Related Party Transactions [Abstract] Schedule of Related Party Transactions, by Related Party [Table] Schedule of Related Party Transactions, by Related Party [Table] Related Party [Axis] Related Party [Axis] Related Party [Domain] Related Party [Domain] Unconsolidated Joint Ventures and Third Party Managed Properties Unconsolidated Joint Ventures and Third Party Managed Properties [Member] Represents unconsolidated joint ventures and third-party properties that engage the entity to manage their operations. Product and Service [Axis] Product and Service [Axis] Product and Service [Domain] Product and Service [Domain] Management fees Management Service [Member] Development and leasing fees Development and Leasing Fees [Member] Development and Leasing Fees [Member] Related Party Transaction [Line Items] Related Party Transaction [Line Items] Revenues Revenue from Contract with Customer, Excluding Assessed Tax Debt Disclosure [Abstract] Bank and Other Notes Payable Debt Disclosure [Text Block] Co-Venture Arrangement [Abstract] Co-Venture Arrangement [Abstract] Financing Arrangement Co-venture Arrangement Disclosure [Text Block] This text block represents complete disclosure with respect to co-venture arrangements. Commitments and Contingencies Disclosure [Abstract] Commitments and Contingencies Commitments and Contingencies Disclosure [Text Block] Income Tax Disclosure [Abstract] Schedule of income tax benefit of TRSs Schedule of Components of Income Tax Expense (Benefit) [Table Text Block] Organization, Consolidation and Presentation of Financial Statements [Abstract] Organization Nature of Operations [Text Block] Noncontrolling Interest [Abstract] Schedule of Subsidiary of Limited Liability Company or Limited Partnership [Table] Schedule of Subsidiary of Limited Liability Company or Limited Partnership [Table] Ownership [Axis] Ownership [Axis] Ownership [Domain] Ownership [Domain] Macerich The Macerich Company [Member] The Macerich Company [Member] Legal Entity [Axis] Legal Entity [Axis] Entity [Domain] Entity [Domain] The Macerich Partnership, L.P. The Macerich Partnership, L.P. [Member] Represents the information pertaining to real estate property of the entity, The Macerich Partnership, L.P. Subsidiary of Limited Liability Company or Limited Partnership [Line Items] Subsidiary of Limited Liability Company or Limited Partnership [Line Items] Ownership interest in operating partnership Noncontrolling Interest, Ownership Percentage by Parent Limited partnership interest of the operating partnership Noncontrolling Interest, Ownership Percentage by Noncontrolling Owners Common stock, par value (in dollars per share) Common Stock, Par or Stated Value Per Share Number of trading days used to calculate redemption value Minority Interest, Redemption Value Basis Number of Trading Days Minority Interest, Redemption Value Basis Number of Trading Days Redemption value of outstanding OP Units not owned by the Company Minority Interest Redemption Value Represents the aggregate redemption value for the noncontrolling interest. Number of management companies (in entities) Number of Real Estate Management Companies Represents the number of management companies through which the entity provides property management, leasing and redevelopment for its real estate portfolio. Schedule of Joint Ventures [Table] Schedule of Joint Ventures [Table] A schedule providing information pertaining to the joint venture interests of the entity. Range [Axis] Range [Axis] Range [Domain] Range [Domain] Minimum Minimum [Member] Maximum Maximum [Member] Related Party Transaction [Axis] Related Party Transaction [Axis] Related Party Transaction [Domain] Related Party Transaction [Domain] Financing Arrangement Financing Arrangement [Member] Financing Arrangement [Member] Name of Property [Axis] Name of Property [Axis] Name of Property [Domain] Name of Property [Domain] Chandler Freehold Freehold Raceway Mall and Chandler Fashion Center [Member] Represents the information pertaining to the Freehold Raceway Mall and Chandler Fashion Center properties. Chandler Fashion Center Chandler Fashion Center [Member] Represents the information pertaining to real estate property of the entity, Chandler Fashion Center. Freehold Raceway Mall Freehold Raceway Mall [Member] Represents the information pertaining to real estate property of the entity, Freehold Raceway Mall. Chandler Fashion Center Chandler Fashion Center Mortgage [Member] Mortgage note payable on the Chandler Fashion Center property pledged as collateral. Schedule of Joint Ventures [Line Items] Schedule of Joint Ventures [Line Items] -- None. No documentation exists for this element. -- Percentage of loan assumed by third party Joint Venture Ownership Percentage Sold The percentage of ownership interest in the joint venture sold by the entity during the period. Property area (in square feet) Area of Real Estate Property Terminal capitalization rate Financing Arrangement, Terminal Capitalization Rate Financing Arrangement, Terminal Capitalization Rate Discount rate Financing Arrangement, Discount Rate Financing Arrangement, Discount Rate Market rent per square foot Finance Leased Asset, Measurement Input Additional borrowing SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate, Face Amount of Mortgages Distributions, pro rata share of the excess loan proceeds Joint Venture, Distributions in Excess of Loan Proceeds Joint Venture, Distributions in Excess of Loan Proceeds Loans and Leases Receivable Disclosure [Abstract] Tenant and Other Receivables, net Loans, Notes, Trade and Other Receivables Disclosure [Text Block] Disclosure of Compensation Related Costs, Share-based Payments [Abstract] 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 units Stock Units [Member] Stock units as awarded by an entity to their employees as a form of incentive compensation. LTIP Units Long Term Incentive Plan [Member] Long-term incentive plan. Market-indexed Long Term Incentive Plan, Market-based [Member] Long Term Incentive Plan, Market-based [Member] Phantom stock units Phantom Share Units (PSUs) [Member] Share-based Compensation Arrangement by Share-based Payment Award [Line Items] Share-based Compensation Arrangement by Share-based Payment Award [Line Items] Conversion rate of shares Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments, Other than Options, Conversion Rate Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments, Other than Options, Conversion Rate Risk free interest rate Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions, Risk Free Interest Rate Volatility Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions, Expected Volatility Rate Capitalized share and unit-based compensation costs Employee Service Share-based Compensation, Allocation of Recognized Period Costs, Capitalized Amount Unrecognized compensation cost of share and unit-based plans Employee Service Share-based Compensation, Nonvested Awards, Compensation Cost Not yet Recognized Equity Method Investments and Joint Ventures [Abstract] Schedule of Equity Method Investments [Table] Schedule of Equity Method Investments [Table] Westside Pavilion Westside Pavilion [Member] Represents the information pertaining to real estate property of the entity, Westside Pavilion. Schedule of Equity Method Investments [Line Items] Schedule of Equity Method Investments [Line Items] Ownership percentage Joint Venture Ownership Percent Joint Venture Ownership Percent Outside partner interest of the operating partnership Joint Venture Ownership Percent by Other Owners Joint Venture Ownership Percent by Other Owners Proceeds from sale Proceeds from Divestiture of Businesses Reimbursement percent Reimbursement Percent, Collaborative Arrangement Reimbursement Percent, Collaborative Arrangement Joint Venture Corporate Joint Venture [Member] Assets: Assets [Abstract] Property, net Equity Method Investment, Summarized Financial Information, Real Estate Investment Property, Net The net book value of real estate investment property reported by an equity method investment of the entity. Other assets Equity Method Investment, Summarized Financial Information, Other Assets The aggregate carrying amount of other assets not separately disclosed, reported by an equity method investment of the entity. Total assets Equity Method Investment, Summarized Financial Information, Assets Liabilities and partners' capital: Liabilities and Equity [Abstract] Mortgage and other notes payable Equity Method Investment, Summarized Financial Information, Secured Debt Carrying value as of the balance sheet date, including the current and noncurrent portions, of collateralized debt obligations reported by an equity method investment of the entity. Other liabilities Equity Method Investment, Summarized Financial Information, Other Liabilities The aggregate carrying amount of other liabilities not separately disclosed, reported by an equity method investment of the entity. Company's capital Equity Method Investment, Underlying Equity in Net Assets Outside partners' capital Equity Method Investment, Summarized Financial Information, Equity or Capital Other Interests The amount of equity (capital) of an equity method investment of the entity that is attributable to other ownership interests. Total liabilities and partners' capital Equity Method Investment, Summarized Financial Information, Liabilities and Equity Investments in unconsolidated joint ventures: Investments in and Advance to Affiliates, Subsidiaries, Associates, and Joint Ventures [Abstract] Company's capital Basis adjustment Equity Method Investment, Difference Between Carrying Amount and Underlying Equity Investments in unconsolidated joint ventures Equity Method Investments, Net The carrying amount on the entity's balance sheet of its investment in common stock of an equity method investee, net of the liability for distributions received in excess of the entity's investment. Assets—Investments in unconsolidated joint ventures Equity Method Investments Liabilities—Distributions in excess of investments in unconsolidated joint ventures Investments in Unconsolidated Joint Ventures. The carrying amount of liabilities resulting from investments in unconsolidated real estate and joint ventures not separately presented as of the balance sheet date. Investments in unconsolidated joint ventures Stock Options Employee Stock Option [Member] Stock Options Share-based Compensation Arrangement by Share-based Payment Award, Stock Options, Outstanding [Abstract] Share-based Compensation Arrangement by Share-based Payment Award, Stock Options, Outstanding [Abstract] Units Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding [Roll Forward] Balance at beginning of 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, Net of Forfeitures Exercised (in shares) Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercises in Period Balance at end of period (in shares) Value Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Weighted Average Exercise Price [Abstract] Balance at beginning of 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 Arrangement by Share-based Payment Award, Options, Grants in Period, Weighted Average Grant Date Fair Value Exercised (in dollars per share) Share-based Compensation Arrangements by Share-based Payment Award, Options, Exercises in Period, Weighted Average Exercise Price Balance at end of period (in dollars per share) Schedule of LTIP Units Granted Share-based Compensation Arrangement by Share-based Payment Award, Options, Grants in Period, Weighted Average Grant Date Fair Value [Table Text Block] Summary of activity of non-vested LTIP Units, stock awards, phantom stock and stock units Share-based Compensation, Stock Options, Activity [Table Text Block] Summary of activity of SARs and stock options outstanding Schedule of Share-based Compensation, Stock Appreciation Rights Award Activity [Table Text Block] Compensation cost under the share and unit-based plans Schedule of Compensation Cost for Share-based Payment Arrangements, Allocation of Share-based Compensation Costs by Plan [Table Text Block] Subsequent Events [Abstract] Subsequent Events Subsequent Events [Text Block] PPR Portfolio Pacific Premier Retail LLC [Member] Pacific Premier Retail LLC [Member] Total assets Total liabilities Equity Method Investment, Summarized Financial Information, Liabilities Amortization of difference between cost of investments and book value of underlying equity Equity Method Investment, Amortization of Difference Between Carrying Amount and Underlying Equity The item represents the amortization during the period of the difference between the amount at which an investment accounted for under the equity method of accounting is carried (reported) on the balance sheet and the amount of underlying equity in net assets the reporting Entity has in the investee. Accounting Policies [Abstract] Summary of Significant Accounting Policies Basis of Presentation and Significant Accounting Policies [Text Block] Schedule of fees charged to unconsolidated joint ventures Schedule of Revenues from Unconsolidated Joint Ventures and Third Party Managed Properties [Table Text Block] Tabular disclosure of revenue derived from management, development and leasing fees charged to unconsolidated joint ventures and third-party managed properties. Real Estate [Abstract] Property, net Real Estate Disclosure [Text Block] Investment, Name [Axis] Investment, Name [Axis] Investment, Name [Domain] Investment, Name [Domain] PPR Portfolio Pacific Premier Retail LP [Member] Represents Pacific Premier Retail LP, a joint venture in which the entity has made investment. Other Joint Ventures Other Joint Ventures [Member] Represents other joint ventures in which the entity participates, not specifically identified. NML Northwestern Mutual Life [Member] Represents Northwestern Mutual Life ("NML"), considered a related party because it is a joint venture partner of the entity. Revenues: Revenues [Abstract] Leasing revenue Operating Lease, Lease Income Other Equity Method Investment, Summarized Financial Information, Other Revenue The sum of all other revenue and income for the period reported by an equity method investment of the entity. Total revenues Equity Method Investment, Summarized Financial Information, Revenue Expenses: Operating Expenses [Abstract] Shopping center and operating expenses Equity Method Investment, Summarized Financial Information, Cost of Real Estate Revenue This element represents the total of the costs related to real estate revenues reported for the period by an equity method investment of the entity. Leasing expenses Equity Method Investment, Summarized Financial Information, Leasing Expense Equity Method Investment, Summarized Financial Information, Leasing Expense Interest expense Equity Method Investment, Summarized Financial Information, Interest Expense The cost of borrowed funds accounted for as interest that was charged against earnings during the period by an equity method investment of the entity. Depreciation and amortization Equity Method Investment, Summarized Financial Information, Depreciation and Amortization The current period expense charged against earnings for depreciation and amortization on long-lived, physical assets not used in production, and which are not intended for resale, reported by an equity method investment of the entity. Total operating expenses Equity Method Investment, Summarized Financial Information, Operating Expenses Generally recurring costs associated with normal operations for the period reported by an equity method investment of the entity. (Loss) gain on sale or write down of assets, net Equity Method Investment, Summarized Financial Information, Gain (Loss) on Sale and Remeasurement of Assets Represents the amount of gain or loss resulting from either the difference between the carrying value and the sales price or remeasurement of the carrying value of assets during the period, reported by an equity method investment of the entity. Net (loss) income Equity Method Investment, Summarized Financial Information, Net Income (Loss) Company's equity in net (loss) income Income (Loss) from Equity Method Investments Interest expense on borrowings from related party Equity Method Investment, Summarized Financial Information, Interest Expense Related Party The amount of interest expense on a debt or other obligation to a related party reported by an equity method investment of the entity. Earnings Per Share [Abstract] Earnings per Share (EPS) Earnings Per Share [Text Block] Statement of Comprehensive Income [Abstract] Net income (loss) Net Income (Loss), Including Portion Attributable to Noncontrolling Interest Other comprehensive (loss) income: Comprehensive Income (Loss), Net of Tax, Including Portion Attributable to Noncontrolling Interest [Abstract] Interest rate cap/swap agreements Other Comprehensive Income (Loss), Unrealized Gain (Loss) on Derivatives Arising During Period, Net of Tax Comprehensive income (loss) Comprehensive Income (Loss), Net of Tax, Including Portion Attributable to Noncontrolling Interest Less net (loss) income attributable to noncontrolling interests Net Income (Loss) Attributable to Noncontrolling Interest Comprehensive income (loss) attributable to the Company Comprehensive Income (Loss), Net of Tax, Attributable to Parent Numerator Net Income (Loss) Available to Common Stockholders, Basic [Abstract] Net income (loss) Income (Loss) from Continuing Operations, Net of Tax, Including Portion Attributable to Noncontrolling Interest Net income (loss) attributable to the Company Net Income (Loss) Available to Common Stockholders, Basic Allocation of earnings to participating securities Undistributed Earnings (Loss) Allocated to Participating Securities, Basic and Diluted Undistributed Earnings (Loss) Allocated to Participating Securities, Basic and Diluted Numerator for basic and diluted EPS—net income attributable to common stockholders Net Income (Loss) Available to Common Stockholders after Allocation to Participating Securities, Basic and Diluted Net Income (Loss) Available to Common Stockholders after Allocation to Participating Securities, Basic and Diluted Denominator Weighted Average Number of Shares Outstanding, Diluted [Abstract] Weighted Average Number of Shares Outstanding, Diluted Weighted Average Number of Shares Outstanding, Diluted EPS—net income (loss) attributable to common stockholders: Earnings Per Share, Basic and Diluted [Abstract] Basic (in dollars per share) Earnings Per Share, Basic Diluted (in dollars per share) Earnings Per Share, Diluted 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] Convertible non-participating preferred units Preferred Nonparticipating Convertible Units [Member] Represents convertible non-participating units or equivalent units of ownership interest in an LLC or LP. Partnership unit Partnership Units [Member] Represents units or equivalent units of ownership interest in an LLC or LP. Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items] Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items] Securities excluded from Diluted EPS (in shares) Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount Mortgage Notes Payable Mortgage Notes Payable Disclosure [Text Block] Unconsolidated Joint Ventures Unconsolidated Joint Ventures [Member] Represents unconsolidated joint ventures. Affiliated Entity Affiliated Entity [Member] Receivable Type [Axis] Receivable Type [Axis] Receivable Type [Domain] Receivable [Domain] Related parties note receivable, RED Consolidated Holdings, LLC Related Parties Note Receivable, RED Consolidated Holdings, LLC [Member] Related Parties Note Receivable, RED Consolidated Holdings, LLC [Member] Notes Receivable Notes Receivable [Member] Fashion Outlets of San Francisco Fashion Outlets of San Francisco [Member] Fashion Outlets of San Francisco [Member] Variable Rate [Axis] Variable Rate [Axis] Variable Rate [Domain] Variable Rate [Domain] LIBOR London Interbank Offered Rate (LIBOR) [Member] Interest expense, related party Related Party Transaction, Expenses from Transactions with Related Party Related parties Interest Income (Expense), Related Party Interest Income (Expense), Related Party Due from affiliates Due from Affiliates Note receivable, interest rate Notes Receivable Interest Rate The stated interest rate on the note receivable. Interest income, related party Interest Income, Related Party Note receivable Notes Receivable, Related Parties Leases [Abstract] Operating Leases Operating Lease Liabilities, Payments Due [Abstract] 2019 Lessee, Operating Lease, Liability, Payments, Due Next Twelve Months 2020 Lessee, Operating Lease, Liability, Payments, Due Year Two 2021 Lessee, Operating Lease, Liability, Payments, Due Year Three 2022 Lessee, Operating Lease, Liability, Payments, Due Year Four 2023 Lessee, Operating Lease, Liability, Payments, Due Year Five Thereafter Lessee, Operating Lease, Liability, Payments, Due after Year Five Total undiscounted rental payments Lessee, Operating Lease, Liability, Payments, Due Less imputed interest Lessee, Operating Lease, Liability, Undiscounted Excess Amount Lease liabilities Operating Lease, Liability Operating Leases Leases, Operating [Abstract] 2019 Operating Leases, Future Minimum Payments, Remainder of Fiscal Year 2020 Operating Leases, Future Minimum Payments, Due in Two Years 2021 Operating Leases, Future Minimum Payments, Due in Three Years 2022 Operating