark [Domain] 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 2027 Lessor, Operating Lease, Payment to be Received, Year Four 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] SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES Significant Accounting Policies [Text Block] Level 1 Level 1 Fair Value, Inputs, Level 1 [Member] Cost Reported Value Measurement [Member] State deferred taxes Deferred Tax Liabilities, State Taxes Deferred Tax Liabilities, State Taxes Real estate and improvements - held for lease, net Real estate and improvements - held for lease, net Inventory, Real Estate, Improvements Schedule of Property and Equipment and their Respective Useful Lives Property, Plant and Equipment [Table Text Block] Equity Components [Axis] Equity Components [Axis] Financial Instruments [Domain] Financial Instruments [Domain] March 18, 2021 March 18, 2021 [Member] March 18, 2021 Certificates of deposit Certificates of Deposit [Member] Fair Value Derivative Assets (Liabilities), at Fair Value, Net 2025 Long-Term Debt, Maturity, Year Two Measurement Basis [Axis] Measurement Basis [Axis] Entity Small Business Entity Small Business Long-term water assets (Volume) Long-term water assets (Volume) (in acre-feet) Long-term Water Assets (Volume) Long-term Water Assets (Volume) Machinery, furniture fixtures and other equipment Other Machinery and Equipment [Member] Local Phone Number Local Phone Number Fair Value Measurement [Domain] Fair Value Measurement [Domain] Forecast Forecast [Member] Ranchcorp Subsidiaries [Member] Notional Amount Derivative, Notional Amount Securities, available-for-sale, decrease in market value OCI, Debt Securities, Available-for-Sale, Unrealized Holding Gain (Loss), before Adjustment, after Tax Funded status: Defined Benefit Plan, Funded (Unfunded) Status of Plan [Abstract] 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] 18-19 West, LLC Eighteen Nineteen West Llc [Member] Eighteen nineteen west llc. Debt Instrument, Name [Domain] Debt Instrument, Name [Domain] Wheeler Ridge Maricopa Water Storage District Wheeler Ridge Maricopa Water Storage District [Member] Wheeler Ridge Maricopa Water Storage District [Member] Excess stock compensation (benefit) expense Effective Income Tax Rate Reconciliation, Nondeductible Expense, Share-Based Payment Arrangement, Amount Retirement Benefits [Abstract] Retirement Benefits [Abstract] Capitalized stock compensation Deferred Tax Liabilities, Capitalized Stock Compensation Deferred Tax Liabilities, Capitalized Stock Compensation 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 Farming inventories Agricultural Related Inventory, Net of Reserves Agricultural Related Inventory, Net of Reserves Average service period Defined Benefit Plan, Average Service Period Defined Benefit Plan, Average Service Period Excess joint venture distributions and other (See Note 17) 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 investment receivable Accrued Investment Income Receivable Shares withheld for taxes and tax benefit of vested shares Share-Based Payment Arrangement, Decrease for Tax Withholding Obligation Change in benefit obligation - Pension Defined Benefit Plan, Change in Benefit Obligation [Roll Forward] 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 Percentage rent Operating Lease, Lease Income, Percentage Rent Operating Lease, Lease Income, Percentage Rent Cash Equivalents Cash and Cash Equivalents, Policy [Policy 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) Total revenues Revenues Revenues Variable Interest Entity Consolidation, Variable Interest Entity, Policy [Policy Text Block] Payables and Accruals [Abstract] Payables and Accruals [Abstract] Prepaid expenses Deferred Tax Liabilities, Prepaid Expenses Product and Service [Domain] Product and Service [Domain] Federal Federal Income Tax Expense (Benefit), Continuing Operations Standby Letter of Credit Standby Letters of Credit [Member] Investing Activities Net Cash Provided by (Used in) Investing Activities [Abstract] Joint venture allocations Deferred Tax Assets, Equity Method Investments Award Type [Axis] Award Type [Axis] Restricted stock excluded from calculation of dilutive net income per share Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount Derivative Instruments and Hedging Activities Disclosure [Abstract] Derivative Instruments and Hedging Activities Disclosure [Abstract] 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 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 Plan Name [Domain] Plan Name [Domain] Tejon Ranch Commerce Center Inventory, Real Estate, Improvements, Gross Inventory, Real Estate, Improvements, Gross Fair Value Hierarchy and NAV [Domain] Fair Value Hierarchy and NAV [Domain] Auditor Attestation Flag ICFR Auditor Attestation Flag State: State and Local Income Tax Expense (Benefit), Continuing Operations [Abstract] Property and equipment, gross Property, Plant and Equipment, Gross Annual fee increase, percent 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] Employer contribution Defined Benefit Plan, Plan Assets, Contributions by Employer Use of Estimates Use of Estimates, Policy [Policy Text