Buildings and improvements Investment Building and Building Improvements Financing Arrangement Co-venture Arrangement Disclosure [Text Block] This text block represents complete disclosure with respect to co-venture arrangements. Derivative Instruments and Hedging Activities Disclosure [Abstract] Derivative Instruments and Hedging Activities Disclosure [Abstract] Hudson Pacific Properties Hudson Pacific Properties [Member] Hudson Pacific Properties Par value of common stock (in dollars per share) Common Stock, Par or Stated Value Per Share Distributions of income from unconsolidated joint ventures Proceeds from Equity Method Investment, Distribution Antidilutive Securities [Axis] Antidilutive Securities [Axis] Due from affiliates Due (to) from affiliates Due from Affiliates Legal Entity [Axis] Legal Entity [Axis] Unrecognized compensation cost of share and unit-based plans Share-based Payment Arrangement, Nonvested Award, Cost Not yet Recognized, Amount Cascade Mall Cascade Mall [Member] Cascade Mall [Member] Combined and Condensed Balance Sheets of Unconsolidated Joint Ventures and Other Related Information 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. Accrued development costs included in accounts payable and accrued expenses and other accrued liabilities Construction in Progress Expenditures Incurred but Not yet Paid 2024 Lessee, Operating Lease, Liability, Payments, Due Year Five Remeasured ending deferred tax asset Tax Cuts and Jobs Act of 2017, Change in Tax Rate, Deferred Tax Asset, Income Tax Expense (Benefit) Tax Cuts and Jobs Act of 2017, Change in Tax Rate, Deferred Tax Asset, Income Tax Expense (Benefit) Weighted Average Exercise Price (in dollars per share) Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Weighted Average Exercise Price [Abstract] Granted (shares) Share-based Compensation Arrangement by Share-based Payment Award, Options, Grants in Period, Net of Forfeitures Conversion of Operating Partnership Units to common stock Conversion of Stock, Amount Converted Schedule III-Real Estate and Accumulated Depreciation Disclosure SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation Disclosure [Text Block] Other assets Increase (Decrease) in Other Operating Assets Other Interest Expense, Other 2021 Below Market Lease, Amortization Income, Year Three Accrued percentage rents Accrued Income Receivable [Member] Macerich HHF Broadway Plaza LLC—Broadway Plaza Macerich HHF Broadway Plaza LLC—Broadway Plaza [Member] Macerich HHF Broadway Plaza LLC—Broadway Plaza [Member] 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 Debt Instrument [Axis] Debt Instrument [Axis] Freehold Raceway Mall and Chandler Fashion Center Freehold Raceway Mall and Chandler Fashion Center [Member] Represents the information pertaining to the Freehold Raceway Mall and Chandler Fashion Center properties. Level 2 (Level 2) Fair Value, Inputs, Level 2 [Member] 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 Distributions from unconsolidated joint ventures Distributions of Capital from Unconsolidated Entities and Other Cash inflows from unconsolidated entities and other. 2022 Below Market Lease, Amortization Income, Year Four Stock options Share-based Payment Arrangement, Option [Member] Cost Capitalized Subsequent to Acquisition SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Cost Capitalized Subsequent to Acquisition, Cost Interest rate swap Interest Rate Swap [Member] Accumulated Depreciation Balances, beginning of year Balances, end of year SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation Statement [Table] Statement [Table] Number of interest rate swap agreements Derivative, Number of Instruments Held In-place lease values Finite-Lived Intangible Asset, Acquired-in-Place Leases Debt issued Proceeds from Issuance of Debt Measurement Frequency [Axis] Measurement Frequency [Axis] Market rent per square foot Finance Leased Asset, Measurement Input Assets Variable Interest Entity, Consolidated, Carrying Amount, Assets Changes in assets and liabilities, net of acquisitions and dispositions: Increase (Decrease) in Operating Capital [Abstract] Payment of finance deposits, net of refunds received Payment of Finance Deposits Payment of Finance Deposits Shares available for issuance under plan (in shares) Share-based Compensation Arrangement by Share-based Payment Award, Number of Shares Available for Grant 2019 Below Market Lease, Amortization Income, Next Twelve Months Total lease cost Lease, Cost Bank and Other Notes Payable Debt Disclosure [Text Block] Equipment and furnishings Equipment and Furnishings [Member] Tangible personal property, nonconsumable in nature, with finite lives used to produce goods and services and long-lived, depreciable assets commonly used in offices and stores. Proceeds from sale of land Proceeds from Sale of Land Held-for-investment New Accounting Pronouncements or Change in Accounting Principle [Table] New Accounting Pronouncements or Change in Accounting Principle [Table] Antidilutive securities Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items] Unrecaptured Section 1250 gain (in dollars per share) Common Stock, Dividends, Unrecaptured Section 1250 Gain Distribution, Per Share Represents the unrecaptured Section 1250 gain distributed as dividend per common stock share. Deferred Compensation Plans Deferred Compensation Plans [Member] Deferred Compensation Plans [Member] Schedule of Range of the Terms of Loan and Lease Agreements Schedule of Range of Terms of Loan and Lease Agreements [Table Text Block] Tabular disclosure of the range of the terms of loan and lease agreements over which costs are deferred and amortized. The Marketplace at Flagstaff Flagstaff Mall, the Market Place at [Member] Represents the information pertaining to real estate property of the entity, Flagstaff Mall, the Marketplace at. Consolidation of VIE Consolidation, Variable Interest Entity, Policy [Policy Text Block] Leasing revenue - fixed payments Operating Leases, Income Statement, Minimum Lease Revenue Depreciation and amortization Depreciation, Depletion and Amortization, Nonproduction Coolidge Holding LLC Coolidge Holding [Member] Represents the joint venture, Coolidge Holding LLC. Intangible assets: Finite-Lived Intangible Assets, Gross [Abstract] Property improvements Payments to Develop Real Estate Assets Desert Sky Mall Desert Sky Mall [Member] Represents the Desert Sky Mall property. Investment, Name [Axis] Investment, Name [Axis] Fair Value Measurements, Recurring and Nonrecurring [Table] Fair Value, Recurring and Nonrecurring [Table] Basic (shares) Denominator for basic EPS—weighted average number of common shares outstanding (shares) Weighted Average Number of Shares Outstanding, Basic Allocated value net Finite-Lived Intangible Assets, Net Risk Free Interest Rate Risk free rate Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions, Risk Free Interest Rate Name of Property [Domain] Name of Property [Domain] Dispositions Disposal Groups, Including Discontinued Operations, Disclosure [Text Block] Collateral [Domain] Collateral [Domain] LSM Note Note Receivable1 [Member] Note Receivable1 [Member] Retirement Plan Name [Axis] Retirement Plan Name [Axis] 2021 Finite-Lived Intangible Assets, Amortization Expense, Year Two ASSETS: Assets [Abstract] Schedule of Long-term Debt Instruments [Table] Schedule of Long-term Debt Instruments [Table] Cash and cash equivalents Cash and Cash Equivalents, at Carrying Value Unconsolidated joint ventures Unconsolidated Joint Ventures [Member] Represents unconsolidated joint ventures. Loss on extinguishment of debt Gain (Loss) on Extinguishment of Debt Document Fiscal Year Focus Document Fiscal Year Focus Stockholders' Equity Stockholders' Equity Note Disclosure [Text Block] Tysons Corner Property LLC Tysons Corner Property LLC [Member] Represents the joint venture, Tysons Corner Property LLC. Return of capital (in dollars per share) Common Stock, Dividends, Return of Capital Distribution, Per Share Represents the return of capital distributed as dividend per common stock share. Cash payments for interest, net of amounts capitalized Interest Paid, Excluding Capitalized Interest, Operating Activities Subsequent Event Type [Domain] Subsequent Event Type [Domain] Fashion Outlets of Niagara Falls USA Fashion Outlets of Niagara [Member] Represents the information pertaining to real estate property of the entity, Fashion Outlets of Niagara. Adjustment of noncontrolling interests in Operating Partnership Noncontrolling Interest, Increase from Subsidiary Equity Issuance Fashion Outlets of San Francisco Fashion Outlets of San Francisco [Member] Fashion Outlets of San Francisco [Member] Stock units Stock Units [Member] Stock units as awarded by an entity to their employees as a form of incentive compensation. Entity Emerging Growth Company Entity Emerging Growth Company Gain on land sales Gain (Loss) On Land Sales Gain (Loss) On Land Sales Accumulated Deficit Retained Earnings [Member] Pacific Premier Retail LLC—Various Properties PPR Portfolios Pacific Premier Retail LLC [Member] Pacific Premier Retail LLC [Member] Net cash (used in) provided by investing activities Net Cash Provided by (Used in) Investing Activities MACWH, LP MACWH, LP [Member] Represents the information