Statement of Financial Position [Abstract] Preferred stock, par value (in dollars per share) Preferred Stock, Par or Stated Value Per Share Preferred stock, shares authorized (in shares) Preferred Stock, Shares Authorized Preferred stock, shares issued (in shares) Preferred Stock, Shares Issued Common stock, par value (in dollars per share) Common Stock, Par or Stated Value Per Share Common stock, shares authorized (in shares) Common Stock, Shares Authorized Common stock, shares issued (in shares) Common Stock, Shares, Issued Common stock, shares outstanding (in shares) Common Stock, Shares, Outstanding Treasury stock, shares held (in shares) Treasury Stock, Shares Income Tax Disclosure [Abstract] INCOME TAXES Income Tax Disclosure [Text Block] Earnings Per Share [Abstract] Summary of EPS calculations Schedule of Earnings Per Share, Basic and Diluted [Table Text Block] Statement of Comprehensive Income [Abstract] Net (loss) income Net Income (Loss), Including Portion Attributable to Noncontrolling Interest Other comprehensive income (loss): Other Comprehensive Income (Loss), Net of Tax [Abstract] Interest rate swaps Other Comprehensive Income (Loss), Derivatives Qualifying as Hedges, Net of Tax Capitalized swap interest expense Other Comprehensive Income Loss Capitalized Swap Interest Net Of Tax Settled derivative gains and losses, net of tax, associated with hedged variable debt for which the underlying interest is capitalizable. Pension adjustment Other Comprehensive (Income) Loss, Defined Benefit Plan, Reclassification Adjustment from AOCI, after Tax Adoption of ASU 2018-02 Tax Cuts and Jobs Act Of 2017, Reclassification From AOCI To Retained Earnings, Tax Effect Tax Cuts and Jobs Act Of 2017, Reclassification From AOCI To Retained Earnings, Tax Effect Adoption of ASU 2017-12 New Accounting Pronouncement Or Change In Accounting Principle, Effect Of Change On Other Comprehensive Income New Accounting Pronouncement Or Change In Accounting Principle, Effect Of Change On Other Comprehensive Income Terminated swap amortization Other Comprehensive Income (Loss), Derivative, Terminated Swap Amortization Other Comprehensive Income (Loss), Derivative, Terminated Swap Amortization Other comprehensive income (loss) Other Comprehensive Income, Other, Net of Tax Comprehensive (loss) income Comprehensive Income (Loss), Net of Tax, Including Portion Attributable to Noncontrolling Interest Comprehensive loss attributable to noncontrolling interests Comprehensive Income (Loss), Net of Tax, Attributable to Noncontrolling Interest Comprehensive (loss) income attributable to common stockholders Comprehensive Income (Loss), Net of Tax, Attributable to Parent Interest rate swaps, deferred tax expense Other Comprehensive Income (Loss), Derivatives Qualifying as Hedges, Tax Capitalized swap interest income, deferred tax benefit Other Comprehensive Income Loss Capitalized Swap Interest Tax Tax effect of settled derivative gains and losses, associated with hedged variable debt for which the underlying interest is capitalizable. Pension deferred tax benefit Other Comprehensive (Income) Loss, Defined Benefit Plan, after Reclassification Adjustment, Tax Assets: Assets [Abstract] Investment in real estate: Real Estate Investments, Net [Abstract] Master Planned Communities assets Real Estate Investments, Other Buildings and equipment Property, Plant and Equipment, Gross Less: accumulated depreciation Accumulated Depreciation, Depletion and Amortization, Property, Plant, and Equipment Land Land Developments Development in Process Net property and equipment Property, Plant and Equipment, Net Investment in real estate and other affiliates Investments in and Advance to Affiliates, Subsidiaries, Associates, and Joint Ventures Net investment in real estate Real Estate Investment Property, Net Cash and cash equivalents Cash and Cash Equivalents, at Carrying Value Restricted cash Restricted Cash Accounts receivable, net Accounts Receivable, Net Municipal Utility District receivables, net Municipal Utility District Receivables For unclassified balance sheet, amounts due from municipal Utility district in the normal course of business includes principal and interest amounts. Notes receivable, net Financing Receivable, Net Deferred expenses, net Deferred Costs Prepaid expenses and other assets, net Prepaid Expense and Other Assets Total assets Assets Liabilities: Liabilities [Abstract] Mortgages, notes and loans payable, net Notes and Loans Payable Deferred tax liabilities Deferred Income Tax Liabilities, Net Accounts payable and accrued expenses Accounts Payable and Accrued Liabilities Total liabilities Liabilities Commitments and contingencies (see Note 10) Commitments and Contingencies Equity: Stockholders' Equity, Including Portion Attributable to Noncontrolling Interest [Abstract] Preferred stock: $.01 par value; 50,000,000 shares authorized, none issued Preferred Stock, Value, Outstanding Common stock: $.01 par value; 150,000,000 shares authorized, 43,545,778 shares issued and 43,040,485 outstanding as of June 30, 2018 and 43,300,253 shares issued and 43,270,880 outstanding as of December 31, 2017 Common Stock, Value, Issued Additional paid-in capital Additional Paid in Capital, Common Stock Accumulated deficit Retained Earnings (Accumulated Deficit) Accumulated other comprehensive income (loss) Accumulated Other Comprehensive Income (Loss), Net of Tax Treasury stock, at cost, 505,293 and 29,373 shares as of June 30, 2018 and December 31, 2017, respectively Treasury Stock, Value Total Stockholders' equity Stockholders' Equity Attributable to Parent Noncontrolling interests Stockholders' Equity Attributable to Noncontrolling Interest Total equity Stockholders' Equity, Including Portion Attributable to Noncontrolling Interest Total liabilities and equity Liabilities and Equity Stockholders' Equity Note [Abstract] Reclassification out of Accumulated Other Comprehensive Income [Table] Reclassification out of Accumulated Other Comprehensive Income [Table] Equity Components [Axis] Equity Components [Axis] Equity Component [Domain] Equity Component [Domain] Losses on cash flow hedges Accumulated Net Gain (Loss) from Cash Flow Hedges Including Portion Attributable to Noncontrolling Interest [Member] Derivative Instrument [Axis] Derivative Instrument [Axis] Derivative Contract [Domain] Derivative Contract [Domain] Interest rate swap contracts Interest Rate Swap [Member] Reclassification out of Accumulated Other Comprehensive Income [Axis] Reclassification out of Accumulated Other Comprehensive Income [Axis] Reclassification out of Accumulated Other Comprehensive Income [Domain] Reclassification out of Accumulated Other Comprehensive Income [Domain] Reclassification out of Accumulated Other Comprehensive Income Reclassification out of Accumulated Other Comprehensive Income [Member] Income Statement Location [Axis] Income Statement Location [Axis] Income Statement Location [Domain] Income Statement Location [Domain] Interest Expense Interest Expense [Member] Provision For Income Taxes Provision For Income Taxes [Member] Primary financial statement caption encompassing provision for income taxes. Reclassifications out of accumulated other comprehensive income (loss) Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items] Loss (gain) reclassified from accumulated other comprehensive loss to net income (loss) Reclassification from Accumulated Other Comprehensive Income, Current Period, Net of Tax Basic EPS: Earnings Per Share, Basic [Abstract] Numerator: Net Income (Loss) Available to Common Stockholders, Basic [Abstract] Net loss attributable to noncontrolling interests Net Income (Loss) Attributable to Noncontrolling Interest Net (loss) income attributable to common stockholders Net Income (Loss) Available to Common Stockholders, Basic Denominator: Weighted Average Number of Shares Outstanding, Basic [Abstract] Weighted average basic common shares outstanding (in shares) Weighted Average Number of Shares Outstanding, Basic Diluted EPS: Earnings Per Share, Diluted [Abstract] Numerator: Net Income (Loss) Available to Common Stockholders, Diluted [Abstract] Net income attributable to common stockholders Denominator: Weighted Average Number of Shares Outstanding, Diluted [Abstract] Restricted stock and stock options (in shares) Incremental Common Shares Attributable to Dilutive Effect of Share-based Payment Arrangements Warrants (in shares) Incremental Common Shares Attributable to Dilutive Effect of Call Options and Warrants Weighted average diluted common shares outstanding (in shares) Weighted Average Number of Shares Outstanding, Diluted Basic income per share: (in dollars per share) Earnings Per Share, Basic Diluted income per share: (in dollars