Block] Expected return on plan assets Defined Benefit Plan, Expected Return (Loss) on Plan Assets Derivatives, Fair Value [Line Items] Derivatives, Fair Value [Line Items] Schedule of Components of Provision (Benefit) for Income Taxes Schedule of Components of Income Tax Expense (Benefit) [Table Text Block] Entity File Number Entity File Number Schedule of Antidilutive Securities Excluded from Computation of Earnings Per Share [Table] Schedule of Antidilutive Securities Excluded from Computation of Earnings Per Share [Table] Revenues Revenue from Purchased Water Revenue from Purchased Water 2026 Long-Term Debt, Maturity, Year Three Real Estate [Abstract] Real Estate [Abstract] Current liabilities, net Increase (Decrease) in Operating Liabilities Auditor Firm ID Auditor Firm ID 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 Effective in Future Periods New Accounting Pronouncements, Policy [Policy Text Block] Segment Profits (Losses) Segment Reporting Information, Income (Loss) before Income Taxes [Abstract] 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] 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 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] Industrial Land Industrial Land [Member] Industrial Land SWP Contracts State Water Project Contracts [Member] State water project contracts. Long-Lived Assets Impairment or Disposal of Long-Lived Assets, Policy [Policy Text Block] Common stock, issued shares (in shares) Common Stock, Shares, Issued Assumptions used in determining actuarial present value of projected benefits obligation: Defined Benefit Plan, Weighted Average Assumptions Used in Calculating Benefit Obligation [Abstract] Earnings (Loss) Segment profits Gross Profit Net actuarial loss Defined Benefit Plan, Accumulated Other Comprehensive Income (Loss), Gain (Loss), before Tax 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 Los Angeles, California Los Angeles, California [Member] Los Angeles, California [Member] Long-term debt Total Long-Term Debt Common Stock Options and Grants Share-Based Payment Arrangement [Policy Text Block] Vineyards and orchards Vineyards and Orchards [Member] Vineyards and Orchards [Member] 2027 Long-Term Debt, Maturity, Year Four Accumulated other comprehensive loss Accumulated Other Comprehensive Income (Loss), Net of Tax INTEREST RATE SWAP Derivative Instruments and Hedging Activities Disclosure [Text Block] 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 gain (loss) on available-for-sale securities OCI, Debt Securities, Available-for-Sale, Gain (Loss), after Adjustment, before Tax Weighted-average recognition period of compensation cost Share-Based Payment Arrangement, Nonvested Award, Cost Not yet Recognized, Period for Recognition Pension and supplemental executive retirement plan liability Liability, Pension and Other Postretirement and Postemployment Benefits, Noncurrent Total expenses Costs and expenses Corporate expenses Commercial expenses Costs and Expenses Taxes on vested stock grants Proceeds from (Payments for) Other Financing Activities Maximum Maximum [Member] Comprehensive income attributable to common stockholders Comprehensive Income (Loss), Net of Tax, Attributable to Parent Compensation cost not yet recognized Share-Based Payment Arrangement, Nonvested Award, Cost Not yet Recognized, Amount Schedule of Interest Rate Derivatives Schedule of Interest Rate Derivatives [Table Text Block] Document Type Document Type Operating Lease, Lease Income, Statement of Income or Comprehensive Income [Extensible Enumeration] Operating Lease, Lease Income, Statement of Income or Comprehensive Income [Extensible Enumeration] Schedule of Expected Annual Benefit Payments Schedule of Expected Benefit Payments [Table Text Block] Funded status - asset (liability) Defined Benefit Plan, Funded (Unfunded) Status of Plan Entity Address, Address Line One Entity Address, Address Line One Pastoria Energy Facility, LLC PEF Pastoria Energy Facility, LLC [Member] Pastoria Energy Facility, LLC [Member] Thereafter Long-Term Debt, Maturity, after Year Five Farm Inventories Inventory, Policy [Policy Text Block] TRCC-East TRCC-East [Member] TRCC-East [Member] Non-cash retirement plan expense Pension and Other Postretirement Benefits Cost (Reversal of Cost) Antidilutive Securities, Name [Domain] Antidilutive Securities, Name [Domain] Stock compensation true-up Effective Income Tax Rate Reconciliation, Tax Exempt Income, Capitalized Stock Compensation Amount Effective Income Tax Rate Reconciliation, Tax Exempt Income, Capitalized Stock Compensation Amount Components of deferred tax assets and liabilities: Components of Deferred Tax Assets and Liabilities [Abstract] Consolidated joint venture, ownership interest Subsidiary, Ownership Percentage, Parent Current Current Federal Tax Expense (Benefit) 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 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. Audit Information [Abstract] Audit Information Total amount recorded Defined Benefit Plan, Accumulated Other Comprehensive (Income) Loss, before Tax Cost of sales allocations Deferred Tax Liabilities, Cost of Sales Allocations Deferred Tax