pertaining to real estate property of the entity, MACWH, LP. Related Party Transaction [Axis] Related Party Transaction [Axis] Other assets Other Assets [Member] Variable Interest Entity, Classification [Domain] Variable Interest Entity, Classification [Domain] Average interest rate (as a percent) Line of Credit Facility, Interest Rate During Period Antidilutive securities (shares) Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount Balance Sheet Location [Axis] Balance Sheet Location [Axis] Statement of Financial Position [Abstract] Statement of Financial Position [Abstract] Tenant improvements Tenant Improvements Construction in progress Construction in Progress Development in Process Mortgage loan SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate, Face Amount of Mortgages Initial Application Period Cumulative Effect Transition [Axis] Initial Application Period Cumulative Effect Transition [Axis] Employee Benefit Plans: Defined Contribution Plan Disclosure [Line Items] 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. Total undiscounted rental payments Lessee, Operating Lease, Liability, Payments, Due Entity [Domain] Entity [Domain] Reconciliation of Numerator and Denominator Used in Computation of Earnings Per Share Schedule of Earnings Per Share, Basic and Diluted [Table Text Block] Land Land [Member] Property, Plant and Equipment, Type [Axis] Property, Plant and Equipment, Type [Axis] Effective interest rate Derivative, Swaption Interest Rate Increase (Decrease) in Stockholders' Equity Increase (Decrease) in Stockholders' Equity [Roll Forward] Total equity Balance Balance Stockholders' Equity, Including Portion Attributable to Noncontrolling Interest Noncontrolling interests Stockholders' Equity Attributable to Noncontrolling Interest Summary of Activity of Stock Options Share-based Payment Arrangement, Option, Activity [Table Text Block] Property Property, Plant and Equipment, Policy [Policy Text Block] Line of Credit Line of Credit [Member] First vesting period Share-based Payment Arrangement, Tranche One [Member] Term of award (in years) Share Based Compensation Arrangements by Share Based Payment Award, Expiration Term The period of time, from the grant date until the time at which the share-based award expires. Equipment and furnishings Equipment and Furnishings Fixtures and Equipment, Gross Subsequent Event Type [Axis] Subsequent Event Type [Axis] Additions Real Estate Accumulated Depreciation, Depreciation Expense and Other Additions Amount of depreciation expense and other additions to accumulated depreciation for the period. Property, net Property, Plant and Equipment Disclosure [Text Block] Derivative Instruments and Hedging Activities Derivative Instruments and Hedging Activities Disclosure [Text Block] 2023 Long-term Debt, Maturities, Repayments of Principal in Year Four Allocated Values of Above-market Leases and below-market leases Schedule of Acquired Finite-Lived Intangible Assets by Major Class [Table Text Block] Payment on finance arrangement obligation Distributions in excess of loan proceeds Joint Venture, Distributions in Excess of Loan Proceeds Joint Venture, Distributions in Excess of Loan Proceeds Equity: Stockholders' Equity, Including Portion Attributable to Noncontrolling Interest [Abstract] SanTan Village Regional Center San Tan Village Regional Center Mortgage [Member] Mortgage note payable on the SanTan Village Regional Center property pledged as collateral. Recent Accounting Pronouncements New Accounting Pronouncements, Policy [Policy Text Block] Employer match of employee contributions of first 3% of eligible compensation (as a percent) Defined Contribution Plan, Employer Match, Level One Represents the employer matching contribution of the first level of employee contributions. Biltmore Shopping Center Partners LLC Biltmore Shopping Center Partners LLC [Member] Represents the joint venture, Biltmore Shopping Center Partners LLC. Property, primarily differences in depreciation and amortization, the tax basis of land assets and treatment of certain other costs Deferred Tax Assets, Property, Plant and Equipment Investments in unconsolidated joint ventures 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. Deferred Charges: Deferred Costs [Abstract] June 1, 2017 June 1, 2017 [Member] June 1, 2017 [Member] Summary of Lease Costs Lease, Cost [Table Text Block] Vesting [Domain] Vesting [Domain] 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. State taxes Effective Income Tax Rate Reconciliation, State and Local Income Taxes, Amount Interest rate cap/swap agreements Other Comprehensive Income (Loss), Cash Flow Hedge, Gain (Loss), after Reclassification and Tax Dispositions and retirements Real Estate Accumulated Depreciation, Real Estate Sold or Retired The amount that was removed from accumulated depreciation pertaining to real estate that was sold or retired in the period. Long-term Debt, Type [Domain] Long-term Debt, Type [Domain] Schedule of Related Party Transactions, by Related Party [Table] Schedule of Related Party Transactions, by Related Party [Table] Loss (gain) 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 Employer contribution Defined Contribution Plan, Cost 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. Distributions of the partner's share of net income Income (Loss) from Joint Venture Income (Loss) from Joint Venture Net operating loss carryforwards Deferred Tax Assets, Operating Loss Carryforwards Tenant and other receivables, net Accounts and Financing Receivable, after Allowance for Credit Loss Related Party Transaction [Line Items] Related Party Transaction [Line Items] Property area (in square feet) Area of Real Estate Property Difference between revenue guidance in effect before and after topic 606 Difference between Revenue Guidance in Effect before and after Topic 606 [Member] Total liabilities and partners' capital Equity Method Investment, Summarized Financial Information, Liabilities and Equity Noncontrolling Interests Noncontrolling Interest [Member] Less net income attributable to noncontrolling interests Net income attributable to noncontrolling interests Net Income (Loss) Attributable to Noncontrolling Interest Operating Partnership's VIEs Variable Interest Entity, Primary Beneficiary [Member] LIBOR Rate Derivative, Variable Interest Rate Weighted Average Grant Date Fair Value Weighted Average Grant Date Fair Value (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 [Abstract] (Level 3) Fair Value, Inputs, Level 3 [Member] Deferred financing costs, amortization period (in years) Deferred Financing Costs Amortization, Period Represents the term of loan agreements over which financing costs are deferred and amortized. Co-Venture Arrangement [Abstract] Co-Venture Arrangement [Abstract] Co-Venture Arrangement [Abstract] Estimated useful lives of assets (in years) Property, Plant and Equipment, Useful Life Notes receivable Notes Receivable [Member] 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. Summary of Quarterly Results of Operations Quarterly Financial Information [Table Text Block] Estimated useful lives of assets SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Life Used for Depreciation Summary of Components of Leasing Revenue Operating Lease, Lease Income [Table Text Block] Income Tax Disclosure [Abstract] Income Tax Disclosure [Abstract] Affiliated entity Affiliated Entity [Member] Corte Madera Village, LLC Corte Madera Village, LLC [Member] Represents Corte Madera Village, LLC, a joint venture in which the entity has made investment. Initial Cost to Company SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost [Abstract] Comprehensive income attributable to the Company Comprehensive Income (Loss), Net of Tax, Attributable to Parent Number of business segments Number of Reportable Segments Entity Registrant Name Entity Registrant Name 2022 Finance Lease, Liability, Payments, Due Year Three Non-cash investing and financing activities: Cash Flow, Noncash Investing and Financing Activities Disclosure [Abstract] Capital gains (in dollars per share) Common Stock, Dividends, Capital Gain Distribution, Per Share Represents the capital gain distributed as dividend per common stock share. Authorized amount for stock repurchase program Stock Repurchase Program, Authorized Amount Other Real Estate, Other [Member] Employee stock purchases (in shares) Stock Issued During Period, Shares, Employee Stock Purchase Plans Accumulated other comprehensive loss Accumulated Other Comprehensive Income (Loss), Net of Tax Leasing expenses Equity Method Investment, Summarized Financial Information, Leasing Expense Equity Method Investment, Summarized Financial Information, Leasing Expense City Area Code City Area Code Financing Arrangement Financing Arrangement [Table Text Block] Financing Arrangement Capital gains (as a percent) Common Stock, Dividends, Capital Gain Distribution, Percentage Represents the capital gain distributed as dividend, as a percentage of total dividends paid. 2022 Long-term Debt, Maturities, Repayments of Principal in Year Three Segment Information Segment Reporting, Policy [Policy Text Block] Third vesting period Share-based Payment Arrangement, Tranche Three [Member] ASU 2016-02 Accounting Standards Update 2016-02 [Member] Tangerine (Marana), The Shops at The Shops at Tangerine Marana [Member] Represents the information pertaining to real estate property of the entity, The Shops at Tangerine (Marana). Options Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding [Roll Forward] Line of credit Line of Credit Facility, Maximum Borrowing Capacity Basis adjustment Equity Method Investment, Difference Between Carrying Amount and Underlying Equity Tysons Corner Property Holdings II LLC Tysons Corner Property Holdings II LLC [Member] Represents the joint venture, Tysons Corner Property Holdings II LLC. Green Acres Commons Green Acres Commons [Member] Green Acres Commons [Member] 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. Cash and Cash Equivalents and Restricted Cash Cash and Cash Equivalents, Policy [Policy Text Block] Future Maturities of Mortgage Notes Payable Schedule of Future Maturities of Mortgage Notes Payable [Table Text Block] Tabular disclosure of the combined aggregate amount of maturities of mortgage notes payable for each of the five years following the date of the latest balance sheet date presented. Related Party Transactions Related Party Transactions Disclosure [Text Block] Valley River Center Valley River Center [Member] Represents the information pertaining to real estate property of the entity, Valley River Center. Original allocated value Finite-Lived Intangible Assets, Gross 2021 Lessee, Operating Lease, Liability, Payments, Due Year Two Net income Income (Loss) from Continuing Operations, Net of Tax, Including Portion Attributable to Noncontrolling Interest Related Party Transactions [Abstract] Related Party Transactions [Abstract] Fair Value Hierarchy and NAV [Domain] Fair Value Hierarchy and NAV [Domain] Interest in the loan assumed by a third party (as a percent) Percentage of Loan Assumed by Third Party Portion of the loan assumed by a third party. Los Angeles Premium Outlets Los Angeles Premium Outlets [Member] Los Angeles Premium Outlets [Member] Revenues Revenue from Contract with Customer [Policy Text Block] Two freestanding stores Two Freestanding Store [Member] Two Freestanding Store [Member] Changes in accumulated depreciation SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation [Roll Forward] Property, Plant and Equipment [Abstract] Property, Plant and Equipment [Abstract] Notes receivable interest rate (as a percent) Notes receivable interest rate Notes Receivable Interest Rate The stated interest rate on the note receivable. Other accrued liabilities Increase (Decrease) in Other Accrued Liabilities Below Market Below Market Lease [Member] Below Market Lease [Member] Antidilutive Securities, Name [Domain] Antidilutive Securities, Name [Domain] Payments on mortgages, bank and other notes payable Repayments of Long-term Debt Fair value of mortgage notes payable Notes Payable, Fair Value Disclosure Deferred compensation plan assets Deferred Compensation Plan Assets Total Stockholders' Equity Parent [Member] 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. Equity Award [Domain] Award Type [Domain] Office building Office Building [Member] 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. Derivative Instrument [Axis] Derivative Instrument [Axis] 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. (Level 1) Fair Value, Inputs, Level 1 [Member] Subsidiary of Limited Liability Company or Limited Partnership [Line Items] Subsidiary of Limited Liability Company or Limited Partnership [Line Items] Schedule of Deferred Charges and Other Assets, Net Schedule of Other Assets [Table Text Block] Adjustment to fair value of financing arrangement obligation Fair Value Adjustment of Finance Obligation Fair Value Adjustment of Finance Obligation Weighted average incremental borrowing rate, finance leases Finance Lease, Weighted Average Discount Rate, Percent Award Date [Axis] Award Date [Axis] Net cash provided by operating activities Net Cash Provided by (Used in) Operating Activities Balance at beginning of year (shares) Balance at end of year (shares) Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Number Thereafter Lessee, Operating Lease, Liability, Payments, Due after Year Five Equity in income of unconsolidated joint ventures Equity in income of unconsolidated joint ventures Company's equity in net (loss) income Income (Loss) from Equity Method Investments Building and Improvements SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Building and Improvements, Amount Investment, Name [Domain] Investment, Name [Domain] Gain on sale of assets Gain (Loss) on Sale of Properties Vintage Faire Mall Vintage Faire Mall Mortgage [Member] Mortgage note payable on the Vintage Faire Mall property pledged as collateral. Variable Interest Entity [Line Items] Variable Interest Entity [Line Items] Leases Lessee, Finance Leases [Text Block] PPR Portfolio Pacific Premier Retail LP [Member] Represents Pacific Premier Retail LP, a joint venture in which the entity has made investment. 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. Note receivable Notes Receivable, Related Parties Balance at beginning of year (shares) Balance at end of year (shares) Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Number Ownership interest in operating partnership (as a percent) Noncontrolling Interest, Ownership Percentage by Parent Expected Volatility Expected volatility Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions, Expected Volatility Rate Mortgage notes payable assumed by buyer in exchange for investment in unconsolidated joint venture Notes Assumed Thereafter Lessor, Operating Lease, Payments to be Received, Thereafter Distributions of the partner's share of net income Schedule of Joint Ventures [Line Items] -- None. No documentation exists for this element. -- Schedule of Finite-Lived Intangible Assets [Table] Schedule of Finite-Lived Intangible Assets [Table] LIBOR London Interbank Offered Rate (LIBOR) [Member] Other Effective Income Tax Rate Reconciliation, Other Adjustments, Amount Southridge Center Southridge Center [Member] Southridge Center [Member] Collateral [Axis] Collateral [Axis] Tenant and Other Receivables, net Loans, Notes, Trade and Other Receivables Disclosure [Text Block] Shopping center and operating expenses Real Estate [Member] Total liabilities Liabilities Schedule of Antidilutive Securities Excluded from Computation of Earnings Per Share [Table] Schedule of Antidilutive Securities Excluded from Computation of Earnings Per Share [Table] Number of finance leases Finance Lease, Number of Leases Finance Lease, Number of Leases Interest earned Interest Income, Related Party Equipment and Furnishings Real Estate and Accumulated Depreciation, Initial Cost of Equipment Furnishing Initial cost to the Entity for Equipment and furnishings. Net income attributable to common stockholders (dollars per share) Basic (dollars per share) Earnings Per Share, Basic Goodyear Peripheral LLC Goodyear Peripheral LLC [Member] Goodyear Peripheral LLC Quarterly Financial Information Disclosure [Abstract] Quarterly Financial Information Disclosure [Abstract] 2023 Lessee, Operating Lease, Liability, Payments, Due Year Four Interest expense capitalized Interest Costs Capitalized Non-qualified stock options Non-qualified Stock Options [Member] Non-qualified Stock Options [Member] 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] Revolving line of credit Revolving Credit Facility [Member] 2020 Finance Lease, Liability, Payments, Due Next Twelve Months 2020 Lessee, Operating Lease, Liability, Payments, Due Next Twelve Months ASU 2014-09 Accounting Standards Update 2014-09 [Member] Westcor/Surprise Auto Park LLC Westcor/Surprise Auto Park LLC [Member] Represents the joint venture, Westcor/Surprise Auto Park LLC. Schedule of Cash and Cash Equivalents Schedule of Cash and Cash Equivalents [Table Text Block] Less imputed interest Finance Lease, Liability, Undiscounted Excess Amount Superstition Springs Center Superstition Springs Center [Member] Represents the joint venture, East Mesa Mall, L.L.C. - Superstition Springs Center. Discount rate Financing Arrangement, Discount Rate Financing Arrangement, Discount Rate 2020 Below Market Lease, Amortization Income, Year Two Distributions to co-venture partner Distributions to Co-venture Partner This element represents the distributions to co - venture partner. Dividends declared for common stock (in dollars per share) Common Stock, Dividends, Per Share, Declared Revenues: Revenues [Abstract] Leasing revenue Leasing revenue Operating Leases, Income Statement, Lease Revenue Total assets Assets Schedule of Estimated Amortization of Intangible Assets for the Next Five Years and Thereafter Schedule of Finite-Lived Intangible Assets, Future Amortization Expense [Table Text Block] January 29, 2018 January 29, 2018 [Member] January 29, 2018 [Member] (Loss) gain on sale or write down of assets, net (Loss) gain on sale or write down of assets, net Gain (Loss) on Sale of Assets and Asset Impairment Charges Plan Name [Domain] Plan Name [Domain] 2003 Equity Incentive Plan Equity Incentive Plan 2003 [Member] Represents information pertaining to 2003 Equity Incentive Plan of the entity. Noncontrolling Interest [Abstract] Noncontrolling Interest [Abstract] Document Fiscal Period