Leases, Future Minimum Payments, Due in Four Years 2023 Operating Leases, Future Minimum Payments, Due in Five Years Thereafter Operating Leases, Future Minimum Payments, Due Thereafter Total undiscounted rental payments Operating Leases, Future Minimum Payments Due Finance Leases Finance Lease Liabilities, Payments, Due [Abstract] 2020 Finance Lease, Liability, Payments, Remainder of Fiscal Year 2021 Finance Lease, Liability, Payments, Due Year Two 2022 Finance Lease, Liability, Payments, Due Year Three 2023 Finance Lease, Liability, Payments, Due Year Four 2024 Finance Lease, Liability, Payments, Due Year Five Thereafter Finance Lease, Liability, Payments, Due after Year Five Total undiscounted rental payments Finance Lease, Liability, Payments, Due Less imputed interest Finance Lease, Liability, Undiscounted Excess Amount Total lease liabilities Finance Lease, Liability Finance Leases Leases, Capital [Abstract] 2019 Capital Leases, Future Minimum Payments, Remainder of Fiscal Year 2020 Capital Leases, Future Minimum Payments Due in Two Years 2021 Capital Leases, Future Minimum Payments Due in Three Years 2022 Capital Leases, Future Minimum Payments Due in Four Years 2023 Capital Leases, Future Minimum Payments Due in Five Years Thereafter Capital Leases, Future Minimum Payments Due Thereafter Total undiscounted rental payments Capital Leases, Future Minimum Payments Due Statement of Financial Position [Abstract] Common stock, shares authorized Common Stock, Shares Authorized Common stock, shares issued Common Stock, Shares, Issued Common Stock, shares outstanding Common Stock, Shares, Outstanding 2020 Lessor, Operating Lease, Payments to be Received, Next Rolling Twelve Months 2021 Lessor, Operating Lease, Payments to be Received, Rolling Year Two 2022 Lessor, Operating Lease, Payments to be Received, Rolling Year Three 2023 Lessor, Operating Lease, Payments to be Received, Rolling Year Four 2024 Lessor, Operating Lease, Payments to be Received, Rolling Year Five Thereafter Lessor, Operating Lease, Payments to be Received, after Rolling Year Five Total minimum rental payments Lessor, Operating Lease, Payments to be Received Derivative Instruments and Hedging Activities Disclosure [Abstract] Fair Values Derivatives, Balance Sheet Location, by Derivative Contract Type [Table] Fair Values Derivatives, Balance Sheet Location, by Derivative Contract Type [Table] Fair Value Hierarchy and NAV [Axis] Fair Value Hierarchy and NAV [Axis] Fair Value Hierarchy and NAV [Domain] Fair Value Hierarchy and NAV [Domain] Level 2 measurement Fair Value, Inputs, Level 2 [Member] Derivative Instrument [Axis] Derivative Instrument [Axis] Derivative Contract [Domain] Derivative Contract [Domain] Cap Interest Rate Cap [Member] Swaps Interest Rate Swap [Member] Derivatives, Fair Value [Line Items] Derivatives, Fair Value [Line Items] Notional Amount Derivative, Notional Amount LIBOR Rate Derivative, Variable Interest Rate 6/30/2019 Derivative, Fair Value, Net Schedule of Long-term Debt Instruments [Table] Schedule of Long-term Debt Instruments [Table] Danbury Fair Mall Danbury Fair Mall Mortgage [Member] Mortgage note payable on the Danbury Fair Mall property pledged as collateral. Fashion Outlets of Chicago Fashion Outlets of Chicago Mortgage [Member] Mortgage note payable on the Fashion Outlets of Chicago property pledged as collateral. Fashion Outlets of Niagara Falls USA Fashion Outlets at Niagara Mortgage [Member] Mortgage note payable on the Fashion Outlets at Niagara pledged as collateral, bearing interest at 6.46 percent and maturing in 2016. Freehold Raceway Mall Freehold Raceway Mall Mortgage [Member] Mortgage note payable on the Freehold Raceway Mall property pledged as collateral. Fresno Fashion Fair Fresno Fashion Fair [Member] Represents the information pertaining to real estate property of the entity, Fresno Fashion Fair. Green Acres Commons Green Acres Commons [Member] Green Acres Commons [Member] Green Acres Mall Green Acres Mall Mortgage [Member] Green Acres Mall Mortgage [Member] Kings Plaza Shopping Center Kings Plaza Mortgage [Member] Mortgage note payable on the Kings Plaza property pledged as collateral. Oaks, The The Oaks One Mortgage [Member] Mortgage note payable on the Oaks property pledged as collateral. Pacific View Pacific View Mortgage [Member] Mortgage note payable on the Pacific View property pledged as collateral. Queens Center Queens Center [Member] Represents the joint venture, Queens Center. Santa Monica Place Santa Monica Place Mortgage [Member] Mortgage note payable on Santa Monica Place property pledged as collateral. SanTan Village Regional Center San Tan Village Regional Center Mortgage [Member] Mortgage note payable on the SanTan Village Regional Center property pledged as collateral. Towne Mall Towne Mall Mortgage [Member] Mortgage note payable on the Towne Mall property pledged as collateral. Tucson La Encantada Tucson La Encantada Mortgage [Member] Mortgage note payable on the Tucson La Encantada property pledged as collateral. Victor Valley, Mall of Mall of Victor Valley Mortgage [Member] Mortgage note payable on the Mall of Victor Valley property pledged as collateral. Vintage Faire Mall Vintage Faire Mall Mortgage [Member] Mortgage note payable on the Vintage Faire Mall property pledged as collateral. Mortgage loans payable on real estate Debt Instrument [Line Items] Carrying Amount of Mortgage Notes, Other Secured Debt Nonrelated Party Carrying value as of the balance sheet date, including the current and noncurrent portions, of collateralized debt obligations such as mortgage loans. Effective Interest Rate Debt Instrument, Interest Rate, Effective Percentage Monthly Debt Service Debt Instrument, Periodic Payment Deferred Costs, Capitalized, Prepaid, and Other Assets Disclosure [Abstract] Schedule of Acquired Finite-Lived Intangible Asset by Major Class [Table] Schedule of Acquired Finite-Lived Intangible Asset by Major Class [Table] Finite-Lived Intangible Assets by Major Class [Axis] Finite-Lived Intangible Assets by Major Class [Axis] Finite-Lived Intangible Assets, Major Class Name [Domain] Finite-Lived Intangible Assets, Major Class Name [Domain] Above-Market Leases Above Market Leases [Member] Below-Market Leases Below Market Lease [Member] Below Market Lease [Member] Allocated values of leases Acquired Finite-Lived Intangible Assets [Line Items] Above-Market Leases Above Market Leases [Abstract] Above Market Leases [Abstract] Original allocated value Finite-Lived Intangible Assets, Gross Less accumulated amortization Finite-Lived Intangible Assets, Accumulated Amortization Allocated value net Finite-Lived Intangible Assets, Net Below-Market Leases Below Market Lease [Abstract] Original allocated value Below Market Lease, Gross Less accumulated amortization Below Market Lease, Accumulated Amortization Allocated value net Below Market Lease, Net Basis of Presentation Basis of Accounting, Policy [Policy Text Block] Adoption of New Lease Standard New Accounting Pronouncements, Policy [Policy Text Block] Noncontrolling Interests Noncontrolling Interest Disclosure [Text Block] Statement of Cash Flows [Abstract] Cash flows