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Liability, to be Paid, Year Five Anti-dilutive potential securities (in shares) Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount Number of votes for each member Number of Votes, Each Member of Company Number of Votes, Each Member of Company Tax Receivable Agreement Tax Receivable Agreement [Text Block] Tax Receivable Agreement [Text Block] Entity Ex Transition Period Entity Ex Transition Period Short-term lease cost Short-term Lease, Cost OTHER COMPREHENSIVE INCOME: Other Comprehensive Income (Loss), before Tax [Abstract] Equity Component [Domain] Equity Component [Domain] Add equity in earnings (losses) from unconsolidated entities Equity Method Investment, Summarized Financial Information [Abstract] LIABILITIES: Liabilities [Abstract] Percentage of distributions entitled to receive Business Acquisition, Right of Distributions, Percentage Business Acquisition, Right of Distributions, Percentage PROPERTIES AND EQUIPMENT, NET Carrying value of property Property, Plant and Equipment, Net Entity Tax Identification Number Entity Tax Identification Number Lessee, Lease, Description [Table] Lessee, Lease, Description [Table] Share-Based Compensation Share-based Payment Arrangement [Text Block] NET INCOME (LOSS) ATTRIBUTABLE TO THE COMPANY The Company’s share of net (loss) income Net income (loss) attributable to the Company Net Income (Loss) Attributable to Parent Payable pursuant to tax receivable agreement Payable pursuant to tax receivable agreement Tax Receivable Agreement, Liability, Noncurrent Tax Receivable Agreement, Liability, Noncurrent WEIGHTED AVERAGE SHARES OUTSTANDING Earnings Per Share, Basic, Other Disclosures [Abstract] 2020 (excluding the nine months ended September 30, 2020) Lessee, Operating Lease, Liability, to be Paid, Remainder of Fiscal Year Schedule of Variable Interest Entities [Table] Schedule of Variable Interest Entities [Table] Changes in operating assets and liabilities: Increase (Decrease) in Operating Assets [Abstract] Investment, Name [Domain] Investment, Name [Domain] OTHER COMPREHENSIVE INCOME—Net of tax Other comprehensive income—net of tax Other Comprehensive Income (Loss), Net of Tax Payable To Holders Of Management Company's Class B Interests Payable To Holders Of Management Company's Class B Interests [Member] Payable To Holders Of Management Company's Class B Interests [Member] Class A Units Capital Unit, Class A [Member] Leases [Abstract] Leases [Abstract] Long-term Debt, Type [Axis] Long-term Debt, Type [Axis] Current Fiscal Year End Date Current Fiscal Year End Date Capitalized Contract Cost [Table] Capitalized Contract Cost [Table] LESS COMPREHENSIVE INCOME (LOSS) ATTRIBUTABLE TO NONCONTROLLING INTERESTS Comprehensive Income (Loss), Net of Tax, Attributable to Noncontrolling Interest NET INCOME (LOSS) ATTRIBUTABLE TO THE COMPANY PER CLASS A SHARE Earnings Per Share [Abstract] Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items] Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items] Average annual absorption of homesites (market rate homesites) Absorption Of Homesites Absorption Of Homesites Miscellaneous Total miscellaneous other income Other Nonoperating Income Disposal Group Name [Domain] Disposal Group Name [Domain] CAPITAL: Stockholders' Equity Attributable to Parent [Abstract] Accumulated Other Comprehensive Income (Loss) [Line Items] Accumulated Other Comprehensive Income (Loss) [Line Items] Great Park Great Park Venture Great Park Venture [Member] Great Park Venture [Member] Document Fiscal Period Focus Document Fiscal Period Focus Number of individuals entitled to be appointed to executive committee Equity Method Investments, Number of Governing Individuals Equity Method Investments, Number of Governing Individuals Parent Company Parent Company [Member] Numerator for diluted net loss available to Class A/B common shareholders Net Income (Loss) Available to Common Stockholders, Diluted Contribution made Defined Benefit Plan, Plan Assets, Contributions by Employer SUPPLEMENTAL CASH FLOW INFORMATION: Supplemental Cash Flow Information [Abstract] Business Acquisition, Acquiree [Domain] Business