Focus Document Fiscal Period Focus Deferred Deferred Income Tax Expense (Benefit) Wilton Mall Wilton Mall Member [Member] Represents the information pertaining to real estate property of the entity, Wilton Mall. Document Type Document Type Tysons Tower Tysons Tower [Domain] Tysons Tower Entity Tax Identification Number Entity Tax Identification Number Due from affiliates Increase (Decrease) Due from Affiliates 2024 Finance Lease, Liability, Payments, Due Year Five Vintage Faire Mall Vintage Faire Mall [Member] Represents the information pertaining to real estate property of the entity, Vintage Faire Mall. Schedule of Variable Interest Entities [Table] Schedule of Variable Interest Entities [Table] 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 Lake Square Mall Lake Square Mall [Member] Represents the information pertaining to real estate property of the entity, Lake Square Mall. Investments in unconsolidated joint ventures Co-Venture Asset, Distributions in Excess of Obligation Co-Venture Asset, Distributions in Excess of Obligation Total expenses Costs and Expenses Restricted cash Restricted Cash, Current Other accrued liabilities Other Accrued Liabilities Entity Interactive Data Current Entity Interactive Data Current Income tax (expense) benefit Income tax expense (benefit) Income tax (expense) benefit Income Tax Expense (Benefit) Fair Value Hierarchy and NAV [Axis] Fair Value Hierarchy and NAV [Axis] Total liabilities Liabilities, Total [Member] Summary of Future Minimum Rental Payments Required Lessee, Operating Lease, Liability, Maturity [Table Text Block] Distributions Dividends, Common Stock, Cash 2023 Finance Lease, Liability, Payments, Due Year Four Non-real estate Non-Real Estate [Member] Non-Real Estate Property, Plant and Equipment, Type [Domain] Property, Plant and Equipment, Type [Domain] Property, net Real Estate Investment Property, Net [Member] Real Estate Investment Property, Net [Member] Schedule of Loss (Gain) on Sale or Write down of Assets Details of Impairment of Long-Lived Assets Held and Used by Asset [Table Text Block] Loss on extinguishment of debt Gains (Losses) on Extinguishment of Debt, Including Penalties Gains (Losses) on Extinguishment of Debt, Including Penalties Related Party [Axis] Related Party [Axis] March 3, 2017 March 3, 2017 [Member] March 3, 2017 [Member] Comprehensive income Comprehensive Income (Loss), Net of Tax, Including Portion Attributable to Noncontrolling Interest Entity Common Stock, Shares Outstanding Entity Common Stock, Shares Outstanding Financing arrangement obligation Financing Arrangement Obligation Financing Arrangement Obligation Property, net Property, net Real Estate Investment Property, Net Granted (shares) Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period 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 Schedule LTIP Units Valuation Assumptions Schedule of Share-based Payment Award, Stock Options, Valuation Assumptions [Table Text Block] Award Type [Axis] Award Type [Axis] Compensation Cost Under the Share and Unit-based Plans Share-based Payment Arrangement, Cost by Plan [Table Text Block] Counterparty Name [Domain] Counterparty Name [Domain] Service-based Long Term Incentive Plan, Service-based [Member] Long Term Incentive Plan, Service-based [Member] Other Deferred Tax Assets (Liabilities) Other Represents the deferred tax assets and liabilities related to other temporary differences not otherwise specified as of the balance sheet date. Original allocated value Below Market Lease, Gross 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] Maximum contingent borrowing capacity Line of Credit Facility, Maximum Contingent Borrowing Capacity Line of Credit Facility, Maximum Contingent Borrowing Capacity Estimated fair value of term loan Debt Instrument, Fair Value Disclosure Accounts receivable Accounts Receivable, before Allowance for Credit Loss Assumption of debt Proceeds from Divestiture of Business, Assumption of Debt Proceeds from Divestiture of Business, Assumption of Debt Reimbursement percent Reimbursement Percent, Collaborative Arrangement Reimbursement Percent, Collaborative Arrangement Subsequent Events [Abstract] Subsequent Events [Abstract] Balance at beginning of year (in dollars per share) Balance at end of year (in dollars per share) Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Weighted Average Exercise Price Ownership interest (as a percent) Joint Venture Ownership Percentage Sold The percentage of ownership interest in the joint venture sold by the entity during the period. TM TRS Holding Company LLC TM TRS Holding Company LLC—Valencia Place at Country Club Plaza [Member] TM TRS Holding Company LLC—Valencia Place at Country Club Plaza [Member] HPP-MAC WSP, LLC—One Westside HPP-MAC WSP, LLC—One Westside [Member] HPP-MAC WSP, LLC—One Westside [Member] Tucson La Encantada Tucson La Encantada Mortgage [Member] Mortgage note payable on the Tucson La Encantada property pledged as collateral. Current Current Income Tax Expense (Benefit) Chandler Fashion Center Chandler Fashion Center [Member] Represents the information pertaining to real estate property of the entity, Chandler Fashion Center. Deferred charges and other assets, net Deferred charges and other assets, net Deferred charges and other assets, net Deferred Costs and Other Assets Danbury Fair Mall Danbury Fair Mall Mortgage [Member] Mortgage note payable on the Danbury Fair Mall property pledged as collateral. Repurchased shares (in shares) Treasury Stock, Shares, Acquired Notes receivable Financing Receivable, before Allowance for Credit Loss Summary of Significant Accounting Policies Basis of Presentation and Significant Accounting Policies [Text Block] Proceeds from sale of building Proceeds from Sale of Buildings Quarterly Financial Data (Unaudited) Quarterly Financial Information [Text Block] Entity Well-known Seasoned Issuer Entity Well-known Seasoned Issuer Leasing revenue Operating Lease, Lease Income Commitments and Contingencies Commitments and Contingencies Disclosure [Text Block] Tenant improvements Tenant Improvements [Member] Represents the improvements having a life longer than one year that were made for the benefit of one or more tenants. Fair value of equity-based awards vested during period Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Vested in Period, Fair Value 2022 Finite-Lived Intangible Assets, Amortization Expense, Year Three Other Joint Ventures Other Joint Ventures [Member] Represents other joint ventures in which the entity participates, not specifically identified. Prasada Note Prasada Note [Member] Prasada Note [Member] Counterparty Name [Axis] Counterparty Name [Axis] AM Tysons LLC AM Tysons LLC [Member] AM Tysons LLC [Member] Deferral period for grant of units (in years) Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Period Schedule of Accounts, Notes, Loans and Financing Receivable [Table] Schedule of Accounts, Notes, Loans and Financing Receivable [Table] Loss on sale of assets 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. Director's Phantom Stock Plan Directors Phantom Stock Plan [Member] Represents the information pertaining to the entity's Directors' Phantom Stock Plan. Pay off of mortgage loans Repayments of Secured Debt March 2, 2018 March 2, 2018 [Member] March 2, 2018 [Member] 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. Share price (in dollars per share) Share Price Assets Measured on a Nonrecurring Basis Fair Value, Assets Measured on Recurring Basis [Table Text Block] Total Lessor, Operating Lease, Payments to be Received 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. Fourth vesting period Share-based Compensation Award, Tranche Four [Member] Share-based Compensation Award, Tranche Four [Member] Balance at beginning of year (in dollars per share) Balance at end of year (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 Revenues Management fees Revenue from Contract with Customer, Excluding Assessed Tax Ownership [Domain] Ownership [Domain] Interest expense, related party Related Party Transaction, Expenses from Transactions with Related Party Tax at statutory rate on earnings from continuing operations before income taxes Effective Income Tax Rate Reconciliation at Federal Statutory Income Tax Rate, Amount Segment Information: Segment Reporting [Abstract] Simon Property Group Simon Property Group [Member] Simon Property Group Leasing Deferred Costs, Leasing, Gross Country Club Plaza Country Club Plaza [Member] Country Club Plaza [Member] Leasing revenue - variable payments Operating Leases, Income Statement, Contingent Revenue Scottsdale Fashion Square Partnership Scottsdale Fashion Square Partnership [Member] Represents the joint venture, Scottsdale Fashion Square Partnership. Derivative Contract [Domain] Derivative Contract [Domain] Related Party [Domain] Related Party [Domain] Percentage of eligible compensation, matched 100% by employer (as a percent) Defined Contribution Plan, Employer Match, Employee Contribution, Level One Represents the first level of employee contributions (percentage of compensation) which are matched by the employer. Proceeds from mortgages, bank and other notes payable Proceeds from Issuance of Long-term Debt and Capital Securities, Net Interest rate cap Interest