Liabilities, Cost of Sales Allocations Customer Concentration Risk Customer Concentration Risk [Member] Deferred revenues Deferred Tax Assets, Deferred Income Deferred Deferred State and Local Income Tax Expense (Benefit) Schedule of Finite-Lived Intangible Assets Schedule of Finite-Lived Intangible Assets [Table Text Block] Variable Rate [Axis] Variable Rate [Axis] Income Statement [Abstract] Income Statement [Abstract] 2024 Lessor, Operating Lease, Payment to be Received, Year One 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] Area of land sold (in acres) Area of Real Estate Property Sold Area of Real Estate Property Sold Related Party [Domain] Related Party, Type [Domain] Cost components: Defined Benefit Plan, Net Periodic Benefit Cost (Credit) [Abstract] 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] Accrued expenses Deferred Tax Assets, Tax Deferred Expense, Reserves and Accruals, Accrued Liabilities Operating Segments Operating Segments [Member] Environmental Expenditures Environmental Costs, Policy [Policy Text Block] Income Tax Disclosure [Abstract] Income Tax Disclosure [Abstract] Income tax at statutory rate Effective Income Tax Rate Reconciliation at Federal Statutory Income Tax Rate, Amount Total water held for future use and purchased water contracts Long Term Water Assets, Contracts with Company Long Term Water Assets, Contracts with Company Weighted Average Interest Pay Rate Derivative, Fixed Interest Rate Estimated tax of change in value of available-for-sale securities OCI, Debt Securities, Available-for-Sale, Unrealized Holding Gain (Loss), before Adjustment, Tax Maturities of Long-term Debt [Abstract] Maturities of Long-Term Debt [Abstract] Share-based Payment Arrangement [Abstract] Share-Based Payment Arrangement [Abstract] Entity Tax Identification Number Entity Tax Identification Number Investment in unconsolidated joint ventures Equity Method Investments Ranch operations Ranch Operations [Member] Ranch Operations [Member] Total short-term and long-term debt Debt, Long-Term and Short-Term, Combined Amount Inventories Inventories Inventory, Net Purchase of marketable securities Payments to Acquire Marketable Securities Benefit plan adjustments Other Comprehensive (Income) Loss, Defined Benefit Plan, before Reclassification Adjustment and Tax Capitalized Share-Based Payment Arrangement, Amount Capitalized Statistical Measurement [Axis] Statistical Measurement [Axis] Land Land [Member] REAL ESTATE Real Estate Disclosure [Text Block] Balance Sheet Location [Domain] Balance Sheet Location [Domain] Financial Instrument [Axis] Financial Instrument [Axis] Other Liabilities [Abstract] Other Liabilities [Abstract] Entity Interactive Data Current Entity Interactive Data Current Debt Securities, Available-for-sale [Table] Debt Securities, Available-for-Sale [Table] Commercial lease agreements, contract terms Lessor, Operating Lease, Term of Contract Entity Common Stock Shares Outstanding Entity Common Stock, Shares Outstanding Entity Well-known Seasoned Issuer Entity Well-known Seasoned Issuer Inventory Disclosure [Abstract] Inventory Disclosure [Abstract] Total Stockholders' Equity Parent [Member] Segment [Domain] Segment [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] 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 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 Revenue Recognition Revenue from Contract with Customer [Policy Text Block] Face amount Additional bond debt authorized to be sold in future Debt Instrument, Face Amount Entity Incorporation, State or Country Code Entity Incorporation, State or Country Code Current Assets: Assets, Current [Abstract] Leases [Abstract] Leases [Abstract] Equity Method Investment, Nonconsolidated Investee [Domain] Equity Method Investment, Nonconsolidated Investee [Domain] Schedule of Components of Net Deferred Tax Assets and Liabilities Schedule of Deferred Tax Assets and Liabilities [Table Text Block] 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] Interest Rate Swap Agreements Derivatives, Policy [Policy Text Block] Schedule of Revenues from External Customers and Long-Lived Assets [Table] Schedule of Revenues from External Customers and Long-Lived Assets [Table] Operating Activities Net Cash Provided by (Used in) Operating Activities [Abstract] State deferred taxes Deferred Tax Assets, State Taxes Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items] Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items] 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 Interest cost Defined Benefit Plan, Interest Cost 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] Schedule of Future Minimum Rental Income Lessor, Operating Lease, Payment to be Received, Maturity [Table Text Block] Credit Risk Concentration Risk, Credit Risk, Policy [Policy Text Block] Auditor Location Auditor Location Defined Benefit Plan Disclosure [Line Items] Defined Benefit Plan Disclosure [Line Items] RETIREMENT PLANS Retirement Benefits [Text Block] Change in Plan Assets Defined Benefit Plan, Change in Fair Value of Plan Assets [Roll Forward] DMB Pacific LLC DMB Pacific LLC [Member] DMB Pacific LLC [Member] Interest