Acquisition, Acquiree [Domain] Entity Filer Category Entity Filer Category Common Stock Common Stock [Member] Product and Service [Domain] Product and Service [Domain] Return of investment from Gateway Commercial Venture Proceeds from Equity Method Investment, Distribution, Return of Capital Contribution from noncontrolling interest and related sale of Class B common shares Noncontrolling Interest, Contribution From Sale Of Equity Noncontrolling Interest, Contribution From Sale Of Equity Related party liabilities Due to related parties Due to Related Parties Senior unsecured revolving credit facility, available borrowing capacity Line of Credit Facility, Remaining Borrowing Capacity Issuance of Class C common shares (in shares) Stock Issued During Period, Shares, New Issues INCOME TAX PROVISION RELATED TO OTHER COMPREHENSIVE INCOME Other comprehensive income, tax Other Comprehensive Income (Loss), Tax Gross carrying amount Finite-Lived Intangible Assets, Gross Accrued financing costs Financing Costs Incurred But Not Yet Paid Financing Costs Incurred But Not Yet Paid Schedule of Equity Method Investments [Line Items] Schedule of Equity Method Investments [Line Items] Interest rate on new notes Debt Instrument, Interest Rate, Stated Percentage Related party liabilities Variable Interest Entity, Consolidated, Carrying Amount, Related Party Liabilities Variable Interest Entity, Consolidated, Carrying Amount, Related Party Liabilities Common Class A Class A Common Shares Common Class A [Member] Schedule of Related Party Transactions Schedule of Related Party Transactions [Table Text Block] NONCASH INVESTING AND FINANCING ACTIVITIES: Noncash Investing and Financing Items [Abstract] Diluted income (loss) per share: Earnings Per Share, Diluted [Abstract] Operating properties Operating properties Operating Properties [Member] Operating Properties [Member] Related Party Transactions [Abstract] Related Party Transactions [Abstract] NET DECREASE IN CASH, CASH EQUIVALENTS, AND RESTRICTED CASH Cash, Cash Equivalents, Restricted Cash and Restricted Cash Equivalents, Period Increase (Decrease), Including Exchange Rate Effect Total other income Nonoperating Income (Expense) Operating Lease Maturities after adoption of Topic 842 Lessee, Operating Lease, Liability, Maturity [Table Text Block] Performance Restricted Stock Units (RSUs) Performance Restricted Stock Units (RSUs) [Member] Performance Restricted Stock Units (RSUs) [Member] Unaudited Interim Financial Information Basis of Accounting, Policy [Policy Text Block] Basic (in shares) Basic weighted average Class A/B common shares outstanding (in shares) Weighted Average Number of Shares Outstanding, Basic COSTS AND EXPENSES: Costs and Expenses [Abstract] Ownership [Axis] Ownership [Axis] Reimbursement payments, due in year five Long-Term Debt, Maturity, Year Five Ownership [Domain] Ownership [Domain] Carrying Value Reported Value Measurement [Member] Revenues Revenue from Contract with Customer [Text Block] Percentage of equity ownership Equity Method Investment, Ownership Percentage Proceeds from issuance of redeemable noncontrolling interest Proceeds from Issuance of Redeemable Preferred Stock Capital including portion attributable to noncontrolling interest, beginning balance Capital including portion attributable to noncontrolling interest, ending balance Stockholders' Equity, Including Portion Attributable to Noncontrolling Interest Business and Organization Organization, Consolidation and Presentation of Financial Statements Disclosure [Text Block] Reclassification of actuarial loss on defined benefit pension plan included in net income (loss) Other Comprehensive Income (Loss), Defined Benefit Plan, Gain (Loss), Reclassification Adjustment from AOCI, before Tax Revenues Revenues Revenues Class of Stock [Axis] Class of Stock [Axis] INCOME TAX (PROVISION) BENEFIT Deferred income taxes Provision for income tax Income Tax Expense (Benefit) CASH, CASH EQUIVALENTS, AND RESTRICTED CASH—Beginning of period CASH, CASH EQUIVALENTS, AND RESTRICTED CASH—End of period Total cash, cash equivalents, and restricted cash shown in the condensed consolidated statements of cash