per share) Earnings Per Share, Diluted Income Statement [Abstract] Statement [Table] Statement [Table] Products and Services [Axis] Products and Services [Axis] Products and Services [Domain] Products and Services [Domain] Condominium rights and unit sales Condominium Rights And Unit Sales [Member] Condominium Rights And Unit Sales [Member] Master Planned Communities land sales Master Planned Community Land Sales [Member] Master Planned Community Land Sales [Member] Hospitality revenues Hospitality Revenue [Member] Hospitality Revenue [Member] Builder price participation Builder Price Participation [Member] Builder Price Participation [Member] Other land revenues Other Land Revenue [Member] Other Land Revenue [Member] Other rental and property revenues Other Rental And Property Revenues [Member] Other Rental And Property Revenues [Member] Statement [Line Items] Statement [Line Items] Revenues: Revenues [Abstract] Revenue from contract with customer Revenue from Contract with Customer, Including Assessed Tax Minimum rents Operating Leases, Income Statement, Minimum Lease Revenue Tenant recoveries Tenant Reimbursements Total revenues Revenues Expenses: Costs and Expenses [Abstract] Condominium rights and unit cost of sales Condominium Rights And Unit Cost Of Sales Represents costs incurred directly related to generating condominium unit sales revenue. Master Planned Communities cost of sales Cost of Real Estate Sales Master Planned Communities operations Costs of Real Estate Services and Land Sales Other property operating costs Other Cost and Expense, Operating Rental property real estate taxes Real Estate Tax Expense Rental property maintenance costs Cost of Property Repairs and Maintenance Hospitality operating costs Hospitality Expenses Represents the information pertaining to hospitality expenses. Provision for doubtful accounts Provision for Doubtful Accounts Demolition costs Demolition Costs Represents expenses related to demolition of real estate properties. Development-related marketing costs Marketing Expense General and administrative General and Administrative Expense Depreciation and amortization Depreciation, Depletion and Amortization, Nonproduction Total expenses Operating Expenses Operating (loss) income before other items Operating Income Loss Before Other Items The net result for the period of deducting operating expenses from operating revenues but before other operating items. Other: Other Income and Expenses [Abstract] Gains on sales of properties Gain (Loss) on Sale of Properties, before Applicable Income Taxes Other income, net Other Operating Income Loss The total amount of other operating income (loss). The components are not separately disclosed on the income statement. Total other Other Operating Income (Expense), Net Operating (loss) income Operating Income (Loss) Interest income Investment Income, Interest Interest expense Interest Expense Loss on redemption of senior notes due 2021 Gain (Loss) on Extinguishment of Debt Warrant liability loss Fair Value Adjustment of Warrants Gain on acquisition of joint venture partner's interest Gain Loss On Acquisition Of Joint Venture Partners Interest Gain (loss) from the acquisition of joint venture partner's interest. Equity in earnings from real estate and other affiliates Income (Loss) from Equity Method Investments (Loss) income before taxes Income (Loss) from Continuing Operations before Income Taxes, Noncontrolling Interest (Benefit) provision for income taxes Income Tax Expense (Benefit) Net (loss) income Commitments and Contingencies Disclosure [Abstract] Schedule of Operating Leased Assets [Table] Schedule of Operating Leased Assets [Table] Loss Contingency Nature [Axis] Loss Contingency Nature [Axis] Loss Contingency, Nature [Domain] Loss Contingency, Nature [Domain] Guarantee Obligations Guarantee Obligations [Member] Name of Property [Axis] Name of Property [Axis] Name of Property [Domain] Name of Property [Domain] Downtown Columbia Downtown Columbia [Member] Represents information pertaining to Downtown Columbia. Commitments Operating Leased Assets [Line Items] Outstanding letters of credit Letters of Credit Outstanding, Amount Amount of outstanding surety bonds Surety Bonds Outstanding Amount The total amount of the contingent obligation under surety bonds outstanding as of the reporting date. Rent expense Operating Leases, Rent Expense Loss contingency guaranteed amount limit Loss Contingency Guaranteed Amount The amount of guarantee given for bond issue. Derivative Instruments and Hedging Activities Disclosure [Abstract] Summary of fair value of the Company's derivative financial instruments Schedule of Derivative Instruments in Statement of Financial Position, Fair Value [Table Text Block] Summary of effect of the Company's derivative financial instruments on the Condensed Consolidated Statements of Operations Derivative Instruments, Gain (Loss) [Table Text Block] Debt Disclosure [Abstract] Schedule of Long-term Debt Instruments [Table] Schedule of Long-term Debt Instruments [Table] Short-term Debt, Type [Axis] Short-term Debt, Type [Axis] Short-term Debt, Type [Domain] Short-term Debt, Type [Domain] Notes Payable, Other Payables Notes Payable, Other Payables [Member] Subsequent Event Type [Axis] Subsequent Event Type [Axis] Subsequent Event Type [Domain] Subsequent Event Type [Domain] Subsequent Event Subsequent Event [Member] Segments [Axis] Segments [Axis] Segments [Domain] Segments [Domain] MPC Master Planned Communities [Member] Represents the Master Planned Communities, a reportable segment of the entity. It includes the development and sale of land, in large-scale, long-term community development projects in and around Las Vegas, Nevada; Houston, Texas and Columbia, Maryland. Summerlin Summerlin [Member] Represents the information pertaining to Summerlin Acquisition properties owned by the entity. Bridgeland Apartments Bridgeland Apartments [Member] Bridgeland Apartments [Member] Summerlin Ballpark Summerlin Ballpark [Member] Summerlin Ballpark [Member] 250 Water Street 250 Water Street [Member] 250 Water Street [Member] Wacker110 N Wacker110 N [Member] Represents the information pertaining to 110 N. Wacker, a property owned by the entity. Lakeland Village Center Lakeland Village Center [Member] Lakeland Village Center [Member] Downtown Summerlin Apartments Downtown Summerlin Apartments [Member] Represents the information pertaining to downtown summerlin apartments, Las Vegas, NV Lake Woodlands Crossing Retail Lake Woodlands Crossing Retail [Member] It represent lake woodlands Crossing retail. Three Hughes Landing Three Hughes Landing [Member] Represents information pertaining to Three Hughes Landing, a property owned by the entity. Debt Instrument [Axis] Debt Instrument [Axis] Debt Instrument, Name [Domain] Debt Instrument, Name [Domain] Special Improvement District bonds Bonds [Member] Long-term Debt, Type [Axis] Long-term Debt, Type [Axis] Long-term Debt, Type [Domain] Long-term Debt, Type [Domain] Construction Loans Construction Loans [Member] Variable Rate [Axis] Variable Rate [Axis] Variable Rate [Domain] Variable Rate [Domain] London Interbank Offered Rate (LIBOR) London Interbank Offered Rate (LIBOR) [Member] One Month LIBOR London Interbank Offered Rate One Month Libor [Member] The one-month interest rate at which a bank borrows funds from other banks in the London interbank market. Mortgages, notes and loans payable Debt Instrument [Line Items] Land, buildings and equipment and developments in progress pledged as collateral Pledged Assets, Other, Not Separately Reported on Statement of Financial Position New SIDs issued Secured Debt Bond obligation Bond Obligation Liabilities Assumed By Buyers The fair value of bond obligation liabilities assumed in by buyers. Loan amount Debt Instrument, Face Amount Number of extension options Debt Instrument, Number of Extension Options Represents the number of extension options available pertaining to a debt instrument. Term of extension option Debt Instrument, Extension Option, Term Debt Instrument, Extension Option, Term Interest rate margin (as a percent) Debt Instrument, Basis Spread on Variable Rate Note payable to acquire land Short-term Debt Area of land purchased Area Of Land Purchased Area Of Land Purchased Interest free term Debt Instrument, Interest Free Term Debt Instrument, Interest Free Term Interest rate (as a percent) Debt Instrument, Interest Rate, Stated Percentage Minimum paydown for term extension Debt Instrument, Extension Option, Minimum Paydown Debt Instrument, Extension Option, Minimum Paydown Joint venture debt guaranteed Variable Interest Entity, Consolidated, Joint Venture Debt, Guarantee Amount Variable Interest Entity, Consolidated, Joint