rate swap Deferred Tax Assets, Derivative Instruments Balance Sheet Information Equity Method Investment, Summarized Financial Information [Abstract] Notes payable Notes Payable Cash and Cash Equivalents Defined Benefit Plan, Cash and Cash Equivalents [Member] Executive Vice President and Chief Operating Officer Management [Member] Distance from city Property Border, Distance to Major City Property Border, Distance to Major City Reduced outstanding amount Debt Instrument, Increase (Decrease), Net Number of directors Number Of Directors Number Of Directors State income taxes, net of Federal benefit Effective Income Tax Rate Reconciliation, State and Local Income Taxes, Amount Common stock, par value per share (in dollars per share) Common Stock, Par or Stated Value Per Share Water Water [Member] Net cash used in investing activities Net Cash Provided by (Used in) Investing Activities Interest rate swap Deferred Tax Liabilities, Derivatives Name of Major Customer [Domain] Customer [Domain] Mountain Village Tejon Mountain Village Llc [Member] Tejon mountain village llc. Schedule of Components of Inventories Schedule of Inventory, Current [Table Text Block] Revenues from External Customers and Long-Lived Assets [Line Items] Revenues from External Customers and Long-Lived Assets [Line Items] Interest Rate Swap Interest Rate Swap [Member] Estimated contribution to the pension 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 tax rate Effective Income Tax Rate Reconciliation, Percent Deferred income tax liabilities: Deferred Tax Liabilities, Gross [Abstract] Net deferred income tax (liability) Deferred Tax Assets (Liabilities), Gross Deferred Tax Assets (Liabilities), Gross Total changes Other Comprehensive (Income) Loss, Defined Benefit Plan, after Reclassification Adjustment, before Tax 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 Credit Facility [Axis] Credit Facility [Axis] Schedule of Long Lived Assets Held-for-sale [Table] Long-Lived Assets Held-for-Sale [Table] Schedule of Outstanding Indebtedness and Respective Principal Maturities Schedule of Maturities of Long-Term Debt [Table Text Block] 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 water held for future use Tangible Water Assets, Banked Water and Water Contract Rights Tangible Water Assets, Banked Water and Water Contract Rights Accumulated Other Comprehensive Loss AOCI Attributable to Parent [Member] LONG-TERM WATER ASSETS Property, Plant and Equipment Disclosure [Text Block] Property Subject to or Available for Operating Lease, by Major Property Class [Table] Property, Plant, and Equipment, Lessor Asset under Operating Lease [Table] 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 2026 Lessor, Operating Lease, Payment to be Received, Year Three Other Effective Income Tax Rate Reconciliation, Other Adjustments, Amount 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] Property, Plant and Equipment, Type [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] Business segments Number of Reportable Segments Interest rate swap settlement Proceeds from Derivative Instrument, Financing Activities Fair Values Derivatives, Balance Sheet Location, by Derivative Contract Type [Table] Fair Values Derivatives, Balance Sheet Location, by Derivative Contract Type [Table] Marketable Securities Marketable Securities, Policy [Policy Text Block] 2025 Defined Benefit Plan, Expected Future Benefit Payment, Year Two Issued and outstanding shares - 26,770,545 at December 31, 2023 and 26,541,553 at December 31, 2022 Common Stock, Value, Issued Other comprehensive income before taxes Other Comprehensive Income (Loss), before Tax 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] Current Current State and Local Tax Expense (Benefit) Long-Term Water Assets Long-term Water Assets [Policy Text Block] Long-term Water Assets [Policy Text Block] Total current assets Assets, Current Investment income Investment Income, Net Interest cost Defined Benefit Plan, Expected Interest Cost, Next Fiscal Year Defined Benefit Plan, Expected Interest Cost, Next Fiscal Year Investments in unconsolidated joint ventures Investments in and Advance to Affiliates, Subsidiaries, Associates, and Joint Ventures 2028 Lessor, Operating Lease, Payment to be Received, Year Five Schedule of Defined Benefit Plans Disclosures [Table] Schedule of Defined Benefit Plans Disclosures [Table] Total net periodic pension earnings/(cost) Defined Benefit Plan, Net Periodic Benefit Cost (Credit) Letter of credit period Letter of credit period Letter of credit period. Restricted cash (recorded in other assets) Restricted Cash Non-cash investing activities Supplemental Cash Flow Information [Abstract] Equities Defined Benefit Plan, Equity Securities [Member] Number of joint ventures Variable Interest Entity, Number of Entities Consolidated Variable Interest Entity, Number of Entities Consolidated Collective Funds Equity Funds [Member] Other (loss) income Other Nonoperating Income (Expense) Entity Filer Category Entity Filer Category Schedule of Equity Method Investments [Line Items] Schedule of Equity Method Investments [Line Items] Majestic Realty Co. Majestic Realty