Rate Cap [Member] Earnings Per Share [Abstract] Earnings Per Share [Abstract] NorthPark Mall Northpark Mall [Member] Represents the information pertaining to real estate property of the entity, Northpark Mall. Exercised (in dollars per share) Share-based Compensation Arrangements by Share-based Payment Award, Options, Exercises in Period, Weighted Average Exercise Price Retirement Benefits [Abstract] Retirement Benefits [Abstract] Fair value of line of credit Line of Credit Facility, Fair Value of Amount Outstanding In-place lease values, leasing commissions and legal costs Leases, Acquired-in-Place [Member] Security Exchange Name Security Exchange Name Entity Incorporation, State or Country Code Entity Incorporation, State or Country Code Entity Address, Address Line Two Entity Address, Address Line Two Entity Address, Address Line One Entity Address, Address Line One Summary of Activity of Non-vested Phantom Stock Units Schedule of Share-based Compensation, Phantom Stock Units Award, Activity [Table Text Block] Tabular disclosure of the changes in outstanding nonvested phantom stock units. Operating lease costs Operating Lease, Cost Amortization of share and unit-based plans (in shares) Shares Issued, Shares, Share-based Payment Arrangement, after Forfeiture Credit Facility [Axis] Credit Facility [Axis] Other liabilities Other Liabilities [Member] Deferred leasing costs Increase (Decrease) in Deferred Leasing Fees 2024 Lessor, Operating Lease, Payments to be Received, Five Years Contributions from noncontrolling interests Noncontrolling Interest, Increase from Contributions from Noncontrolling Interests Noncontrolling Interest, Increase from Contributions from Noncontrolling Interests Financing arrangement Financing Arrangement [Member] Financing Arrangement [Member] Statement of Comprehensive Income [Abstract] Statement of Comprehensive Income [Abstract] Less accumulated amortization Below Market Lease, Accumulated Amortization Property Land, Buildings and Improvements [Member] Santa Monica Place Santa Monica Place Mortgage [Member] Mortgage note payable on Santa Monica Place property pledged as collateral. Kings Plaza Shopping Center Kings Plaza [Member] Kings Plaza [Member] Earnings Per Share (EPS) Earnings Per Share [Text Block] Redemption of noncontrolling interests Payments to Noncontrolling Interests Proceeds from collection of notes receivable Proceeds from Collection of Notes Receivable Deferred Charges and Other Assets, net Other Assets Disclosure [Text Block] Acquisitions Business Combinations Policy [Policy Text Block] 2020 Lessor, Operating Lease, Payments to be Received, Next Twelve Months Maximum High end of range Maximum [Member] Schedule of Income Tax Provision of TRSs Schedule of Components of Income Tax Expense (Benefit) [Table Text Block] 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) Title of 12(b) Security Title of 12(b) Security Lease liabilities recorded in connection with right-of-use assets Right-of-Use Asset Obtained in Exchange for Operating Lease Liability 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. Outstanding obligations under construction agreements Construction Payable, Current Range [Domain] Statistical Measurement [Domain] Below-Market Leases Below Market Lease [Abstract] Unrecaptured Section 1250 gain (as a percent) Common Stock, Dividends, Unrecaptured Section 1250 Gain Distribution, Percentage Represents the unrecaptured Section 1250 gain distributed as dividend, as a percentage of total dividends paid. Net (decrease) increase in cash, cash equivalents and restricted cash Cash, Cash Equivalents, Restricted Cash and Restricted Cash Equivalents, Period Increase (Decrease), Excluding Exchange Rate Effect Increase in minimum rent due to straight-line rent adjustment Straight Line Rent Adjustments Contributions to unconsolidated joint ventures Payments to Acquire Interest in Joint Venture Noncontrolling Interest [Table] Noncontrolling Interest [Table] Operating Leases Lessee, Operating Lease, Liability, Payment, Due [Abstract] Schedule of Equity Method Investments [Table] Schedule of Equity Method Investments [Table] Accounting Policies [Abstract] Accounting Policies [Abstract] Cash flows from investing activities: Net Cash Provided by (Used in) Investing Activities [Abstract] Portfolio of marketable securities Marketable Securities Documents Incorporated by Reference Documents Incorporated by Reference [Text Block] Joint venture Corporate Joint Venture [Member] Debt premiums Debt Instrument, Unamortized Premium Allocated values of leases Acquired Finite-Lived Intangible Assets [Line Items] Acquired Finite-Lived Intangible Assets [Line Items] Book (income) loss for TRSs Book Income, Loss for TRS Represents the book income (loss) for taxable REIT subsidiaries (TRSs). Depreciation expense Depreciation, Nonproduction 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. Disclosure of Compensation Related Costs, Share-based Payments [Abstract] Share-based Payment Arrangement [Abstract] Tysons Corner Hotel I LLC Tysons Corner Hotel I LLC [Member] Tysons Corner Hotel I LLC [Member] Concentration of Risk Concentration Risk, Credit Risk, Policy [Policy Text Block] Related parties Total incurred interest (income) expense Interest (income) expense from related party transactions Interest Income (Expense), Related Party Interest Income (Expense), Related Party Noncontrolling Interests Noncontrolling Interest Disclosure [Text Block] Other freestanding stores Freestanding Store [Member] Freestanding Store [Member] Additional Paid-in Capital Additional Paid-in Capital [Member] CAM-CARSON LLC—Los Angeles Premium Outlets CAM-CARSON LLC - Los Angeles Premium Outlets [Member] CAM-CARSON LLC - Los Angeles Premium Outlets [Member] West Acres Development, LLP West Acres Development, LLP [Member] Represents the joint venture, West Acres Development, LLP. Common stock, shares outstanding Common Stock, Shares, Outstanding Kierland Commons Investment LLC Kierland Commons Investment LLC [Member] Represents the joint venture, Kierland Commons Investment LLC. Income Taxes Income Tax, Policy [Policy Text Block] Stock repurchases Payments for Repurchase of Common Stock Total Balances, beginning of year Balances, end of year SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Gross Real Estate, Type of Property [Axis] Real Estate, Type of Property [Axis] 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. Mortgage notes payable Secured Debt [Member] Expenses: Costs and Expenses [Abstract] Less accumulated depreciation Real Estate Investment Property, Accumulated Depreciation Assets: Equity Method Investment, Summarized Financial Information, Assets [Abstract] 2020 Finite-Lived Intangible Assets, Amortization Expense, Next Twelve Months Westside Pavilion Westside Pavilion [Member] Represents the information pertaining to real estate property of the entity, Westside Pavilion. Expected term (in years) Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions, Expected Term Availability for additional borrowings Line of Credit Facility, Remaining Borrowing Capacity Leases Lessor, Operating Leases [Text Block] 2022 Lessee, Operating Lease, Liability, Payments, Due Year Three Interest (income) expense: Interest Expense [Abstract] 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. Aggregate gross cost of the property for federal income tax purposes SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Federal Income Tax Basis Total assets Total assets Equity Method Investment, Summarized Financial Information, Assets Accumulated deficit Retained Earnings (Accumulated Deficit) Stonewood Center Stonewood Center [Member] Stonewood Center [Member] Weighted average incremental borrowing rate, operating leases Operating Lease, Weighted Average Discount Rate, Percent Leasing expense Operating Lease, Initial Direct Cost Expense, over Term Gain on disposal Gain (loss) on disposal Disposal Group, Not Discontinued Operation, Gain (Loss) on Disposal 443 Wabash MAB LLC 443 Wabash MAB LLC [Member] 443 Wabash MAB LLC [Member] Santa Monica Place Santa Monica Place [Member] Represents the information pertaining to real estate property of the entity, Santa Monica Place. San Tan Adjacent Land San Tan Adjacent Land [Member] Represents the information pertaining to real estate property of the entity, SanTan Adjacent Land. Property, Plant and Equipment [Table] Property, Plant and Equipment [Table] Cash flows from operating activities: Net Cash Provided by (Used in) Operating Activities [Abstract] The Oaks The Oaks [Member] Represents the information pertaining to real estate property of the entity, The Oaks. Inland Center Inland Center [Member] Inland Center [Member] Payments on finance leases Finance Lease, Principal Payments Gross Amount at Which Carried at Close of Period SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Gross [Abstract] Macerich Management Co. Macerich Management Company [Member] Represents the information pertaining to real estate property of the entity, Macerich Management Company. Leasing revenue - variable payments Variable Lease, Income Supplemental cash flow information: Supplemental Cash Flow Information [Abstract] Employee stock purchases Stock Issued During Period, Value, Employee Stock Purchase