Venture Debt, Guarantee Amount Repayments on mortgage loan Repayments of Long-term Debt Maximum recourse percentage upon achievement of conditions Debt Instrument, Maximum Recourse Percentage, Upon Achievement Of Conditions Represents the maximum percentage recourse the loan has with the Company upon achievement of conditions. Recourse percentage Debt Instrument, Recourse Percentage Represents the percentage of recourse related to debt instrument. Occupancy percentage Percentage Of Occupancy Of Real Estate Property Represents the percentage of occupancy by the tenants of the real estate property. Settlement of swap liability Derivative Liability, Fair Value, Gross Liability Long-term line of credit Long-term Line of Credit Fair Values Derivatives, Balance Sheet Location, by Derivative Contract Type [Table] Fair Values Derivatives, Balance Sheet Location, by Derivative Contract Type [Table] Range [Axis] Range [Axis] Range [Domain] Range [Domain] Minimum Minimum [Member] Maximum Maximum [Member] Interest Rate Swap Interest Rate Cap Interest Rate Cap [Member] Interest Rate Collar Interest Rate Collar [Member] Interest Rate Collar [Member] Hedging Designation [Axis] Hedging Designation [Axis] Hedging Designation [Domain] Hedging Designation [Domain] Designated as Hedging Instrument Designated as Hedging Instrument [Member] Not Designated as Hedging Instrument, Economic Hedge Not Designated as Hedging Instrument, Economic Hedge [Member] Balance Sheet Location [Axis] Balance Sheet Location [Axis] Balance Sheet Location [Domain] Balance Sheet Location [Domain] Accounts payable and accrued expenses Accounts Payable and Accrued Liabilities [Member] Prepaid expenses and other assets, net Prepaid Expenses and Other Current Assets [Member] Derivative Instrument, Interest Rate and Maturity Date [Axis] Derivative Instrument, Interest Rate and Maturity Date [Axis] Derivative Instrument, Interest Rate and Maturity Date [Axis] Derivative Instrument, Interest Rate and Maturity Date [Domain] Derivative Instrument Interest Rate And Maturity Date [Domain] Derivative Instrument, Interest Rate and Maturity Date [Domain] Fixed Interest Rate 2.96%, Maturing October 2019 Fixed Interest Rate2.96 Maturing October2019 [Member] Fixed Interest Rate 2.96%, Maturing October 2019 [Member] Fixed Interest Rate 1.66%, Maturing May 2020 Fixed Interest Rate1.66 Maturing May2020 [Member] Fixed Interest Rate 1.66%, Maturing May 2020 [Member] Fixed Interest Rate 1.14%, Maturing September 2021 Fixed Interest Rate1.14 Maturing September2021 [Member] Fixed Interest Rate 1.14%, Maturing September 2021 [Member] Fixed Interest Rate5.00 Maturing August2019 Fixed Interest Rate5.00 Maturing August2019 [Member] Fixed interest rate 5.00%, Maturing August 2019 [Member] Fixed Interest Rate 2.50%, Maturing December 2019 Fixed Interest Rate2.50 Maturing December2019 [Member] Fixed Interest Rate 2.50%, Maturing December 2019 [Member] Fixed Interest Rate 2.65%, Maturing December 2027 Fixed Interest Rate2.65 Maturing December2027 [Member] Fixed Interest Rate 2.65%, Maturing December 2027 [Member] Fixed Interest Rate 2.68%, Maturing December 2027 Fixed Interest Rate2.68 Maturing December2027 [Member] Fixed Interest Rate 2.68%, Maturing December 2027 [Member] Fixed Interest Rate 2.62%, Maturing December 2027 Fixed Interest Rate2.62 Maturing December2027 [Member] Fixed Interest Rate 2.62%, Maturing December 2027 [Member] Fixed Interest Rate 1.50% To 2.50%, Maturing May 2019 Fixed Interest Rate 1.50% To 2.50%, Maturing May 2019 [Member] Fixed Interest Rate 1.50% To 2.50%, Maturing May 2019 [Member] Fixed Interest Rate 2.00% To 3.00%, Maturing May 2020 Fixed Interest Rate 2.00% To 3.00%, Maturing May 2020 [Member] Fixed Interest Rate 2.00% To 3.00%, Maturing May 2020 [Member] Fixed Interest Rate 2.25% To 3.25%, Maturing May 2021 Fixed Interest Rate 2.25% To 3.25%, Maturing May 2021 [Member] Fixed Interest Rate 2.25% To 3.25%, Maturing May 2021 [Member] Fixed Interest Rate 2.75% To 3.50%, Maturing April 2022 Fixed Interest Rate 2.75% To 3.50%, Maturing April 2022 [Member] Fixed Interest Rate 2.75% To 3.50%, Maturing April 2022 [Member] Fair value of derivative instruments Derivatives, Fair Value [Line Items] Hedge ineffectiveness recorded in other income Derivative, Net Hedge Ineffectiveness Gain (Loss) Notional Derivative, Notional Amount Gain on unwinding of swaps Proceeds from Derivative Instrument, Financing Activities Derivative change in fair value recognition period Derivative Instrument, Change In Fair Value, Recognition Period Derivative Instrument, Change In Fair Value, Recognition Period Gain on derivative expected amount to be reclassified Interest Rate Cash Flow Hedge Gain (Loss) to be Reclassified During Next 12 Months, Net Fixed Interest Rate Derivative, Fixed Interest Rate Total fair value derivative assets Derivative Asset, Fair Value, Gross Asset Total fair value derivative liabilities Interest (income) expense Interest Income (Expense), Nonoperating, Net Accounting Policies [Abstract] ACCOUNTING POLICIES AND PRONOUNCEMENTS New Accounting Pronouncements and Changes in Accounting Principles [Text Block] Equity Method Investments and Joint Ventures [Abstract] Investments in and Advances to Affiliates [Table] Investments in and Advances to Affiliates [Table] Counterparty Name [Axis] Counterparty Name [Axis] Counterparty Name [Domain] Counterparty Name [Domain] USAA USAA [Member] USAA [Member] Real Estate Property Ownership [Axis] Real Estate Property Ownership [Axis] Real Estate Properties [Domain] Real Estate Properties [Domain] Unconsolidated Properties Unconsolidated Properties [Member] Investment Type [Axis] Investment Type [Axis] Investments [Domain] Investments [Domain] Equity Method Investments Equity Method Investments [Member] Investment, Name [Axis] Investment, Name [Axis] Investment, Name [Domain] Investment, Name [Domain] USAA Joint Venture USAA Joint Venture [Member] USAA Joint Venture [Member] The Summit Discovery Land Joint Venture [Member] Represents information pertaining to the Discovery Land Joint Venture, a real estate affiliate of the entity. Real Estate and Other Affiliates Investments in and Advances to Affiliates [Line Items] Secured debt real estate affiliates Secured Debt Real Estate Affiliates Real Estate Affiliates carrying value as of the balance sheet date, including the current and noncurrent portions, of collateralized debt obligations (with maturities initially due after one year or beyond the operating cycle, if longer). Such obligations include mortgage loans, chattel loans, and any other borrowings secured by assets of the borrower. Share of entity in secured debt Share of Entity in Secured Debt Represents the reporting entity's proportionate share in indebtedness secured by the properties owned by real estate affiliates as on balance sheet date. Number of variable interest entities in which entity is primary beneficiary Variable Interest Entity, Number of Entities Represents the number of variable interest entities. Carrying values of the assets associated with the operations of the consolidated VIEs Variable Interest Entity, Consolidated, Carrying Amount, Assets Carrying values of the liabilities associated with the operations of the consolidated VIEs Variable Interest Entity, Consolidated, Carrying Amount, Liabilities Contribution of property Contribution of Property Fair value of property contributed Contribution Of Property, Fair Value Contribution Of Property, Fair Value Percent of equity capital Capital Contribution To Joint Venture, Percent Of Equity Capital Capital Contribution To Joint Venture, Percent Of Equity Capital Capital contribution to joint venture Capital Contribution to Joint Venture Capital contributed to joint venture to purchase a property. Joint venture capital obligations Capital Contributions, Joint Venture Capital Obligations Joint Venture Capital Obligations Equity ownership in joint venture Joint Venture Agreement, Equity Ownership Percentage Joint Venture Agreement, Equity Ownership Percentage Preferred return on capital Joint Venture, Preferred Return On Capital Joint Venture, Preferred Return On Capital Preferred return on capital of cash distribution Joint Venture, Preferred Return On Capital, Percent Of Cash Distributions Joint Venture, Preferred Return On Capital, Percent Of Cash Distributions Proceeds from issuance of debt Proceeds from Issuance of Debt SID bonds transferred to joint venture SID Bonds Transferred to Joint Venture Amount of SID bonds transferred to a Joint Venture. Transaction value of land contributed to joint venture Transaction Value Of The Land Contributed To Joint Venture Represents the amount of transaction value of land contributed to joint venture. Transactional