Co. [Member] Majestic Realty Co. [Member] Contribution to unconsolidated joint venture Contribution of property Contribution of Property Statement [Table] Statement [Table] Real estate development (includes $119,788 at December 31, 2023 and $115,221 at December 31, 2022, attributable to Centennial Founders, LLC, Note 17) Real estate development Real estate development Inventory, Real Estate, Land and Land Development Costs Current Fiscal Year End Date Current Fiscal Year End Date Commercial 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 Proceeds from sale of real estate/assets Proceeds from Sale, Real Estate, Held-for-Investment Information pretaining to assets of the business segments Segment Reporting Information, Additional Information [Abstract] Schedule of Reconciliation of Income Tax Expense from Statutory Federal Income Tax Rate Schedule of Effective Income Tax Rate Reconciliation [Table Text Block] 1998 Plan Stock Incentive Plan 1998 [Member] Stock incentive plan. December 14 2022 December 14 2022 [Member] December 14 2022 Percentage of revenue Concentration Risk, Percentage 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] Straight line rent Deferred Tax Liabilities, Straight Line Rent Deferred Tax Liabilities, Straight Line Rent SERP liability adjustments Supplemental Employee Retirement Plan [Member] Thereafter Defined Benefit Plan, Expected Future Benefit Payment, after Year Five for Next Five Years Area of building owned and leased Lease of Building Lease of building. June 16 2023, 1 June 16 2023, 1 [Member] June 16 2023, 1 Interest rate swap settlement Proceeds from derivative instrument Proceeds from Derivative Instrument, Investing Activities Recharged project water Long-term Water Assets, Recharged Project Water (Volume) Long-term Water Assets, Recharged Project Water (Volume) Stock grant expense Deferred Tax Assets, Tax Deferred Expense, Compensation and Benefits, Share-Based Compensation Cost 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 Area of land Area of Land Net (gain) loss Other Comprehensive Income (Loss), Defined Benefit Plan, Gain (Loss) Arising During Period, before Tax Investments in long-term water assets Payments to Acquire Other Investments Accrued liabilities and other Total Other Accrued Liabilities, Current Corporate expenses Corporate, Non-Segment [Member] Pension adjustment Deferred Tax Assets, Tax Deferred Expense, Compensation and Benefits, Pensions Depreciation and amortization Depreciation and Amortization Depreciation, Depletion and Amortization Deferred income tax assets: Deferred Tax Assets, Gross [Abstract] Non-cash profits recognized from land contribution Gain (Loss) on Disposition of Other Assets Stated Rate Debt Instrument, Interest Rate, Stated Percentage Bakersfield, California Bakersfield, California [Member] Bakersfield, California [Member] Term Notes Medium-term Notes [Member] Statement of Financial Position [Abstract] 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. Summary of income from commercial rents included in real estate revenue: Operating Leases, Income Statement, Lease Revenue [Abstract] State State and Local Income Tax Expense (Benefit), Continuing Operations Schedule of Finite-Lived Intangible Assets [Table] Schedule of Finite-Lived Intangible Assets [Table] Allowance for deferred tax assets Deferred Tax Assets, Valuation Allowance Restricted Stock Restricted Stock [Member] 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] Concentration Risk Type [Axis] Concentration Risk Type [Axis] Income before income taxes Income (Loss) from Continuing Operations before Income Taxes, Noncontrolling Interest Property, Plant and Equipment, Type [Axis] Long-Lived Tangible Asset [Axis] TRC-MRC 5, LLC TRC-MRC 5 LLC [Member] TRC-MRC 5 LLC Federal: Federal Income Tax Expense (Benefit), Continuing Operations [Abstract] 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 letter of credit Debt Issuance Costs, Net Expected annual benefit payments based on actuarial estimates: Defined Benefit Plan, Expected Future Benefit Payment [Abstract] 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 Other Noncurrent Assets Other Noncurrent Assets [Member] Total deferred income tax assets Deferred Tax Assets, Gross Capitalization of costs Deferred Tax Assets, Deferred Expense, Capitalized Costs Deferred Tax Assets, Deferred Expense, Capitalized Costs Effective 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 Antidilutive Securities [Axis] Antidilutive Securities [Axis] Stock compensation expense Share-Based Payment Arrangement, Noncash Expense Farming Farming Farming and Agriculture [Member] Farming and agriculture. Common Stock Common Stock [Member] Changes, net of taxes Other Comprehensive (Income) Loss, Defined Benefit Plan, after Reclassification Adjustment, after Tax Federal tax refunds received Proceeds from Income Tax Refunds 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 Abandonment expense Exploration Abandonment and Impairment Expense Vineyards and Orchards Agriculture, Policy [Policy Text Block] Product and Service [Axis] Product and Service [Axis] Schedule of Stock Grant Activity Schedule of Nonvested