from operating activities: Net Cash Provided by (Used in) Operating Activities [Abstract] Net income (loss) Adjustments to reconcile net income (loss) to net cash provided by operating activities: Adjustments to Reconcile Net Income (Loss) to Cash Provided by (Used in) Operating Activities [Abstract] Loss on extinguishment of debt, net Gain (Loss) on Extinguishment of Debt Loss on sale or write down of assets, net Gain (Loss) on Sale or Write Down of Assets Gain (Loss) on Sale or Write Down of Assets Depreciation and amortization Depreciation, Depletion and Amortization Amortization of premium on mortgage notes payable Amortization of Debt Discount (Premium) Amortization of share and unit-based plans Share-based Compensation Straight-line rent and amortization of above and below market leases Straight Line Rent Adjustments and Amortization of above and below Market Leases Straight Line Rent Adjustments and Amortization of above and below Market Leases Provision for doubtful accounts Provision for Doubtful Accounts Income tax expense (benefit) Income Tax Expense (Benefit) Equity in income of unconsolidated joint ventures Distributions of income from unconsolidated joint ventures Proceeds from Equity Method Investment, Distribution Change in fair value of financing arrangement obligation Liabilities, Fair Value Adjustment Changes in assets and liabilities, net of dispositions: Increase (Decrease) in Operating Capital [Abstract] Tenant and other receivables Increase (Decrease) in Accounts Receivable Other assets Increase (Decrease) in Other Operating Assets Due from affiliates Increase (Decrease) Due from Affiliates Accounts payable and accrued expenses Increase (Decrease) in Accounts Payable and Accrued Liabilities Other accrued liabilities Increase (Decrease) in Other Accrued Liabilities Net cash provided by operating activities Net Cash Provided by (Used in) Operating Activities Cash flows from investing activities: Net Cash Provided by (Used in) Investing Activities [Abstract] Development, redevelopment, expansion and renovation of properties Payments to Acquire and Develop Real Estate Property improvements Payments to Develop Real Estate Assets Proceeds from repayment of notes receivable Proceeds from Collection of Notes Receivable Deferred leasing costs Increase (Decrease) in Deferred Leasing Fees Distributions from unconsolidated joint ventures Distributions of Capital from Unconsolidated Entities and Other Cash inflows from unconsolidated entities and other. Contributions to unconsolidated joint ventures Payments to Acquire Interest in Joint Venture Proceeds from sale of assets Proceeds from Sale of Partnership Interests Other Assets and Discontinued Operations, Net Cash inflows from the sale of partnership interests, other assets, and discontinued operations. Net cash (used in) provided by investing activities Net Cash Provided by (Used in) Investing Activities Cash flows from financing activities: Net Cash Provided by (Used in) Financing Activities [Abstract] Proceeds from mortgages, bank and other notes payable Proceeds from Issuance of Long-term Debt and Capital Securities, Net Payments on mortgages, bank and other notes payable Repayments of Long-term Debt, Long-term Capital Lease Obligations, and Capital Securities Payment on finance arrangement obligation Deferred financing costs Payments of Financing Costs Payments on finance leases Finance Lease, Principal Payments Proceeds from share and unit-based plans Proceeds from Stock Plans Redemption of noncontrolling interests Payments to Noncontrolling Interests Contribution from noncontrolling interests Proceeds from Noncontrolling Interests Dividends and distributions Payments of Ordinary Dividends, Common Stock Net cash used in financing activities Net Cash Provided by (Used in) Financing Activities Net decrease 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, beginning of period Cash, Cash Equivalents, Restricted Cash and Restricted Cash Equivalents Cash, cash equivalents and restricted cash, end of period Supplemental cash flow information: Supplemental Cash Flow Information [Abstract] Cash payments for interest, net of amounts capitalized Interest Paid, Excluding Capitalized Interest, Operating Activities Non-cash investing and financing transactions: Cash Flow, Noncash Investing and Financing Activities Disclosure [Abstract] Accrued development costs included in accounts payable and accrued expenses and other accrued liabilities Construction in Progress Expenditures Incurred but Not yet Paid Conversion of Operating Partnership Units to common stock Conversion of Stock, Amount Converted Leasing Deferred Costs, Leasing, Gross Intangible assets: Finite-Lived Intangible Assets, Gross [Abstract] In-place lease values Finite-Lived Intangible Asset, Acquired-in-Place Leases Leasing commissions and legal costs Finite-lived Intangible Asset Leasing Commissions and Legal Costs Gross carrying amount before accumulated amortization as of the balance sheet date of capitalized leasing commissions and lease-related legal costs. Above-market leases Finite Lived Intangible Asset above Market Leases Gross carrying amount before accumulated amortization as of the balance sheet date of the intangible asset for leases acquired as part of a real property acquisition at above market lease rate. Deferred tax assets Deferred Tax Assets, Net Deferred compensation plan assets Deferred Compensation Plan Assets Other assets Other Assets, Miscellaneous Deferred charges and other assets, gross Deferred Costs and Other Assets, Gross Sum of the gross carrying amounts before accumulated amortization of deferred costs that are expected to be recognized as a charge against future earnings plus assets not otherwise specified in the taxonomy. Less accumulated amortization Accumulated Amortization Deferred Costs and Finite-lived Intangible Assets The accumulated amount of amortization related to deferred costs capitalized at the end of the reporting period and finite-lived intangible assets. Deferred charges and other assets, net Deferred Costs and Other Assets Schedule of Finite-Lived Intangible Assets [Table] Schedule of Finite-Lived Intangible Assets [Table] In-place lease values, leasing commissions and legal costs Leases, Acquired-in-Place [Member] Finite-Lived Intangible Assets [Line Items] Finite-Lived Intangible Assets [Line Items] Accumulated amortization for intangible assets Amortization expense for intangible assets Amortization of Intangible Assets Finance Lease, Number of Leases Finance Lease, Number of Leases Finance Lease, Number of Leases Operating Lease, Weighted Average Discount Rate, Percent Operating Lease, Weighted Average Remaining Lease Term Finance Lease, Weighted Average Remaining Lease Term Finance Lease, Weighted Average Remaining Lease Term Operating Lease, Weighted Average Discount Rate, Percent Operating Lease, Weighted Average Discount Rate, Percent Finance Lease, Weighted Average Discount Rate, Percent Finance Lease, Weighted Average Discount Rate, Percent Cover page. Document Type Document Type Document Quarterly Report Document Quarterly Report Document Period End Date Document Period