value per acre of land contributed to joint venture Transactional Value Per Acre Of Land Contributed To Joint Venture The per acre value of the land contributed to a joint venture. Maximum contribution required to joint venture by co-venturer Maximum Contribution Required to Joint Venture by Co-Venturer Represents the maximum capital contribution required by the partner in a joint venture. Preferred return on capital Preferred Return on Capital Represents the percentage of preferred return on the capital of the entity. Cash distribution entitlement by the joint venture Cash Distribution Entitlement By The Joint Venture Represents information pertaining to entitlement of distribution by joint venture after receipt of capital contribution and preferred returns. New Accounting Pronouncements or Change in Accounting Principle [Table] New Accounting Pronouncements or Change in Accounting Principle [Table] Adjustments for New Accounting Pronouncements [Axis] Adjustments for New Accounting Pronouncements [Axis] Type of Adoption [Domain] Type of Adoption [Domain] Accounting Standard Update 2017-12 Accounting Standard Update 2017-12 [Member] Accounting Standard Update 2017-12 [Member] Accounting Standards Update 2016-18 Accounting Standards Update 2016-18 [Member] New Accounting Pronouncement, Early Adoption [Axis] New Accounting Pronouncement, Early Adoption [Axis] New Accounting Principles, Early Adoption [Domain] New Accounting Principles, Early Adoption [Domain] New Accounting Pronouncement, Early Adoption, Effect New Accounting Pronouncement, Early Adoption, Effect [Member] New Accounting Pronouncements or Change in Accounting Principle [Line Items] New Accounting Pronouncements or Change in Accounting Principle [Line Items] Reclassification out of AOCI to retained earnings Decrease to accumulated other comprehensive income Cumulative effect of adjustment Cumulative Effect of New Accounting Principle in Period of Adoption Reclassification of cash used in operating activities Net Cash Provided by (Used in) Operating Activities Reclassification of cash used in investing activities Net Cash Provided by (Used in) Investing Activities Increase in restricted cash Increase (Decrease) in Restricted Cash Contract assets Contract with Customer, Asset, Net Summary of AOCI Schedule of Accumulated Other Comprehensive Income (Loss) [Table Text Block] Summary of the amounts reclassified out of AOCI Reclassification out of Accumulated Other Comprehensive Income [Table Text Block] Segment Reporting [Abstract] Schedule of Segment Reporting Information, by Segment [Table] Schedule of Segment Reporting Information, by Segment [Table] Consolidation Items [Axis] Consolidation Items [Axis] Consolidation Items [Domain] Consolidation Items [Domain] Operating Segments Operating Segments [Member] Corporate expenses and other items Corporate, Non-Segment [Member] Operating Operating Assets [Member] Represents the Operating Assets, a reportable segment of the entity. It includes commercial, mixed use and retail properties currently generating revenues. Strategic Strategic Developments [Member] Represents the Strategic Developments, a reportable segment of the entity. It includes all properties held for development and redevelopment, including the current rental property operations as well as one residential condominium project located in Natick (Boston), Massachusetts. Segments reporting Segment Reporting Information [Line Items] Number of reportable segments Number of Reportable Segments Total revenues Total operating expenses Depreciation and amortization Interest (expense) income, net Interest Income (Expense), Net Segment EBT Corporate expenses and other items Expenses And Other Expenses And Other Property damage repair charge Property Damage Repair Charge Property Damage Repair Charge Fair Value Disclosures [Abstract] Fair Value Measurements, Recurring and Nonrecurring [Table] Fair Value Measurements, Recurring and Nonrecurring [Table] Measurement Frequency [Axis] Measurement Frequency [Axis] Fair Value, Measurement Frequency [Domain] Fair Value, Measurement Frequency [Domain] Recurring Fair Value, Measurements, Recurring [Member] Fair Value, Hierarchy [Axis] Fair Value, Hierarchy [Axis] Fair Value Hierarchy [Domain] Fair Value Hierarchy [Domain] Quoted Prices in Active Markets for Identical Assets (Level 1) Fair Value, Inputs, Level 1 [Member] Significant Other Observable Inputs (Level 2) Fair Value, Inputs, Level 2 [Member] Significant Unobservable Inputs (Level 3) Fair Value, Inputs, Level 3 [Member] Fair value of financial instruments Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] Assets: Assets, Fair Value Disclosure [Abstract] Cash equivalents Cash and Cash Equivalents, Fair Value Disclosure Interest rate swap derivative assets Interest Rate Derivative Assets, at Fair Value Liabilities: Liabilities, Fair Value Disclosure [Abstract] Interest rate swap derivative liabilities Interest Rate Derivative Liabilities, at Fair Value Business Combinations [Abstract] RECENT TRANSACTIONS Business Combination Disclosure [Text Block] Reconciliation of Assets from Segment to Consolidated [Table] Reconciliation of Assets from Segment to Consolidated [Table] Corporate and other Reconciliation of total segment assets to total assets Segment Reporting, Asset Reconciling Item [Line Items] Assets Statement of Stockholders' Equity [Abstract] Class of Warrant or Right [Axis] Class of Warrant or Right [Axis] Class of Warrant or Right [Domain] Class of Warrant or Right [Domain] Management Warrants Management Warrants [Member] Represents the Management Warrants, a type of the warrant that gives the holder the right to purchase shares of stock in accordance with the terms of the instrument, usually upon payment of a specified amount. Title of Individual [Axis] Title of Individual [Axis] Relationship to Entity [Domain] Relationship to Entity [Domain] Chief Executive Officer Chief Executive Officer [Member] Common Stock Common Stock [Member] Additional Paid-in Capital Additional Paid-in Capital [Member] Accumulated Deficit Retained Earnings [Member] Accumulated Other Comprehensive (Loss) Income AOCI Including Portion Attributable to Noncontrolling Interest [Member] Treasury Stock Treasury Stock [Member] Total Stockholders' Equity Parent [Member] Noncontrolling Interest Noncontrolling Interest [Member] Increase (Decrease) in Stockholders' Equity Increase (Decrease) in Stockholders' Equity [Roll Forward] Balance at the beginning of the period (in shares) Shares, Outstanding Balance at the beginning of the period Balance at the beginning of the period (in shares) Treasury Stock, Common, Shares Interest rate swaps, net of tax Capitalized swap interest, net of tax Stock plan activity (in shares) Stock Issued During Period, Shares, Share-based Compensation, Net of Forfeitures Stock plan activity Adjustments to Additional Paid in Capital, Share-based Compensation, Requisite Service Period Recognition Exercise of warrants (in shares) Stock Issued During Period Shares, Stock Warrants Exercised Number of share warrants (or share units) exercised during the current period. Exercise of Warrants Stock Issued During Period Value Stock Warrants Exercise The amount of share warrants (or share units) exercised during the current period. Adoption of ASU 2014-09 Repurchase of common shares (in shares) Stock Repurchased During Period, Shares Repurchase of common shares Stock Repurchased During Period, Value Contributions to joint ventures Noncontrolling Interest, Increase From Contributions To Joint Venture Noncontrolling Interest, Increase From Contributions To Joint Venture Balance at the end of the period (in shares) Balance at the end of the period Balance at the end of the period (in shares) Number of shares called by warrants (in shares) Class of Warrant or Right, Number of Securities Called by Warrants or Rights Total warrant price Class Of Warrant or Right Price Of Warrants Or Rights The price of warrants or rights outstanding. Purchase price payment due date Class Of Warrant Or Right, Purchase Price Payment Due Period Class Of Warrant Or Right, Purchase Price Payment Due Period Derivative Instruments, Gain (Loss) [Table] Derivative Instruments, Gain (Loss) [Table] Hedging Relationship [Axis] Hedging Relationship [Axis] Hedging Relationship [Domain] Hedging Relationship [Domain] Cash Flow Hedging Cash Flow Hedging [Member] Effect of the Company's derivative financial instruments on the income statement Derivative Instruments, Gain (Loss) [Line Items] Amount of Gain (Loss) Recognized in AOCI on Derivative Derivative Instruments, Gain (Loss) Recognized in Other Comprehensive Income (Loss), Effective Portion, Net Amount of Gain (Loss) Reclassified from