Plan Schedule Operating Partnership's VIEs Schedule of Variable Interest Entities [Table Text Block] 2023 Lessor, Operating Lease, Payments to be Received, Four Years Entity Public Float Entity Public Float Kings Plaza Shopping Center Kings Plaza Mortgage [Member] Mortgage note payable on the Kings Plaza property pledged as collateral. Thereafter Long-term Debt, Maturities, Repayments of Principal after Year Five Cash flows from financing activities: Net Cash Provided by (Used in) Financing Activities [Abstract] Dividends, dollars per share Dividends [Abstract] 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 Compensation cost under share and unit-based plans Share-based Payment Arrangement, Expense Deferred tax assets Deferred tax assets Deferred Tax Assets, Net Notional Amount Derivative, Notional Amount Organization, Consolidation and Presentation of Financial Statements [Abstract] Organization, Consolidation and Presentation of Financial Statements [Abstract] Range [Axis] Statistical Measurement [Axis] Company's capital Equity Method Investment, Underlying Equity in Net Assets ESPP Employee Stock Purchase Plan [Member] Employee Stock Purchase Plan [Member] Leasing expenses Operating Leases, Income Statement, Initial Direct Costs Fair Values Derivatives, Balance Sheet Location, by Derivative Contract Type [Table] Fair Values Derivatives, Balance Sheet Location, by Derivative Contract Type [Table] Change in fair value of financing arrangement obligation Liabilities, Fair Value Adjustment WMAP, L.L.C.—Atlas Park, The Shops at WMAP LLC Atlas Park [Member] Represents the joint venture, WMAP, L.L.C. Atlas Park. Stockholders' equity: Stockholders' Equity Attributable to Parent [Abstract] Valley Mall Valley Mall [Member] Represents the information pertaining to real estate property of the entity, Valley Mall. Discontinued Operations and Disposal Groups [Abstract] Discontinued Operations and Disposal Groups [Abstract] Long-term Debt, Type [Axis] Long-term Debt, Type [Axis] Amortization of ROU assets Finance Lease, Right-of-Use Asset, Amortization Investment in unconsolidated joint ventures Equity Method Investments and Joint Ventures [Abstract] Summary of Activity of Non-vested Stock Units Share-based Payment Arrangement, Restricted Stock Unit, Activity [Table Text Block] Dividends paid for income tax purposes (in dollars per share) Common Stock, Dividends, Per Share, Cash Paid, Income Tax Purposes Common Stock, Dividends, Per Share, Cash Paid, Income Tax Purposes Entity Current Reporting Status Entity Current Reporting Status Dividends paid (as a percent) Common Stock, Dividends, Cash Paid, Percentage Aggregate percentage of dividends paid during the period for each share of common stock outstanding. 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. 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. Net income attributable to common stockholders (dollars per share) Diluted (dollars per share) Earnings Per Share, Diluted Discount from market price (as a percent) Share-based Compensation Arrangement by Share-based Payment Award, Discount from Market Price, Offering Date One Scottsdale Investors LLC One Scottsdale [Member] Represents the joint venture, One Scottsdale Investors LLC. Receivable Type [Axis] Receivable Type [Axis] Kings Plaza Shopping Center Kings Plaza Shopping Center [Member] Kings Plaza Shopping Center SARs Stock Appreciation Rights (SARs) [Member] Employer match of employee contributions of next 2% of eligible compensation (as a percent) Defined Contribution Plan, Employer Match, Level Two Represents the employer matching contribution of the second level of employee contributions. Schedule of Share-based Compensation Arrangements by Share-based Payment Award [Table] Schedule of Share-based Compensation Arrangements by Share-based Payment Award [Table] Amortization of share and unit-based plans Shares Issued, Value, Share-based Payment Arrangement, after Forfeiture Towne Mall Towne Mall Mortgage [Member] Mortgage note payable on the Towne Mall property pledged as collateral. Capitalization of Costs Capitalization of Cost [Policy Text Block] When a cost is recorded originally as an increase to an asset account, it is said to be capitalized. This means that the outlay is treated as a capital expenditure, which becomes part of the total cost basis of the asset. The alternative is to record the cost as an expense immediately in the period the cost is incurred. Capitalized costs refer mainly to costs that are recorded in the long-term operating assets of a business, such as buildings, machines, equipment, tools, and so on. Entity Address, State or Province Entity Address, State or Province Conversion of noncontrolling interests to common shares (in shares) Stock Issued During Period, Shares, Conversion of Units 2021 Long-term Debt, Maturities, Repayments of Principal in Year Two Debt Disclosure [Abstract] Debt Disclosure [Abstract] Promenade at Casa Grande Promenade at Casa Grande [Member] Represents the information pertaining to real estate property of the entity, Promenade at Casa Grande. Maximum additional borrowings Note Payable, Maximum Additional Borrowing Note Payable, Maximum Additional Borrowing Variable interest rate spread, contingent (as a percent) Debt Instrument, Contingent on Certain Conditions, Basis Spread on Variable Rate Debt Instrument, Contingent on Certain Conditions, Basis Spread on Variable Rate Lease liabilities Operating and Finance Lease, Liability Operating and Finance Lease, Liability April 26, 2018 April 26, 2018 [Member] April 26, 2018 [Member] Net income attributable to the Company Net income attributable to the Company Net Income (Loss) Available to Common Stockholders, Basic Document Transition Report Document Transition Report South Park Mall South Park Mall [Member] Represents the information pertaining to real estate property of the entity, South Park Mall. 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. Vested (shares) Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Vested in Period Schedule of Subsidiary of Limited Liability Company or Limited Partnership [Table] Schedule of Subsidiary of Limited Liability Company or Limited Partnership [Table] 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] Total assets Assets, Total [Member] Schedule of Acquired Finite-Lived Intangible Asset by Major Class [Table] Schedule of Acquired Finite-Lived Intangible Asset by Major Class [Table] Variable interest rate spread (as a percent) Debt Instrument, Basis Spread on Variable Rate Initial Application Period Cumulative Effect Transition [Domain] Initial Application Period Cumulative Effect Transition [Domain] Net (loss) income Equity Method Investment, Summarized Financial Information, Net Income (Loss) Cash, cash equivalents and restricted cash at beginning of year Cash, cash equivalents, and restricted cash at end of year Cash, cash equivalents and restricted cash Cash, Cash Equivalents, Restricted Cash and Restricted Cash Equivalents 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. Deferred financing costs Payments of Financing Costs Schedule of Estimated Useful Lives of Property Schedule of Depreciable Lives of Real Estate Investment Property [Table Text Block] Tabular disclosure of the estimated useful lives of real estate investment property. Thereafter Thereafter Finite-Lived Intangible Assets, Amortization Expense, after Year Five Granted (in dollars per share) Share-based Compensation Arrangement by Share-based Payment Award, Options, Grants in Period, Weighted Average Grant Date Fair Value Development, redevelopment, expansion and renovation of properties Payments to Acquire, Develop, Redevelop, Expansion and Renovation Real Estate Payments to Acquire, Develop, Redevelop, Expansion and Renovation Real Estate Property, Plant and Equipment [Line Items] Property, Plant and Equipment [Line Items] Number of common shares into which units can be converted (shares) Conversion rate 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 Amortization of share and unit-based plans Share-based Payment Arrangement, Noncash Expense Document Annual Report Document Annual Report Adjustments for New Accounting Pronouncements [Axis] Adjustments for New Accounting Pronouncements [Axis] Derivatives, Fair Value [Line Items] Derivatives, Fair Value [Line Items] 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. Accounting for Impairment Impairment or Disposal of Long-Lived Assets, Policy [Policy Text Block] 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. Interest rate cap/swap agreements Other Comprehensive Income (Loss), Unrealized Gain (Loss) on Derivatives Arising During Period, Net of Tax Interest rate (as a percent) Effective interest rate (as a percent) Debt Instrument, Interest Rate, Effective Percentage Tenant and other receivables Increase (Decrease) in Accounts Receivable Interest on lease liabilities Finance Lease, Interest Expense Fashion District Philadelphia—Various Entities Fashion District Philadelphia Fashion District Philadelphia [Member] Fashion District Philadelphia [Member] Effect of dilutive securities Incremental Weighted Average Shares Attributable to Dilutive Effect [Abstract] Amortization of net premium on mortgage notes payable Amortization of Debt Discount (Premium) Entity Address, City or Town Entity Address, City or Town Derivative Instruments and Hedging Activities Derivatives, Policy [Policy Text Block] Entity Filer Category Entity Filer Category Entity Voluntary Filers Entity Voluntary Filers Total lease liabilities Finance Lease, Liability Convertible preferred units Preferred Nonparticipating Convertible Units [Member] Represents convertible non-participating units or equivalent units of ownership interest in an LLC or LP. New River Associates LLC—Arrowhead Towne Center New River Associates LLC—Arrowhead Towne Center [Member] New River Associates LLC—Arrowhead Towne Center [Member] 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. Development and leasing fees Development and Leasing Fees [Member] Development and Leasing Fees [Member] Subsequent Event [Table] Subsequent Event [Table] Statement [Line Items] Statement [Line Items] Disposition of property in exchange for investments in unconsolidated joint ventures Proceeds received in disposition of property Noncash or Part Noncash Divestiture, Amount of Consideration Received Investment in Unconsolidated Joint Ventures Equity Method Investments [Policy Text Block] 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 Amendment Flag Amendment Flag Paradise Valley Mall Paradise Valley Mall [Member] Represents the information pertaining to real estate property of the entity, Paradise Valley Mall. Award Date [Domain] Award Date [Domain] Other comprehensive loss: Comprehensive Income (Loss), Net of Tax, Including Portion Attributable to Noncontrolling Interest [Abstract] Other assets Other Assets, Miscellaneous Costs related to shareholder activism Unsolicited Tender Offer Costs Changes in total real estate assets SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate [Roll Forward] Vesting [Axis] Vesting [Axis] Allowance for doubtful accounts Allowance for Doubtful Accounts, Premiums and Other Receivables Number of common stock shares reserved for issuance (in shares) Common Stock, Capital Shares Reserved for Future Issuance Entity Central Index Key Entity Central Index Key Land SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Land, Amount Proceeds from sale Proceeds from Sale of Real Estate Accumulated Other Comprehensive Loss AOCI Attributable to Parent [Member] Contributions from noncontrolling interests Proceeds from Noncontrolling Interests Green Acres Mall Green Acres Mall [Member] Represents the information pertaining to real estate property of the entity, Green Acres Mall. Balance Sheet Location [Domain] Balance Sheet Location [Domain] LTIP units Long Term Incentive Plan [Member] Long-term incentive plan. Accounts payable and accrued expenses Increase (Decrease) in Other Accounts Payable and Accrued Liabilities Southridge Mall South Ridge Mall [Member] Represents the information pertaining to real estate property of the entity, South Ridge Mall. Retirement Plan Name [Domain] Retirement Plan Name [Domain] 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. Common stock, shares authorized Common Stock, Shares Authorized Additions Real Estate Acquisitions Improvements and Other Additions Amount of increase to real estate investments during the period due to acquisitions, improvements and other additions made to real estate. Schedule of Tax Effects of Temporary Differences and Carryforwards of the TRSs Included in Net Deferred Tax Assets Schedule of Deferred Tax Assets and Liabilities [Table Text Block] Distributions in excess of investments in unconsolidated joint ventures 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. Leasing revenue - fixed payments Operating Lease, Lease Income, Lease Payments Towne Mall Towne Mall [Member] Represents the information pertaining to real estate property of the entity, Towne Mall. Product and Service [Domain] Product and Service [Domain] Propcor II Associates, LLC—Boulevard Shops Propcor II Associates, LLC Boulevard Shops [Member] Represents the joint venture, Propcor II Associates, LLC Boulevard Shops. Type of Adoption [Domain] Type of Adoption [Domain] REAL ESTATE AND ACCUMULATED DEPRECIATION SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items] Redemption of noncontrolling interests Noncontrolling Interest, Decrease from Redemptions or Purchase of Interests Revenue from External Customers by Products and Services [Table] Revenue from External Customers by Products and Services [Table] Variable Rate [Domain] Variable Rate [Domain] Entity Shell Company Entity Shell Company Building and Improvements SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost of Building and Improvements Mortgage notes payable Secured Debt Share and Unit-based Compensation Plans Share-based Payment Arrangement [Policy Text Block] Total stockholders' equity Stockholders' Equity Attributable to Parent Estrella Falls Estrella Falls, The Market at [Member] Represents the information pertaining to real estate property of the entity, Estrella Falls, the Market at. Market-indexed Long Term Incentive Plan, Market-based [Member] Long Term Incentive Plan, Market-based [Member] Plan Name [Axis] Plan Name [Axis] Disposal Group Name [Domain] Disposal Group Name [Domain] Number of extension options Line of Credit Facility, Number of Extension Periods Line of Credit Facility, Number of Extension Periods Write-down of assets Impairment losses Impairment of Real Estate 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. Equity Component [Domain] Equity Component [Domain] Debt premium Debt Instrument, Unamortized Discount (Premium), Net Common Stock Common Stock [Member] Interest rate on debt (as a percent) Debt Instrument, Interest Rate, Stated Percentage Receivable Type [Domain] Receivable [Domain] 2022 Lessor, Operating Lease, Payments to be Received, Three Years Unamortized deferred finance costs Deferred finance cost, net Debt Issuance Costs, Net Leasing revenue Lease Income Numerator Net Income (Loss) Available to Common Stockholders, Basic [Abstract] Current Fiscal Year End Date Current Fiscal Year End Date Schedule of Derivative Outstanding Schedule of Derivative Instruments [Table Text Block] Share-based Compensation Arrangement by Share-based Payment Award, Options, Additional Disclosures [Abstract] Weighted Average Exercise Price (in dollars per share) Share-based Compensation Arrangement by Share-based Payment Award, Options, Additional Disclosures [Abstract] Investments in Unconsolidated Joint Ventures Collaborative Arrangement Equity Method Investments and Joint Ventures Disclosure [Text Block] Other land and development properties Other Assets and Development Properties [Member] Represents information pertaining to other real estate assets and development properties. 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 Additional paid-in capital Additional Paid in Capital, Common Stock Westcor/Queen Creek LLC Westcor/Queen Creek LLC [Member] Represents the joint venture, Westcor/Queen Creek LLC. Provision for doubtful accounts Accounts Receivable, Credit Loss Expense (Reversal) Below Market Below Market Lease, Net, Amortization Income, Fiscal Year Maturity [Abstract] Land Land San Tan Village Regional Center San Tan Village Regional Center [Member] Represents the information pertaining to real estate property of the entity, SanTan Village Regional Center. Jaren Associates #4 Jaren Associates 4 [Member] Represents the joint venture, Jaren Associates #4. Ownership percentage Joint Venture Ownership Percent Joint Venture Ownership Percent Reconciliation of Income Tax Provision of the TRSs to the Amount Computed by Applying the Federal Corporate Tax Rate Schedule of Effective Income Tax Rate Reconciliation [Table Text Block] Share and Unit-based Plans Share-based Payment Arrangement [Text Block] Macerich HHF Centers LLC—Various Properties Macerich HHF Centers LLC—Various Properties [Member] Macerich HHF Centers LLC—Various Properties [Member] Total liabilities Equity Method Investment, Summarized Financial Information, Liabilities 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. Threshold ownership percentage above which to use equity method of accounting only if no controlling financial interest Threshold Ownership Percentage for Equity Method Accounting only if, No Controlling Financial Interest Represents the threshold percentage of ownership of common stock or equity participation in an investee above which the equity method of accounting is still applied only if the entity does not have a controlling financial interest in the investee. Forfeited (shares) Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Forfeited in Period Net cash used in financing activities Net Cash Provided by (Used in) Financing Activities Schedule of Segment Reporting Information, by Segment [Table] Schedule of Segment Reporting Information, by Segment [Table] SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation Disclosure [Abstract] SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation Disclosure [Abstract] Repurchased shares (in dollars per share) Treasury Stock Acquired, Average Cost Per Share Ownership % Equity Method Investment, Ownership Percentage September 1, 2019 September 1, 2019 [Member] September 1, 2019 Total lease liabilities Operating Lease, Liability Deferred Charges Deferred