End Date Document Transition Report Document Transition Report Entity File Number Entity File Number Entity Registrant Name Entity Registrant Name Entity Incorporation, State or Country Code Entity Incorporation, State or Country Code Entity Tax Identification Number Entity Tax Identification Number Entity Address, Address Line One Entity Address, Address Line One Entity Address, Address Line Two Entity Address, Address Line Two Entity Address, City or Town Entity Address, City or Town Entity Address, State or Province Entity Address, State or Province Entity Address, Postal Zip Code Entity Address, Postal Zip Code City Area Code City Area Code Local Phone Number Local Phone Number Title of 12(b) Security Title of 12(b) Security Trading Symbol Trading Symbol Security Exchange Name Security Exchange Name Entity Current Reporting Status Entity Current Reporting Status Entity Interactive Data Current Entity Interactive Data Current Entity Filer Category Entity Filer Category Entity Small Business Entity Small Business Entity Emerging Growth Company Entity Emerging Growth Company Entity Shell Company Entity Shell Company 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 Entity Central Index Key Entity Central Index Key Amendment Flag Amendment Flag Current Fiscal Year End Date Current Fiscal Year End Date Income Taxes Income Tax Disclosure [Text Block] Stock options Compensation cost under share and unit-based plans Allocated Share-based Compensation Expense Investments in Unconsolidated Joint Ventures Equity Method Investments and Joint Ventures Disclosure [Text Block] Components of leasing revenue Operating Lease, Lease Income [Table Text Block] Summary of minimum rental payments Lessor, Operating Lease, Payments to be Received, Maturity [Table Text Block] Summary of lease costs Lease, Cost [Table Text Block] Summarizes of minimum future rental payments required Lessee, Operating Lease, Liability, Maturity [Table Text Block] Contingent liability under letters of credit Letters of Credit Outstanding, Amount Outstanding obligations under construction agreements Construction Payable, Current Land Land Buildings and improvements Investment Building and Building Improvements Tenant improvements Tenant Improvements Equipment and furnishings(1) Fixtures and Equipment, Gross Construction in progress Development in Process Total Real Estate Investment Property, at Cost Less accumulated depreciation(1) Real Estate Investment Property, Accumulated Depreciation Property, net Real Estate Investment Property, Net 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] Fair value measurements on a nonrecurring basis Fair Value, Measurements, Nonrecurring [Member] Quoted Prices in Active Markets for Identical Assets (Level 1) Fair Value, Inputs, Level 1 [Member] Significant Other Unobservable Inputs (Level 2) Significant Unobservable Inputs (Level 3) Fair Value, Inputs, Level 3 [Member] Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] Assets Assets, Fair Value Disclosure Credit Facility [Axis] Credit Facility [Axis] Credit Facility [Domain] Credit Facility [Domain] Revolving line of credit Revolving Credit Facility [Member] Low end of range High end of range Debt Instrument [Axis] Debt Instrument [Axis] Debt Instrument, Name [Domain] Debt Instrument, Name [Domain] Line of Credit Line of Credit [Member] Prasada Note Prasada Note [Member] Prasada Note [Member] Revolving line of credit Line of Credit Facility, Maximum Borrowing Capacity Interest rate spread over basis Debt Instrument, Basis Spread on Variable Rate Number of agreements Derivative, Number of Instruments Held Extension option (years) Line of Credit Facility, Term of Extension Option The term of the extension option on the credit facility. Maximum contingent borrowing capacity Line of Credit Facility, Maximum Contingent Borrowing Capacity Line of Credit Facility, Maximum Contingent Borrowing Capacity Outstanding borrowings under the line of credit Long-term Line of Credit Effective interest rate Derivative, Swaption Interest Rate Unamortized deferred finance costs Debt Issuance Costs, Net Line of credit, average interest rate Line of Credit Facility, Interest Rate During Period Availability for additional borrowing Line of Credit Facility, Remaining Borrowing Capacity Fair value of outstanding line of credit Line of Credit Facility, Fair Value of Amount Outstanding Amount of additional borrowing Proceeds from Issuance of Debt Interest rate on debt Debt Instrument, Interest Rate, Stated Percentage Debt, carrying value Long-term Debt, Gross Debt, fair value Debt Instrument, Fair Value Disclosure Income Statement [Abstract] Statement [Table] Statement [Table] Other Real Estate, Other [Member] Management Companies' operating expenses Shopping center and operating expenses Real Estate [Member] Statement [Line Items] Statement [Line Items] Revenues: Leasing revenue Operating Leases, Income Statement, Lease Revenue Total revenues Revenues Expenses: Costs and Expenses [Abstract] Operating expenses Cost of Goods and Services Sold Leasing expenses Operating Lease, Initial Direct Cost Expense, over Term Leasing expenses Operating Leases, Income Statement, Initial Direct Costs REIT general and administrative expenses General and Administrative Expense Costs related to shareholder activism Unsolicited Tender Offer Costs Depreciation and amortization Depreciation, Depletion and Amortization, Nonproduction Total expenses before interest Costs and Expenses before Interest, Total The sum of all costs of sales and operating expenses, excluding interest expense, for the period. Interest (income) expense: Interest Expense [Abstract] Other Interest Expense, Other Total interest expense Interest Expense Loss on extinguishment of debt, net Gains (Losses) on Extinguishment of Debt, Including Penalties Gains (Losses) on Extinguishment of Debt, Including Penalties Total expenses Costs and Expenses Equity in income of unconsolidated joint ventures Income tax (expense) benefit Loss on sale or write down of assets, net Gain (Loss) on Sale of Assets and Asset Impairment Charges Net income (loss) Earnings per common share—attributable to common stockholders: Weighted average number of common shares outstanding: Basic (in shares) Weighted Average Number of Shares Outstanding, Basic Diluted (in shares) Components of property Schedule of Real Estate Properties [Table Text Block] Assets measured on a nonrecurring basis Fair Value Measurements, Nonrecurring [Table Text Block] Schedule of variable interest entities Schedule of Variable Interest Entities [Table Text Block] Schedule of Cash and Cash Equivalents Schedule of Cash and Cash Equivalents [Table Text Block] Schedule of Variable Interest Entities [Table] Schedule of Variable Interest Entities [Table] Variable Interest Entities [Axis] Variable Interest Entities [Axis] Variable Interest Entity, Classification [Domain] Variable Interest Entity, Classification [Domain] Operating Partnership Variable Interest Entity, Primary Beneficiary [Member] Balance Sheet Location [Axis] Balance Sheet Location [Axis] Balance Sheet Location [Domain] Balance Sheet Location [Domain] Property, net