AOCI into Operations Derivative Instruments, Gain (Loss) Reclassified from Accumulated OCI into Income, Effective Portion, Net Interest expense MORTGAGES, NOTES AND LOANS PAYABLE Debt Disclosure [Text Block] Schedule of Antidilutive Securities Excluded from Computation of Earnings Per Share [Table] Schedule of Antidilutive Securities Excluded from Computation of Earnings Per Share [Table] Antidilutive Securities [Axis] Antidilutive Securities [Axis] Antidilutive Securities, Name [Domain] Antidilutive Securities, Name [Domain] Employees Directors and Consultants Stock Options Employees Directors And Consultants Stock Options [Member] An arrangement whereby an employee, member of the Board of Directors or consultants are entitled to receive in the future, subject to vesting and other restrictions, a number of shares in the entity at a specified price, as defined in the agreement. Restricted Stock Restricted Stock [Member] Antidilutive securities excluded from computation of diluted earnings per share Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items] Antidilutive securities excluded from computation of diluted earnings per share (in shares) Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount Accounting Policies and Pronouncements New Accounting Pronouncements, Policy [Policy Text Block] Document and Entity Information Entity Registrant Name Entity Registrant Name Entity Central Index Key Entity Central Index Key Document Type Document Type Document Period End Date Document Period End Date Amendment Flag Amendment Flag Current Fiscal Year End Date Current Fiscal Year End Date Entity Current Reporting Status Entity Current Reporting Status Entity Filer Category Entity Filer Category Entity Common Stock, Shares Outstanding Entity Common Stock, Shares Outstanding Document Fiscal Year Focus Document Fiscal Year Focus Document Fiscal Period Focus Document Fiscal Period Focus OTHER ASSETS AND LIABILITIES Schedule of Other Assets and Liabilities [Table] Schedule of Other Assets and Liabilities [Table] Information related to significant components of other assets and liabilities of the entity. Initial Application Period Cumulative Effect Transition [Axis] Initial Application Period Cumulative Effect Transition [Axis] Initial Application Period Cumulative Effect Transition [Domain] Initial Application Period Cumulative Effect Transition [Domain] Impact of Adoption of ASC Topic 606 Difference between Revenue Guidance in Effect before and after Topic 606 [Member] Accounting Standards Update 2014-09 Accounting Standards Update 2014-09 [Member] Finite Lived Intangible Assets and Liabilities, by Major Class [Axis] Finite Lived Intangible Assets and Liabilities, by Major Class [Axis] Information by major type or class of finite Lived intangible assets or liabilities. Finite Lived Intangible Assets and Liabilities, by Major Class [Domain] Finite Lived Intangible Assets And Liabilities By Major Class [Domain] The major class of finite Lived intangible assets and liabilities. Leases, Acquired-in-Place Leases, Acquired-in-Place [Member] Ground Leases below Market Ground Leases Below Market [Member] Ground leases acquired as part of a real property acquisition at below market lease rate. Ground Leases above Market Ground Leases Above Market [Member] Ground leases acquired as part of a real property acquisition at above market lease rate. Other assets and liabilities Other Assets and Liabilities [Line Items] Prepaid Expenses and Other Assets Prepaid Expense and Other Assets [Abstract] Condominium inventory Condominium Inventory Condominium Inventory Straight-line rent Straight Line Rent Asset The asset that represents the cumulative difference between the rental payments required by a lease agreement and the rental income or expense recognized on a straight-line basis, or other systematic and rational basis more representative of the time pattern in which use or benefit is granted or derived from the leased property, expected to be recognized in income or expense over the term of the leased property by the lessor or lessee, respectively. Intangibles Other Intangible Assets, Net Special Improvement District receivable Special Improvement District Receivable Represents the carrying amount of the reimbursement receivable for principal paid on Special Improvement District bonds including interest. Net carrying amount Finite-Lived Intangible Assets, Net Security and escrow deposits Deposit Assets Equipment, net of accumulated depreciation of $7.5 million and $6.9 million, respectively Property, Plant and Equipment, Other, Net Other Other Assets Prepaid expenses Prepaid Expense Tenant incentives and other receivables Other Receivables Interest rate swap derivative assets Derivative Fair Value Of Derivative Interest Rate Swap Fair value, before effects of master netting arrangements, of an interest rate swap with one or more underlyings, notional amount or payment provision or both, and the contract can be net settled by means outside the contract or delivery of an asset. TIF receivable Value Added Tax Receivable Federal income tax receivable Income Taxes Receivable Condominium receivables Condominium Receivables Represents the amount of condominium receivables. Prepaid expenses and other assets, net Accumulated depreciation on other equipment Accumulated Depreciation Other Equipment Accumulated depreciation for other depreciable equipment. Decrease in prepaid expenses and other assets Increase (Decrease) in Prepaid Expense and Other Assets. The increase (decrease) during the reporting period in the value of prepaid expenses and other assets not separately disclosed in the statement of cash flows. Decrease in condominium receivables Increase (Decrease) In Prepaid Expenses And Other Assets Condominium Receivables Represents the increase (decrease) in condominium receivables during the reporting period. Decrease in in-place leases Increase Decrease in In-Place Leases Represents the increase (decrease) in in-place leases during the reporting period. Decrease in special improvement district receivable Increase Decrease In Special Improvement District Receivable Represents the increase (decrease) during the reporting period in the value of special improvement district receivable not separately disclosed in the statement of cash flows. Decrease in prepaid expense Increase (Decrease) in Prepaid Expense Increase in condominium inventory Increase (Decrease) In Condominium Inventory Increase (Decrease) In Condominium Inventory Increase in straight line rent Increase Decrease In Deferred Rent Credit Represents the increase (decrease) during the reporting period in the value of deferred rent credit not separately disclosed in the statement of cash flows. Increase in derivative assets Increase (Decrease) in Derivative Assets Accounts Payable and Accrued Liabilities [Abstract] Accounts Payable and Accrued Liabilities [Abstract] Construction payables Construction Payable Condominium deposit liabilities Accounts Payable and Accrued Expenses Condominium Deposits Represents the amount of condominium deposits, which is the component of accounts payable and accrued expenses. Deferred income Deferred Revenue and Credits Other Other Liabilities Accrued payroll and other employee liabilities Employee-related Liabilities Tenant and other deposits Security Deposit Liability Accrued interest Interest Payable Accounts payable and accrued expenses Other Accounts Payable and Accrued Liabilities Accrued real estate taxes Accrual for Taxes Other than Income Taxes Straight-line ground rent liability Straight Line Rent Liability Straight-line Rent Liability Interest rate swaps Above-market ground leases Finite Lived Intangible Liabilities, Net Represents the net carrying value of major finite-lived intangible liabilities class as of the balance sheet date. Accounts payable and accrued expenses Increase in accounts payable and accrued expenses Increase Decrease In Accounts Payable And Accrued Expenses Represents the increase (decrease) during the reporting period in the amounts payable to vendors for goods and services received and the amount of obligations and expenses incurred but not paid. Increase in condominium deposits liability Increase (Decrease) in Accounts Payable and Accrued Expenses Condominium Deposits Represents the increase (decrease) during the reporting period in the amount of obligations related to receipts from buyers of condominium deposits. Increase in construction payables Increase (Decrease) in Construction Payables Increase in tenant and other deposits Increase (Decrease) in Security Deposits Decrease in accrued payroll and other employee liabilities Increase (Decrease) in Accrued Salaries Decrease in accounts payable and accrued