flows Cash, Cash Equivalents, Restricted Cash and Restricted Cash Equivalents Capital Units by Class [Axis] Capital Units by Class [Axis] AOCI Attributable to Noncontrolling Interest AOCI Attributable to Noncontrolling Interest [Member] Gain on asset sales, net Equity Method Investment, Realized Gain (Loss) on Disposal Diluted (in dollar per share) Class A/B common shares (in dollars per share) Earnings Per Share, Diluted Variable Interest Entity [Line Items] Variable Interest Entity [Line Items] Local Phone Number Local Phone Number Cumulative Effect, Period of Adoption [Domain] Cumulative Effect, Period of Adoption [Domain] Schedule of Stock by Class [Table] Schedule of Stock by Class [Table] Noncontrolling Interest [Line Items] Noncontrolling Interest [Line Items] Promissory note issued Long-term Debt, Gross Schedule of Long-term Debt Instruments Schedule of Long-term Debt Instruments [Table Text Block] Entity Address, Address Line One Entity Address, Address Line One Third Parties Third Parties [Member] Third Parties Entity Address, Address Line Two Entity Address, Address Line Two Related Party Transaction [Domain] Related Party Transaction [Domain] Other assets Increase (Decrease) in Other Operating Assets Entity Emerging Growth Company Entity Emerging Growth Company Total Related Party Assets Related Party Assets Related Party Assets Senior unsecured revolving credit facility, maximum borrowing capacity Line of Credit Facility, Maximum Borrowing Capacity Holding period for right to exchange Noncontrolling Interest, Stockholders Right To Exchange, Holding Period Stockholders Right To Exchange, Holding Period Award Type [Axis] Award Type [Axis] Weighted- Average Grant Date Fair Value Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Weighted Average Grant Date Fair Value [Abstract] Accumulated amortization Finite-Lived Intangible Assets, Accumulated Amortization Maximum Maximum [Member] Noncontrolling Interests Noncontrolling Interest [Member] Cash paid for interest, all of which was capitalized to inventories Interest Paid, Capitalized, Operating Activities Interest Paid, Capitalized, Operating Activities Retained Earnings Retained Earnings [Member] Measurement Basis [Axis] Measurement Basis [Axis] Schedule of Net Benefit Costs Schedule of Net Benefit Costs [Table Text Block] Basis of Presentation Significant Accounting Policies [Text Block] Net cash provided by investing activities Net Cash Provided by (Used in) Investing Activities Schedule of Share-based Compensation Arrangements by Share-based Payment Award [Table] Schedule of Share-based Compensation Arrangements by Share-based Payment Award [Table] Award Type [Domain] Award Type [Domain] Five Point Land, LLC Five Point Land, LLC [Member] Five Point Land, LLC [Member] Trading Symbol Trading Symbol Accumulated Other Comprehensive Income (Loss) [Table] Accumulated Other Comprehensive Income (Loss) [Table] Fair Value, by Balance Sheet Grouping [Table] Fair Value, by Balance Sheet Grouping [Table] Contract assets, beginning balance Contract assets, ending balance Contract assets Contract with Customer, Asset, after Allowance for Credit Loss Earnings Per Share Earnings Per Share [Text Block] Notes payable Notes Payable, Fair Value Disclosure Organization, Consolidation and Presentation of Financial Statements [Abstract] Organization, Consolidation and Presentation of Financial Statements [Abstract] REDEEMABLE NONCONTROLLING INTEREST Redeemable Noncontrolling Interest, Equity, Carrying Amount CASH FLOWS FROM FINANCING ACTIVITIES: Net Cash Provided by (Used in) Financing Activities, Continuing Operations [Abstract] Entity Shell Company Entity Shell Company Segment Reporting Information [Line Items] Segment Reporting Information [Line Items] Reacquisition of share-based compensation awards for tax-withholding purposes (in shares) Share-based Payment Arrangement, Shares Withheld for Tax Withholding Obligation Recent Accounting Pronouncements New Accounting Pronouncements, Policy [Policy Text Block] Statement of Financial Position [Abstract] Statement of Financial Position [Abstract] Basic income (loss) per share: Earnings Per Share, Basic [Abstract]