Share Activity [Table Text Block] Ownership percentage Equity Method Investment, Ownership Percentage Document Fiscal Year Focus Document Fiscal Year Focus Geographical [Domain] Geographical [Domain] 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] Option to extend term Long-term Water Assets, Extension Term Long-term Water Assets, Extension Term Minimum Minimum [Member] Weighted Average Number of Shares Outstanding, Diluted [Abstract] Weighted Average Number of Shares Outstanding, Diluted [Abstract] Property and equipment, net Property and equipment, net Property, Plant and Equipment, Net Distribution of earnings from unconsolidated joint ventures Proceeds from Equity Method Investment, Distribution RCL Revolving Line of Credit [Member] Revolving Line of Credit Area of real estate property (in acres) Area of Real Estate Property Finite-Lived Intangible Assets by Major Class [Axis] Finite-Lived Intangible Assets by Major Class [Axis] Investment in unconsolidated joint ventures Payments to Acquire Interest in Joint Venture Other comprehensive income Other comprehensive income (loss) Other Comprehensive Income (Loss), Net of Tax Statement of Cash Flows [Abstract] Statement of Cash Flows [Abstract] Benefit obligation at beginning of year Benefit obligation and accumulated benefit obligation at end of year Defined Benefit Plan, Benefit Obligation ASSETS Assets [Abstract] Goodwill and Intangible Assets Disclosure [Abstract] Goodwill and Intangible Assets Disclosure [Abstract] Borrowings of long-term debt Proceeds from Issuance of Long-Term Debt 2026 Defined Benefit Plan, Expected Future Benefit Payment, Year Three Tulare Lake Basin water rights Tulare Lake Basin Water Rights [Member] Tulare Lake Basin Water Rights [Member] Real Estate - resort/residential Resort and Residential Real Estate [Member] Resort and Residential Real Estate Other Deferred Tax Assets, Other Five West Parcel, LLC Five West Parcel LLC [Member] Five west parcel LLC Actuarial (gain)/loss assumption changes Defined Benefit Plan, Actuarial Gain (Loss) and Other Changes Defined Benefit Plan, Actuarial Gain (Loss) and Other Changes Net income Net 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 Centennial Founders LLC [Member] Centennial Founders LLC Retirement Plan Type [Axis] Retirement Plan Type [Axis] COMMITMENTS AND CONTINGENCIES Commitments and Contingencies Disclosure [Text Block] Commitment and Contingencies Disclosure [Line Items] Commitment and Contingencies Disclosure [Line Items] Commitment and contingencies disclosure. Commitments and Contingencies Disclosure [Table] Commitments and Contingencies Disclosure [Table] Commitments and contingencies disclosure. Thereafter Lessor, Operating Lease, Payment to be Received, after Year Five Retained Earnings Retained Earnings [Member] Current maturities of long-term debt Long-Term Debt, Current Maturities Amortization of net gain/(loss) Defined Benefit Plan, Expected Amortization of Gain (Loss), Next Fiscal Year West CFD West Community Facilities Districts [Member] West community facilities districts. Amortization of (discount) premium on 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: 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 income (loss) per share attributable to common stockholders, basic (in dollars per share) Earnings Per Share, Basic Schedule of Long-term Debt Instruments [Table] Schedule of Long-Term Debt Instruments [Table] Accounting Policies [Abstract] Accounting Policies [Abstract] Equity method investment Investment In 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, Excluding Accrued Interest, Maturities at Par Fixed Term SOFR Fixed Term SOFR [Member] Fixed Term SOFR 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 Less accumulated depreciation Inventory, Real Estate, Improvements, Accumulated Depreciation Inventory, Real Estate, Improvements, Accumulated Depreciation Weighted-average discount rate Defined Benefit Plan, Assumptions Used Calculating Benefit Obligation, Discount Rate 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) Schedule of Information Pertaining to Assets of Segments Schedule of Segment Reporting Information, by Segment [Table Text Block] Benefits paid Defined Benefit Plan, Benefit Obligation, Benefits Paid Long-term Debt, Current and Noncurrent [Abstract] Long-Term Debt, Current and Noncurrent [Abstract] Income tax payments Income Taxes Paid 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 Principles of Consolidation Consolidation, Policy [Policy Text Block] Reimbursement proceeds from Communities 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 Bank of America, N.A. BANK OF AMERICA, NATIONAL ASSOCIATION [Member] Fair Values of 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 improvement costs Additional Reimbursement Funds, Costs Reserved For Future Years Additional Reimbursement Funds, Costs Reserved For Future Years Entity Public Float Entity Public Float Line of Credit Facility, Lender [Domain] Line of Credit Facility, Lender [Domain] Marketable securities with unrecognized 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] Derivative Instrument [Axis] Derivative Instrument [Axis] Unrealized interest rate swap gain Other Comprehensive Income (Loss), Cash Flow Hedge, Gain (Loss), after Reclassification, before Tax Adjustments to reconcile net 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] 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 New Term Note New Term Note [Member] New Term Note Equity Method Investment, Nonconsolidated Investee [Axis] Equity Method Investment, Nonconsolidated Investee [Axis] Comprehensive income (loss) attributable to non-controlling interests Comprehensive Income (Loss), Net of Tax, Attributable to Noncontrolling Interest Capital Expenditures Capital Expenditures Capital Expenditures 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 Third Party Third Party [Member] Third Party Annual option payment, percent 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] Loss (gain) on sale of real estate/assets Gain (Loss) on Disposition of Property Plant Equipment, Excluding Oil and Gas Property and Timber Property Revenues Segment Reporting Information, Revenue for Reportable Segment [Abstract] Prepaid expenses and other current assets Prepaid Expense and Other Assets, Current Document Financial Statement Error Correction [Flag] Document Financial Statement Error Correction [Flag] Other changes in plan assets and benefit obligations recognized in other comprehensive income: Defined Benefit Plan, Amounts Recognized in Other Comprehensive Income (Loss) [Abstract] 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 Investments in Unconsolidated Joint Ventures Equity Method Investments [Policy Text Block] 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 2024 Long-Term Debt, Maturity, Year One Reconciliation to amounts on consolidated balance sheets: Cash and Cash Equivalents, at Carrying Value [Abstract] Related Party [Axis] Related Party, Type [Axis] Amounts recorded in stockholders’ equity Defined Benefit Plan, Accumulated Other Comprehensive (Income) Loss, before Tax [Abstract] U.S. Treasury and agency notes US Treasury and Government Short-Term Debt Securities [Member] Entity Registrant Name Entity Registrant Name Common stock equivalents-stock options, grants (in shares) Incremental Common Shares Attributable to Dilutive Effect of Share-Based Payment Arrangements Liabilities for environmental costs Accrual for Environmental Loss Contingencies Documents Incorporated by Reference Documents Incorporated by Reference [Text Block] Non-controlling interest Equity, Attributable to Noncontrolling Interest Auditor Name Auditor Name Document Period End Date Document Period End Date Profit from land sales Proceeds from Sale of Real Estate Borrowings on line of credit Proceeds from Lines of Credit Operating results from commercial 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 Less: accumulated depreciation Accumulated Depreciation, Depletion and Amortization, Property, Plant, and Equipment Revenue Revenue from Contract with Customer Benchmark [Member] Repayments of long-term debt Repayments of Long-Term Debt Entity Central Index Key Entity Central Index Key Segment Reporting Information [Line Items] Segment Reporting Information [Line Items] Total fair value of award Expensed Share-Based Payment Arrangement, Expense Share price at target achievement (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 Costs Finite-Lived Intangible Assets, Gross Income tax expense Provision for income taxes Income Tax Expense (Benefit) Oil and mineral depletion Effective Income Tax Rate Reconciliation, Nondeductible Expense, Depletion, Amount Deferred financing costs Payments of Financing Costs Profit from water sale Profit from water sales Gain (Loss) on Sale of Other Investments Award Date [Axis] Award Date [Axis] Lender Name [Axis] Lender Name [Axis] Proceeds from sale of land Proceeds from Sale, Land, Held-for-Use Marketable securities with unrecognized 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] INVENTORIES Inventory Disclosure [Text Block] Recognition of net actuarial loss Other Comprehensive Income (Loss), Defined Benefit Plan, Gain (Loss), Reclassification Adjustment from AOCI, before Tax Total revenues Revenue from Contract with Customer, Excluding Assessed Tax Amendment Flag Amendment Flag 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 2025 Lessor, Operating Lease, Payment to be Received, Year Two Difference between total income tax expense and the amount computed by applying the statutory Federal income tax rate to income before taxes: Income Tax Expense (Benefit), Effective Income Tax Rate Reconciliation, Amount [Abstract] Money Market Funds Money Market Funds [Member] Net amortization and deferral Net amortization and other 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 unrecognized 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, 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 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 Property and equipment useful life Property, Plant and Equipment, Useful Life Long-term debt, less current portion Long-Term Debt, Excluding Current Maturities Actual return on plan assets Defined Benefit Plan, Plan Assets, Increase (Decrease) for Actual