expenses Increase (Decrease) in Other Accounts Payable and Accrued Liabilities Decrease in other Decrease In Other Liabilities Amount of decrease in other liabilities. Decrease in interest rate swap liability Increase (Decrease) in Derivative Liabilities Decrease in accrued real estate taxes Increase Decrease In Accrued Real Estate Taxes Represents information accrued real estate taxes. Summary of the significant components of prepaid expenses and other assets Schedule of Other Assets [Table Text Block] Summary of the significant components of accounts payable and accrued expenses Schedule of Accounts Payable and Accrued Liabilities [Table Text Block] Disclosure of Compensation Related Costs, Share-based Payments [Abstract] STOCK-BASED PLANS Disclosure of Compensation Related Costs, Share-based Payments [Text Block] Fair Value, by Balance Sheet Grouping [Table] Fair Value, by Balance Sheet Grouping [Table] Measurement Basis [Axis] Measurement Basis [Axis] Fair Value Measurement [Domain] Fair Value Measurement [Domain] Portion at Fair Value Measurement [Member] Portion at Fair Value Measurement [Member] Carrying Amount Reported Value Measurement [Member] Estimated Fair Value Estimate of Fair Value Measurement [Member] Financial instruments that are not measured at fair value on a recurring basis Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] Cash and restricted cash Cash, Cash Equivalents, Restricted Cash and Restricted Cash Equivalents Accounts receivable, net Accounts Receivable, Fair Value Disclosure Notes receivable, net Notes Receivable, Fair Value Disclosure Liabilities: Fixed-rate debt: Long-term Debt, Percentage Bearing Fixed Interest, Amount Variable-rate debt: Long-term Debt, Percentage Bearing Variable Interest, Amount Allowance for doubtful accounts Allowance for Doubtful Accounts Receivable Allowance for notes receivable Financing Receivable, Allowance for Credit Losses Schedule of Disaggregation of Revenue Disaggregation of Revenue [Table Text Block] Schedule of Contract with Customer, Asset and Liability Contract with Customer, Asset and Liability [Table Text Block] Schedule of Remaining Unsatisfied Performance Obligations Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Table Text Block] Other Liabilities [Abstract] Class of Warrant or Right [Table] Class of Warrant or Right [Table] Chief Financial Officer Chief Financial Officer [Member] President President [Member] Class of Warrant or Right [Line Items] Class of Warrant or Right [Line Items] Exercise price (in dollars per share) Class of Warrant or Right, Exercise Price of Warrants or Rights Proceeds from issuance of Management warrants Proceeds from Issuance of Warrants Effective tax rate (as a percent) Effective Income Tax Rate Reconciliation, Percent Deferred tax liabilities OTHER ASSETS AND LIABILITIES Other Assets and Liabilities [Text Block] Entire disclosure of other assets and other liabilities of the entity. Disaggregation of Revenue [Table] Disaggregation of Revenue [Table] Condominium rights and unit sales Master Planned Communities land sales Hospitality revenues Builder price participation Other land revenues Other rental and property revenues Timing of Transfer of Good or Service [Axis] Timing of Transfer of Good or Service [Axis] Timing of Transfer of Good or Service [Domain] Timing of Transfer of Good or Service [Domain] Recognized at a point in time: Transferred at Point in Time [Member] Recognized at a point in time and/or over time: Transfer At Point In Time And Over Time [Member] Transfer At Point In Time And Over Time [Member] Disaggregation of Revenue [Line Items] Disaggregation of Revenue [Line Items] Total rental income Rental Income Rental Income SEGMENTS Segment Reporting Disclosure [Text Block] Organization, Consolidation and Presentation of Financial Statements [Abstract] Schedule of Financial Statement Line Items Affected As Result Of New Revenue Recognition Standard Schedule of New Accounting Pronouncements and Changes in Accounting Principles [Table Text Block] Accumulated Other Comprehensive Income (Loss) [Table] Accumulated Other Comprehensive Income (Loss) [Table] Accumulated Other Comprehensive Income (Loss) [Line Items] Accumulated Other Comprehensive Income (Loss) [Line Items] AOCI Attributable to Parent, Net of Tax [Roll Forward] AOCI Attributable to Parent, Net of Tax [Roll Forward] Other comprehensive income before reclassifications Other Comprehensive Income (Loss), before Reclassifications, Net of Tax Adjustment related to adoption of ASU 2018-02 Adjustment related to adoption of ASU 2017-12 Net current-period other comprehensive income Other Comprehensive Income (Loss), Net of Tax Prepaid expenses and other assets, net increase (decrease) as result of ASU adoption Increase in accumulated deficit Decrease in deferred tax liability Condominium receivables Net property and equipment EARNINGS PER SHARE Earnings Per Share [Text Block] Total Assets Equity Method Investment, Summarized Financial Information, Assets Total Liabilities Equity Method Investment, Summarized Financial Information, Liabilities Total Equity Equity Method Investment Summarized Financial Information, Equity Revenues Equity Method Investment, Summarized Financial Information, Revenue Net income Equity Method Investment, Summarized Financial Information, Net Income (Loss) Gross Margin Equity Method Investment, Summarized Financial Information, Gross Profit (Loss) FAIR VALUE Fair Value Disclosures [Text Block] 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 [Axis] Award Type [Axis] Equity Award [Domain] Equity Award [Domain] Stock-based plans Share-based Compensation Arrangement by Share-based Payment Award [Line Items] Stock Options Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding [Roll Forward] Stock options outstanding at the beginning of the period (in shares) Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Number Granted (in shares) Share-based Compensation Arrangement by Share-based Payment Award, Options, Grants in Period, Gross Exercised (in shares) Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercises in Period Forfeited (in shares) Share-based Compensation Arrangement by Share-based Payment Award, Options, Forfeitures in Period Stock options outstanding at the end of the period (in shares) Weighted Average Exercise Price Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Weighted Average Exercise Price [Abstract] Stock options outstanding at the beginning of the period (in dollars per share) Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Weighted Average Exercise Price Granted (in dollars per share) Share-based Compensation Arrangements by Share-based Payment Award, Options, Grants in Period, Weighted Average Exercise Price Exercised (in dollars per share) Share-based Compensation Arrangements by Share-based Payment Award, Options, Exercises in Period, Weighted Average Exercise Price Forfeited (in dollars per share) Share-based Compensation Arrangements by Share-based Payment Award, Options, Forfeitures in Period, Weighted Average Exercise Price Stock options outstanding at the end of the period (in dollars per share) Stock based compensation expense Allocated Share-based Compensation Expense Share based compensation costs capitalized Employee Service Share-based Compensation, Allocation of Recognized Period Costs, Capitalized Amount Debt Instrument [Line Items] Area of land sold (in acres) Area of Land Sold Represents the area of land sold by the entity during the period. Sales price of land Land Sales Purchase price of land acquired Purchase Price Of Land Acquired Purchase Price Of Land Acquired Payments to acquire land Payments to Acquire Land Repurchase of common shares (in shares) Repurchase price per share (in dollars per share) Stock Repurchased During Period, Price Per Share Stock Repurchased During Period, Price Per Share Repurchase of common shares Recognition Under Previous Guidance Calculated under Revenue Guidance in Effect before Topic 606 [Member] Condensed Consolidated Balance Sheet (in thousands) Balance Sheet Related Disclosures [Abstract] Buildings and equipment, net Buildings And Equipment, Net Buildings And Equipment, Net Condensed Consolidated Statements of Operations (in thousands) Operating income (loss) before other items Net income (loss) Net income (loss) attributable to common stockholders Condensed Consolidated Statements of Comprehensive Income (in thousands) Comprehensive Income (Loss), Net of Tax, Attributable to Parent [Abstract] Comprehensive income Comprehensive income attributable to common stockholders Condensed Consolidated Statements of Cash Flows (in thousands) Statement of Cash Flows [Abstract] Deferred income taxes Deferred Income Tax Expense (Benefit) Percentage of completion revenue recognition from sale of condominium rights and unit sales Percent Of Completion Condominium Rights And Unit Sales Revenue Percent Of Completion Condominium Rights And Unit Sales Revenue Summary of mortgages, notes and loans payable Schedule of Long-term Debt Instruments [Table Text Block] Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Table] Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Table] Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis] Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis] Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items] Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items] Remaining performance obligation, expected timing of satisfaction period Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Period Remaining performance obligation Revenue, Remaining Performance Obligation Summary of Assets and Liabilities Measured on a Recurring Basis Schedule of Fair Value, Assets and Liabilities Measured on Recurring Basis [Table Text Block] Rollforward of Sponsor and Management Warrants Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation [Table Text Block] Summary of assets and liabilities that were measured at fair value on a non-recurring basis Fair Value Measurements, Nonrecurring [Table Text Block] Asset Impairment Charges [Abstract] IMPAIRMENT Asset Impairment Charges [Text Block] Summary of stock option plan activity Schedule of Stock Options Roll Forward [Table Text Block] Summary of restricted stock activity Share-based Compensation, Activity [Table Text Block] WARRANTS Schedule of Stockholders' Equity Note, Warrants or Rights [Table Text Block] Change In Contract With Customer, Liability [Roll Forward] Change In Contract With Customer, Liability [Roll Forward] Change In Contract With Customer, Liability [Roll Forward] Beginning balance Contract with Customer, Liability Consideration earned during the period Contract with Customer, Liability, Revenue Recognized Consideration received during the period Contract With Customer, Liability, Increase From Consideration Received Contract With Customer, Liability, Increase From Consideration Received Ending balance Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation [Table] Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation [Table] Liability Class [Axis] Liability Class [Axis] Fair Value by Liability Class [Domain] Fair Value by Liability Class [Domain] Warrant Warrant [Member] Fair value of financial instruments Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items] Reconciliation of the beginning and ending balances of the fair value measurements using significant unobservable inputs (Level 3) Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward] Balance at the beginning of the period Fair Value, Measurement with Unobservable Inputs Reconciliations, Recurring Basis, Liability Value Warrant liability loss Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Liability, Gain (Loss) Included in Earnings Exercises of Sponsor and Management Warrants Balance at the end of the period Marketability discount due to lapses of restriction period Marketability Discount Due To Lapses Of Restriction Period Represents the amount of marketability discount due to lapses of restriction period. DERIVATIVE INSTRUMENTS AND HEDGING ACTIVITIES Derivative Instruments and Hedging Activities Disclosure [Text Block] Las Vegas 51s LLC Las Vegas51s Llc [Member] Represents Las Vegas 51s LLC Constellation Constellation [Member] Represents Constellation The Metropolitan Downtown Columbia Metropolitan Downtown Columbia [Member] Represents The Metropolitan Downtown Columbia (d) Stewart Title of Montgomery County, TX Stewart Title Of Montgomery County Tx [Member] Represents Stewart Title of Montgomery County, TX Woodlands Sarofim 1 Woodlands Sarofim1 [Member] Represents the information pertaining to Woodlands Sarofim 1, a real estate affiliate of the entity. m.flats/TEN.M Parcel C [Member] Information pertaining to the Parcel C. Circle T Ranch and Power Center Circle T [Member] Represents the information pertaining to Circle T, a real estate affiliate of the entity. HHMK Development H H M K Development L L C [Member] Represents the information pertaining to HHMK Development, LLC, a real estate affiliate of the entity. KR Holdings K R Holdings L L C [Member] Represents information pertaining to KR Holdings, LLC with whom the entity entered into a joint venture. 33 Peck Slip Peck Slip33 Grandview Shg Llc [Member] Represents 33 Peck Slip (Grandview SHG, LLC) Cost method investments Cost-method Investments [Member] Investment in Real Estate and Other Affiliates Investments in and Advances to Affiliates, Balance [Abstract] Economic/Legal Ownership Equity Method Investment, Ownership Percentage Carrying Value Share of Earnings/Dividends Investment deficit position Investments In Affiliates Subsidiaries Associates And Joint ventures Liability Total investment liabilities in (A) an entity in which the entity has significant influence, but does not have control, (B) subsidiaries that are not required to be consolidated and are accounted for using the equity and or cost method, and (C) an entity in which the reporting entity shares control of the entity with another party or group. Includes long-term advances receivable from a party that is affiliated with the reporting entity by means of direct or indirect ownership. Summerlin Las Vegas Baseball Club LLC Summerlin Las Vegas Baseball Club L L C [Member] Represents information pertaining to Summerlin Las Vegas Baseball Club, LLC, a joint venture entity. CONSOLIDATED STATEMENTS OF CASH FLOWS Cash Flows from Operating Activities: Net Cash Provided by (Used in) Operating Activities, Continuing Operations [Abstract] Adjustments to reconcile net (loss) income to cash used in operating activities: Net Cash Provided by (Used in) Operating Activities [Abstract] Depreciation Depreciation Amortization Amortization Amortization of deferred financing costs Amortization of Debt Issuance Costs and Discounts Amortization of intangibles other than in-place leases Amortization of Intangibles Other than in Place Leases The aggregate expense charged against earnings to allocate the cost of intangible assets other than in place lease (nonphysical assets not used in production) in a systematic and rational manner to the periods expected to benefit from such assets. As a noncash expense, this element is added back to net income when calculating cash provided by or used in operations using the indirect method. Straight-line rent amortization Straight Line Rent Restricted stock and stock option amortization Gains on sales of properties Gain (Loss) on Sale of Properties Gain on acquisition of joint venture partner's interest Net decrease (increase) in minimum pension liability Increase (Decrease) in Obligation, Pension Benefits Warrant liability loss Loss on redemption of senior notes due 2021 Equity in earnings from real estate and other affiliates, net of distributions Income (Loss) from Equity Method Investments, Net of Dividends or Distributions Master Planned Communities land acquisitions Master Planned Community Land Acquisitions Represents master planned community land acquisitions expenditure during the period. Master Planned Communities development expenditures Master Planned Community Development Expenditures Represents master planned community development expenditures during the period. Master Planned Communities cost of sales Master Planned Community Cost of Sales Represents master planned community cost of sales. Condominium development expenditures Condominium Development Expenditures Represents condominium development expenditures during the period. Net changes: Increase (Decrease) in Operating Capital [Abstract] Accounts and notes receivable Increase (Decrease) in Accounts and Notes Receivable Prepaid expenses and other assets Increase (Decrease) in Prepaid Expense and Other Assets Condominium deposits received Increase (Decrease) in Customer Deposits Deferred expenses Increase (Decrease) in Deferred Charges Accounts payable and accrued expenses Increase (Decrease) in Accounts Payable and Accrued Liabilities Condominium deposits receivable Increase (Decrease) in Accounts Receivable Other, net Increase (Decrease) in Other Operating Assets and Liabilities, Net Cash used in operating activities Cash Flows from Investing Activities: Net Cash Provided by (Used in) Investing Activities [Abstract] Property and equipment expenditures Payments to Acquire Property, Plant, and Equipment Operating property improvements Payments to Develop Real Estate Assets Property developments and redevelopments Payments to Acquire and Develop Real Estate Acquisition