Real Estate Investment Property, Net [Member] Real Estate Investment Property, Net [Member] Other assets Other Assets [Member] Mortgage notes payable Secured Debt [Member] Other liabilities Other Liabilities [Member] Variable Interest Entity [Line Items] Variable Interest Entity [Line Items] Total assets Variable Interest Entity, Consolidated, Carrying Amount, Assets Total liabilities Variable Interest Entity, Consolidated, Carrying Amount, Liabilities Discontinued Operations and Disposal Groups [Abstract] Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Table] Disposal Groups, Including Discontinued Operations [Table] Disposal Group Name [Axis] Disposal Group Name [Axis] Disposal Group Name [Domain] Disposal Group Name [Domain] Promenade at Casa Grande Promenade at Casa Grande [Member] Represents the information pertaining to real estate property of the entity, Promenade at Casa Grande. Discontinued Operations: Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items] Loss on sale of assets Combined and condensed balance sheets of unconsolidated joint ventures Equity Method Investments, Summarized Financial Information Balance Sheet [Table Text Block] Disclosure of summarized balance sheet financial information for investments accounted for using the equity method of accounting. Combined and condensed statements of operations of unconsolidated joint ventures Equity Method Investments, Summarized Financial Information Statement of Operations [Table Text Block] Disclosure of summarized statement of operations information for investments accounted for using the equity method of accounting. Related Party Transactions Related Party Transactions Disclosure [Text Block] Debt premiums Debt Instrument, Unamortized Premium Percentage of loan assumed by third party Percentage of Loan Assumed by Third Party Portion of the loan assumed by a third party. New loan Effective interest rate Interest rate on debt, term Debt Instrument, Interest Rate, Stated Percentage, Term Debt Instrument, Interest Rate, Stated Percentage, Term Distributions of the partner's share of net income Income (Loss) from Joint Venture Income (Loss) from Joint Venture Distributions in excess of the partner's share of net income Joint Venture, Distributions in Excess of Partner Share of Income (Loss) Joint Venture, Distributions in Excess of Partner Share of Income (Loss) Adjustment to fair value of financing arrangement obligation Fair Value Adjustment of Finance Obligation Fair Value Adjustment of Finance Obligation Interest income (expense) Statement of Stockholders' Equity [Abstract] Equity Components [Axis] Equity Components [Axis] Equity Component [Domain] Equity Component [Domain] Total Stockholders' Equity Parent [Member] Common Stock Common Stock [Member] Additional Paid-in Capital Additional Paid-in Capital [Member] Accumulated Deficit Retained Earnings [Member] Accumulated Other Comprehensive Loss AOCI Attributable to Parent [Member] Noncontrolling Interests Noncontrolling Interest [Member] Increase (Decrease) in Stockholders' Equity Increase (Decrease) in Stockholders' Equity [Roll Forward] Beginning balance (in shares) Beginning balance Stockholders' Equity, Including Portion Attributable to Noncontrolling Interest Cumulative effect of adoption of ASC 842 Cumulative Effect of New Accounting Principle in Period of Adoption Amortization of share and unit-based plans (in shares) Stock Issued During Period, Shares, Share-based Compensation, Net of Forfeitures Amortization of share and unit-based plans Stock Issued During Period, Value, Share-based Compensation, Net of Forfeitures Employee stock purchases (in shares) Stock Issued During Period, Shares, Employee Stock Purchase Plans Employee stock purchases Stock Issued During Period, Value, Employee Stock Purchase Plan Distributions declared Dividends, Common Stock, Cash Distributions to noncontrolling interests Noncontrolling Interest, Decrease from Distributions to Noncontrolling Interest Holders Contributions from noncontrolling interests Noncontrolling Interest, Increase from Contributions from Noncontrolling Interests Noncontrolling Interest, Increase from Contributions from Noncontrolling Interests Conversion of noncontrolling interests to common shares (in shares) Stock Issued During Period, Shares, Conversion of Units Conversion of noncontrolling interests to common shares Stock Issued During Period, Value, Conversion of Units Redemption of noncontrolling interests Noncontrolling Interest, Decrease from Redemptions or Purchase of Interests Adjustment of noncontrolling interests in Operating Partnership Noncontrolling Interest, Increase from Subsidiary Equity Issuance Ending balance (in shares) Ending balance Current Current Income Tax Expense (Benefit) Deferred Deferred Income Tax Expense (Benefit) Total income tax (expense) benefit Net deferred tax assets Share and Unit-Based Plans Disclosure of Compensation Related Costs, Share-based Payments [Text Block] Schedule of derivative instruments Schedule of Derivative Instruments [Table Text Block] Depreciation expense Depreciation, Nonproduction Property, Plant and Equipment [Table] Property, Plant and Equipment [Table] Two freestanding stores Two Freestanding Store [Member] Two Freestanding Store [Member] Southridge Center Southridge Center [Member] Southridge Center [Member] South Park Mall South Park Mall [Member] Represents the information pertaining to real estate property of the entity, South Park Mall. Property, Plant and Equipment [Line Items] Property, Plant and Equipment [Line Items] Write down of development costs Write-off of Development Cost Represents the development cost written off during the period. Impairment loss Impairment of Real Estate Gain (loss) on disposal Disposal Group, Not Discontinued Operation, Gain (Loss) on Disposal Subsequent Event [Table] Subsequent Event [Table] Subsequent Event Type [Axis] Subsequent Event Type [Axis] Subsequent Event Type [Domain] Subsequent Event Type [Domain] Subsequent event Subsequent Event [Member] Fashion District Philadelphia Fashion District Philadelphia [Member] Fashion District Philadelphia [Member] Subsequent events Subsequent Event [Line Items] Dividend declared (in dollars per share) Common Stock, Dividends, Per Share, Declared Additional borrowings Note Payable, Maximum Additional Borrowing Note Payable, Maximum Additional Borrowing Cash and cash equivalents Cash and Cash Equivalents, at Carrying Value Restricted cash Restricted Cash, Current Cash, cash equivalents and restricted cash Collaborative Arrangement Leases Lessee, Finance Leases [Text Block] Leases Lessor, Operating Leases [Text Block] Stockholders' Equity Note [Abstract] Authorized repurchase amount Stock Repurchase Program, Authorized Amount Remaining authorized repurchase amount Stock Repurchase Program, Remaining Authorized Repurchase Amount Operating lease costs Operating Lease, Cost Finance lease costs: Finance Lease, Cost [Abstract] Amortization of ROU assets Finance Lease, Right-of-Use Asset, Amortization Interest on lease liabilities Finance Lease, Interest Expense Total lease costs Lease, Cost Stockholders' Equity Stockholders' Equity Note