Return (Loss) Net deferred taxes Deferred Tax Liabilities, Net Diluted shares outstanding (in shares) Weighted Average Number of Shares Outstanding, Diluted Borrowings 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 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 Special taxes paid Taxes, Other Major Multinational Corporation Major Multinational Corporation [Member] Major Multinational Corporation 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] Document Annual Report Document Annual Report Long term deferred profit on land contribution Deferred Gain On Contribution Of Land Deferred Gain On Contribution Of Land 2027 Defined Benefit Plan, Expected Future Benefit Payment, Year Four Balance Sheet Location [Axis] Balance Sheet Location [Axis] TOTAL ASSETS Identifiable Assets Assets Assets Equity in earnings of unconsolidated joint ventures, net Equity in earnings of unconsolidated joint ventures, net Equity in unconsolidated joint ventures, net Equity in earnings of unconsolidated joint ventures Income (Loss) from Equity Method Investments 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 2028 Long-Term Debt, Maturity, Year Five Less: current maturities of long-term debt and deferred loan costs Long-Term Debt, Current Maturities And Debt Issuance Costs Long-Term Debt, Current Maturities And Debt Issuance Costs Cost Debt Securities, Available-for-Sale, Amortized Cost, Excluding Accrued Interest, before Allowance for Credit Loss Construction loan Construction Loan OTHER LIABILITIES Other Liabilities Disclosure [Text Block] 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 Other liabilities Other liabilities Other Liabilities, Noncurrent Accrued paid personal leave Accrued Paid Personal Leave, Current Accrued Paid Personal Leave, Current Deferred revenue Revenue, Remaining Performance Obligation, Amount Development in process Construction in Progress [Member] Book deferred gains Deferred Tax Assets, Book Deferred Gains Deferred Tax Assets, Book Deferred Gains Defined Benefit Plan, Plan Assets, Category [Domain] Defined Benefit Plan, Plan Assets, Category [Domain] Components of provision (benefit) for income taxes: Income Tax Expense (Benefit), Continuing Operations, by Jurisdiction [Abstract] Benefit plan adjustments Pension Liability Pension Plan Pension Plan [Member] REPORTING SEGMENTS AND RELATED INFORMATION Segment Reporting Disclosure [Text Block] (Decrease) increase in cash, cash equivalents, and restricted cash 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 expense Income (Loss) from Continuing Operations before Equity Method Investments, Income Taxes, Noncontrolling Interest Equity Component [Domain] Equity Component [Domain] 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] Other Deferred Tax Liabilities, Other Debt Instrument [Line Items] Debt Instrument [Line Items] Inventories consist of: Inventory, Net, Items Net of Reserve Alternative [Abstract] Common stock (in shares) Weighted Average Number of Shares Outstanding, Basic TRCC West TRCC West [Member] TRCC West Entity Current Reporting Status Entity Current Reporting Status NDSI Plan Non-Employee Director Stock Incentive Plan [Member] Non-employee director stock incentive plan. Concentration Risk Type [Domain] Concentration Risk Type [Domain] Operating (loss) income Operating Income (Loss) Depreciation Deferred Tax Liabilities, Property, Plant and Equipment 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] Concentration Risk Benchmark [Axis] Concentration Risk Benchmark [Axis] Transferable water Long-term Water Assets, Transferrable Water (Volume) Long-term Water Assets, Transferrable Water (Volume) Rate of increase in periodic pension costs Defined Benefit Plan, Assumptions Used Calculating Net Periodic Benefit Cost, Rate of Compensation Increase 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. Revenues: Revenues [Abstract] Total deferred income tax liabilities Deferred Tax Liabilities, Gross Non-deductible compensation Income Tax Reconciliation, Nondeductible Expense, Compensation Income Tax Reconciliation, Nondeductible Expense, Compensation Consolidated Entities [Domain] Consolidated Entities [Domain] December 11,2020 December 11,2020 [Member] December 11,2020 Future minimum rental income on commercial, communication and right-of-way leases: Operating Leases, Future Minimum Payments Receivable [Abstract] 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) Base rent Operating Lease, Lease Income Related Party Transaction [Axis] Related Party Transaction [Axis] Business Segments [Axis] Segments [Axis] Statement [Line Items] Statement [Line Items] Estimated Fair Value Estimate of Fair Value Measurement [Member] Concentration Risk [Table] Concentration Risk [Table] Property and Equipment Property, Plant and Equipment, Policy [Policy Text Block] Other comprehensive income (loss): 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 RLC outstanding balance Bond debt sold by TRPFFA 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] Non-controlling Interest Noncontrolling Interest [Member] Percentage of rentable space occupied 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.