of assets Other Payments to Acquire Businesses Proceeds for reimbursement of development costs Proceeds from Advances for Construction Proceeds from sales of properties Proceeds from Sale of Real Estate Held-for-investment Proceeds from Tax Increment Financings Proceeds From Tax Increment Financing Proceeds From Tax Increment Financing Distributions from real estate and other affiliates Proceeds from Distributions Received from Real Estate Partnerships Note issued to real estate and other affiliates Origination of Notes Receivable from Related Parties Proceeds from repayment of note to Real Estate Affiliate Proceeds from (Repayments of) Related Party Debt Maturity of long term investment Proceeds from Maturities, Prepayments and Calls of Long-term Investments Investments in real estate and other affiliates, net Payments to Acquire Interest in Subsidiaries and Affiliates Cash used in investing activities Cash Flows from Financing Activities: Net Cash Provided by (Used in) Financing Activities [Abstract] Proceeds from mortgages, notes and loans payable Proceeds from Issuance of Long-term Debt Principal payments on mortgages, notes and loans payable Premium paid to redeem 2021 senior notes Payments Of Premium On Redemption of Notes The amount of payments of premiums on the redemption of notes payable. Purchase of treasury stock Payments for Repurchase of Common Stock Special Improvement District bond funds released from escrow Special Improvement District Bonds Held In Escrow Special Improvement District Bonds Released from (Held In) Escrow Deferred financing costs and bond issuance costs, net Payments of Financing Costs Taxes paid on stock options exercised and restricted stock vested Payments Related to Tax Withholding for Share-based Compensation Stock options exercised Proceeds from Stock Options Exercised Issuance of noncontrolling interests Proceeds from Noncontrolling Interests Cash provided by financing activities Net Cash Provided by (Used in) Financing Activities Net change in cash, cash equivalents and restricted cash Cash, Cash Equivalents, Restricted Cash and Restricted Cash Equivalents, Period Increase (Decrease), Excluding Exchange Rate Effect Cash, cash equivalents and restricted cash at beginning of period Cash, cash equivalents and restricted cash at end of period Supplemental Disclosure of Cash Flow Information: Supplemental Cash Flow Information [Abstract] Interest paid Interest Paid, Net Interest capitalized Interest Costs Capitalized Income taxes paid (refunded), net Income Taxes Paid, Net Non-Cash Transactions: Cash Flow, Noncash Investing and Financing Activities Disclosure [Abstract] Exercise of Sponsor and Management Warrants Noncash Exercise Of Warrants The amount of warrants exercised as part of a noncash transaction. Special Improvement District bond transfers associated with land sales Special Improvement District Bond Transfers Associated with Land Sales This element represents special improvement district bond transfers associated with land sales. Accrued interest on construction loan borrowing Accrued Interest Included In Construction Loan Payable Non Cash Represents the accrued interest included in construction loan payable. Capitalized stock compensation Capitalized Share Based Compensation Amounts capitalized relating to share based compensation Acquisition of Las Vegas 51s Business Combination, Description [Abstract] Building Noncash Or Part Noncash Acquisition Furniture And Fixtures Acquired Noncash Or Part Noncash Acquisition Furniture And Fixtures Acquired Developments Noncash Or Part Noncash Acquisition Development Acquired The amount of Development that an Entity acquires in a noncash (or part noncash) acquisition. Noncash is defined as information about all investing and financing activities of an enterprise during a period that affect recognized assets or liabilities but that do not result in cash receipts or cash payments in the period. "Part noncash" refers to that portion of the transaction not resulting in cash receipts or cash payments in the period. Accounts receivable Noncash Or Part Noncash Acquisition Accounts Receivable Acquired The amount of Accounts Receivable that an Entity acquires in a noncash (or part noncash) acquisition. Noncash is defined as information about all investing and financing activities of an enterprise during a period that affect recognized assets or liabilities but that do not result in cash receipts or cash payments in the period. "Part noncash" refers to that portion of the transaction not resulting in cash receipts or cash payments in the period. Other assets Noncash Or Part Noncash Acquisition Other Assets Acquired The amount of other assets that an Entity acquires in a noncash (or part noncash) acquisition that are not presented as a separate disclosure or not otherwise listed in the existing taxonomy. Noncash is defined as information about all investing and financing activities of an enterprise during a period that affect recognized assets or liabilities but that do not result in cash receipts or cash payments in the period. Other liabilities Noncash Or Part Noncash Acquisition Other Liabilities Assumed The amount of Other liabilities that an entity assumes in acquiring a business or in consideration for an asset received in a noncash (or part noncash) acquisition that are not presented as a separate disclosure or otherwise listed in the existing taxonomy. Noncash is defined as transactions during a period that affect recognized assets or liabilities but that do not result in cash receipts or cash payments in the period. "Part noncash" refers to that portion of the transaction not resulting in cash receipts or cash payments in the period. COMMITMENTS AND CONTINGENCIES Commitments and Contingencies Disclosure [Text Block] REAL ESTATE AND OTHER AFFILIATES Equity Method Investments and Joint Ventures Disclosure [Text Block] BASIS OF PRESENTATION AND ORGANIZATION Organization, Consolidation and Presentation of Financial Statements Disclosure [Text Block] Summary of segment operating results Schedule of Segment Reporting Information, by Segment [Table Text Block] Summary of assets by segment and the reconciliation of total segment assets to the total assets in the Condensed Consolidated Balance Sheets Reconciliation of Assets from Segment to Consolidated [Table Text Block] Summary of Investments in Real Estate and Other Affiliates Real Estate Investment Financial Statements, Disclosure [Table Text Block] Unsecured 5.375% Senior Notes Unsecured Debt [Member] Secured mortgages, notes and loans payable Secured Debt [Member] Mortgages, notes and loans payable Unamortized bond issuance costs Unamortized Debt Issuance Expense Deferred financing costs Debt Issuance Costs, Net Total mortgages, notes and loans payable Amount of variable-rate debt swapped to fixed rate Derivative, Amount of Hedged Item ACCUMULATED OTHER COMPREHENSIVE INCOME (LOSS) Comprehensive Income (Loss) Note [Text Block] Interest rate swaps, tax Other Comprehensive Income (Loss), Unrealized Gain (Loss) on Derivatives Arising During Period, Tax Capitalized swap interest, tax (benefit) Other Comprehensive Income Loss Capitalized Swap Interest On Developments Tax effect, net of reclassification adjustment, of the change in accumulated gain (loss) from settled derivative instruments for which the underlying interest is capitalized. Restricted stock activity Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Number of Shares [Roll Forward] Restricted stock outstanding at the beginning of the period (in shares) Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Number Granted (in shares) Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period Vested (in shares) Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Vested in Period Forfeited (in shares) Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Forfeited in Period Restricted stock outstanding at the end of the period (in shares) 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] Restricted stock outstanding at the beginning of the period (in dollars per share) Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Weighted Average Grant Date Fair Value Granted (in dollars per share) Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period, Weighted Average Grant Date Fair Value Vested (in dollars per share) Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Vested in Period, Weighted Average Grant Date Fair Value Forfeited (in dollars per share) Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Forfeitures, Weighted Average Grant Date Fair Value Restricted stock outstanding at the end of the period (in dollars per share) Impairment on real estate Equity Method Investment, Other than Temporary Impairment