Disclosure [Text Block] Leasing revenue - fixed payments Operating Lease, Lease Income, Lease Payments Leasing revenue - fixed payments Operating Leases, Income Statement, Minimum Lease Revenue Leasing revenue - variable payments Variable Lease, Income Leasing revenue - variable payments Operating Leases, Income Statement, Contingent Revenue Leasing revenue Lease Income Leasing revenue Allowance for doubtful accounts Allowance for Doubtful Accounts, Premiums and Other Receivables Schedule of Accounts, Notes, Loans and Financing Receivable [Table] Schedule of Accounts, Notes, Loans and Financing Receivable [Table] Accrued percentage rents Accrued Income Receivable [Member] Components of tenant and other receivables, net Accounts, Notes, Loans and Financing Receivable [Line Items] Accounts receivable Accounts Receivable, Gross Deferred rent receivable due to straight-line rent adjustments Deferred Rent Receivables, Net Deferred Charges and Other Assets, net Other Assets Disclosure [Text Block] Dispositions Disposal Groups, Including Discontinued Operations, Disclosure [Text Block] Distributions declared, per share (in dollars per share) Common Stock, Dividends, Per Share, Cash Paid ASSETS: Property, net Tenant and other receivables, net Accounts and Notes Receivable, Net Right-of-use assets, net Operating Lease, Right-of-Use Asset Deferred charges and other assets, net Investments in unconsolidated joint ventures Total assets Assets LIABILITIES AND EQUITY: Mortgage notes payable Secured Debt Bank and other notes payable Convertible Debt, Line of Credit and Other Notes Payable Includes the current and noncurrent portions, carrying amount of debut identified as being convertible into another form of financial instrument, the carrying values of obligations drawn from a line of credit, and other notes payable. Accounts payable and accrued expenses Accounts Payable and Accrued Liabilities Lease liabilities Operating and Finance Lease, Liability Operating and Finance Lease, Liability Other accrued liabilities Other Accrued Liabilities Distributions in excess of investments in unconsolidated joint ventures Financing arrangement obligation Financing Arrangement Obligation Financing Arrangement Obligation Total liabilities Liabilities Commitments and contingencies Commitments and Contingencies Equity: Stockholders' Equity, Including Portion Attributable to Noncontrolling Interest [Abstract] Stockholders' equity: Stockholders' Equity Attributable to Parent [Abstract] Common stock, $0.01 par value, 250,000,000 shares authorized, 141,364,568 and 141,221,712 shares issued and outstanding at June 30, 2019 and December 31, 2018, respectively Common Stock, Value, Issued Additional paid-in capital Additional Paid in Capital, Common Stock Accumulated deficit Retained Earnings (Accumulated Deficit) Accumulated other comprehensive loss Accumulated Other Comprehensive Income (Loss), Net of Tax Total stockholders' equity Stockholders' Equity Attributable to Parent Noncontrolling interests Stockholders' Equity Attributable to Noncontrolling Interest Total equity Total liabilities and equity Liabilities and Equity Award Date [Axis] Award Date [Axis] Award Date [Domain] Award Date [Domain] 1/1/2019 January 1, 2018 [Member] January 1, 2018 [Member] Service-based Long Term Incentive Plan, Service-based [Member] Long Term Incentive Plan, Service-based [Member] Vesting [Axis] Vesting [Axis] Vesting [Domain] Vesting [Domain] First vesting period Share-based Compensation Award, Tranche One [Member] Granted (in shares) Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period Average grant date fair value (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 Derivative Instruments and Hedging Activities Derivative Instruments and Hedging Activities Disclosure [Text Block] Financing arrangement activity Financing Arrangement [Table Text Block] Financing Arrangement [Table Text Block] Collateral [Axis] Collateral [Axis] Collateral [Domain] Collateral [Domain] Replacement collateral Collateral Pledged [Member] Westcor/Queen Creek LLC Westcor/Queen Creek LLC [Member] Represents the joint venture, Westcor/Queen Creek LLC. The Market at Estrella Falls The Market at Estrella Falls [Member] Represents the joint venture, The Market at Estrella Falls LLC. Real Estate, Type of Property [Axis] Real Estate, Type of Property [Axis] Real Estate [Domain] Real Estate [Domain] Office building Office Building [Member] Land Land [Member] Los Angeles Premium Outlets Los Angeles Premium Outlets [Member] Los Angeles Premium Outlets [Member] Los Angeles Premium Outlets, second stage Los Angeles Premium Outlets, Second Stage [Member] Los Angeles Premium Outlets, Second Stage [Member] Proceeds from sale of building Proceeds from Sale of Buildings Gain on sale of building Gain (Loss) on Sale of Properties Proceeds received in disposition of property Noncash or Part Noncash Divestiture, Amount of Consideration Received Assumption of mortgage notes payable Proceeds from Divestiture of Business, Assumption of Debt Proceeds from Divestiture of Business, Assumption of Debt Marketable Securities Marketable Securities Proceeds from sale Proceeds from Sale of Real Estate Repayments of debt Repayments of Secured Debt Schedule of deferred charges and other assets, net Schedule of Other Assets [Table Text Block] Allocated values of above-market leases and below-market leases Schedule of Acquired Finite-Lived Intangible Assets by Major Class [Table Text Block] Debt Instrument [Line Items] Recourse mortgage notes Recourse Debt Recourse Debt Interest expense capitalized Interest Costs Capitalized Fair value of mortgage notes payable Notes Payable, Fair Value Disclosure 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] ASU 2016-02 Accounting Standards Update 2016-02 [Member] New Accounting Pronouncements or Change in Accounting Principle [Line Items] New Accounting Pronouncements or Change in Accounting Principle [Line Items] ROU assets Leasing liabilities Deferred charges and other assets, net Finance lease liabilities Reconciliation of numerator and denominator used in computation of earnings per share Schedule of Earnings Per Share, Basic and Diluted [Table Text Block] Phantom Stock Units Stock Units Units Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Number of Shares [Roll Forward] Balance at beginning of period (in shares) Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Number 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 Balance at end of period (in shares) Value Share Based Compensation Arrangement by Share Based Payment Award Equity Instruments other than Options Weighted Average Exercise Price [Roll forward] -- None. No documentation exists for this element. -- Balance at beginning of 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) 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 Balance at end of period (in dollars per share) Mortgage notes payable Schedule of Mortgage Notes Payable [Table Text Block] Tabular disclosure of details related to mortgage notes payable by the entity, including properties which are pledged as collateral, carrying amounts, maturities and interest rates.