Charges, Policy [Policy Text Block] Proceeds from share and unit-based plans Proceeds from Stock Plans Summary of Activity of SARs Awards Share-based Payment Arrangement, Stock Appreciation Right, Activity [Table Text Block] Commitments and Contingencies Disclosure [Abstract] Commitments and Contingencies Disclosure [Abstract] Long term debt including debt premium Carrying value of term loan Long-term Debt, Gross Finance Lease, Liability, Payment, Due [Abstract] Finance Lease, Liability, Payment, Due [Abstract] Liabilities Variable Interest Entity, Consolidated, Carrying Amount, Liabilities Mortgage loans payable on real estate Bank and other notes payable Debt Instrument [Line Items] Subsequent event Subsequent Event [Member] 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. The Market at Estrella Falls LLC The Market at Estrella Falls [Member] Represents the joint venture, The Market at Estrella Falls LLC. Superstition Springs Power Center Superstition Springs Power Center [Member] Represents the information pertaining to real estate property of the entity, Superstition Springs Power Center. Deferred rent receivables due to straight-line rent adjustments Deferred Rent Receivables, Net Name of Property [Axis] Name of Property [Axis] Total Fair Value Measurement Assets, Fair Value Disclosure 2024 Finite-Lived Intangible Assets, Amortization Expense, Year Five Commitments and contingencies Commitments and Contingencies Statement of Stockholders' Equity [Abstract] Statement of Stockholders' Equity [Abstract] Stockholders' Equity Note [Abstract] Stockholders' Equity Note [Abstract] Cover page. Number of forms of in-place operating lease intangible assets and liabilities Number of Forms of in Place Operating Leases Represents the number of forms that can be taken by the identifiable intangible assets and liabilities relating to in-place operating leases acquired. Cascade and Northgate Malls Cascade and Northgate Malls [Member] Cascade and Northgate Malls [Member] Distributions to noncontrolling interests Noncontrolling Interest, Decrease from Distributions to Noncontrolling Interest Holders Related Party Transaction [Domain] Related Party Transaction [Domain] Pacific View Pacific View [Member] Represents the information pertaining to real estate property of the entity, Pacific View. Less imputed interest Lessee, Operating Lease, Liability, Undiscounted Excess Amount Trading Symbol Trading Symbol Thereafter Finance Lease, Liability, Payments, Due after Year Five 2023 Below Market Lease, Amortization Income, Year Five Document Period End Date Document Period End Date Above Market Above Market Leases [Member] Phantom stock units Phantom Share Units (PSUs) [Member] Segment Reporting Information [Line Items] Segment Reporting Information [Line Items] Cumulative effect of adoption Cumulative Effect of New Accounting Principle in Period of Adoption 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. Real Estate and Accumulated Depreciation, by Property [Table] SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, by Property [Table] Ordinary income (as a percent) Common Stock, Dividends, Ordinary Income, Percentage Represents the ordinary income distributed as dividend, as a percentage of total dividends paid. Total revenues Equity Method Investment, Summarized Financial Information, Revenue Common stock, $0.01 par value, 250,000,000 shares authorized, 141,407,650 and 141,221,712 shares issued and outstanding at December 31, 2019 and 2018, respectively Common Stock, Value, Issued Eastland Mall Eastland Mall [Member] Represents the information pertaining to real estate property of the entity, Eastland Mall. Dividend yield (as a percent) Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions, Expected Dividend Rate Management fees as a percentage of gross monthly rental revenue Management Fee Revenue as Percentage of Gross Monthly Rental Revenue Represents the revenue earned for operating and managing third-party properties, expressed as a percentage of the gross monthly rental revenue of the properties managed. Debt Instrument, Name [Domain] Debt Instrument, Name [Domain] La Cumbre Plaza La Cumbre Plaza [Member] Represents the information pertaining to real estate property of the entity, La Cumbre Plaza. Northwestern Mutual Life (NML) Northwestern Mutual Life [Member] Represents Northwestern Mutual Life ("NML"), considered a related party because it is a joint venture partner of the entity. Basis of Presentation Basis of Accounting, Policy [Policy Text Block] Investments in unconsolidated joint ventures: Schedule of Equity Method Investments [Line Items] Subsequent Events Subsequent Events [Text Block] Operating expenses Cost of Goods and Services Sold Total undiscounted rental payments Finance Lease, Liability, Payment, Due Schedule of Future Minimum Rental Payments by the Company Lessor, Operating Lease, Payments to be Received, Maturity [Table Text Block] Expenses: Equity Method Investment, Summarized Financial Information, Expenses [Abstract] -- None. No documentation exists for this element. -- Total Real Estate Investment Property, at Cost Co-venture expense Co-venture expense Income (Loss) from Co-venture Operations This item represents the entity's proportionate share for the period of the net income or loss related to its profit-sharing arrangement. Exercised (shares) Share-based Compensation Arrangement by Share-based Payment Award, Non-Option Equity Instruments, Exercised MS Portfolio LLC MS Portfolio LLC [Member] MS Portfolio LLC [Member] Net income Net income Net Income (Loss), Including Portion Attributable to Noncontrolling Interest Deferred lease costs, amortization period (in years) Deferred Leasing Costs Amortization, Period Represents the initial term of tenant lease agreements over which leasing costs are deferred and amortized. Weighted average remaining lease term, finance leases Finance Lease, Weighted Average Remaining Lease Term Northgate Mall Northgate Mall [Member] Represents the information pertaining to real estate property of the entity, Northgate Mall. Freehold Raceway Mall Freehold Raceway Mall [Member] Represents the information pertaining to real estate property of the entity, Freehold Raceway Mall. Entity Address, Postal Zip Code Entity Address, Postal Zip Code Income Statement [Abstract] Income Statement [Abstract] Terminal capitalization rate Financing Arrangement, Terminal Capitalization Rate Financing Arrangement, Terminal Capitalization Rate Amortization expense Amortization of Intangible Assets Mortgage Notes Payable Mortgage Notes Payable Disclosure [Text Block] Share and unit based compensation (shares) Incremental Common Shares Attributable to Dilutive Effect of Share-based Payment Arrangements Management Estimates Use of Estimates, Policy [Policy Text Block] Total Cost Net of Accumulated Depreciation SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Investment Property, Net Green Acres Mall Green Acres Mall Mortgage [Member] Green Acres Mall Mortgage [Member] Fresno Fashion Fair Fresno Fashion Fair [Member] Represents the information pertaining to real estate property of the entity, Fresno Fashion Fair. Dispositions and retirements Real Estate Cost of Real Estate Sold or Retired The carrying amount of real estate sold or retired during the period. 2023 Finite-Lived Intangible Assets, Amortization Expense, Year Four Schedule of Real Estate Properties Schedule of Real Estate Properties [Table Text Block] Schedule of Defined Contribution Plans Disclosures [Table] Schedule of Defined Contribution Plans Disclosures [Table] Disclosures about an individual defined contribution pension plan or an other postretirement defined contribution plan. Investments in unconsolidated joint ventures Assets—Investments in unconsolidated joint ventures Equity Method Investments Buildings and improvements Building and Building Improvements [Member] Finance lease costs: Lease, Finance Cost [Abstract] Lease, Finance Cost REIT general and administrative expenses General and Administrative Expense Local Phone Number Local Phone Number Change in tax rates Effective Income Tax Rate Reconciliation, Change in Enacted Tax Rate, Amount Total liabilities and equity Liabilities and Equity January 1, 2018 January 1, 2018 [Member] January 1, 2018 [Member] Finite-Lived Intangible Assets by Major Class [Axis] Finite-Lived Intangible Assets by Major Class [Axis] Organization Nature of Operations [Text Block] Limited partnership interest of the operating partnership (as a percent) Noncontrolling Interest, Ownership Percentage by Noncontrolling Owners Danbury Fair Mall Danbury Fair Mall [Member] Represents the information pertaining to real estate property of the entity, Danbury Fair Mall. Share and unit-based plans Share-based Compensation Arrangement by Share-based Payment Award [Line Items] Equity Components [Axis] Equity Components [Axis] Tucson La Encantada Tucson La Encantada [Member] Represents the information pertaining to real estate property of the entity, Tucson La Encantada3. Above Market Finite-Lived Intangible Assets, Net, Amortization Expense, Fiscal Year Maturity [Abstract] Variable Rate [Axis] Variable Rate [Axis] Employee Benefit Plans Pension and Other Postretirement Benefits Disclosure [Text Block] Loans and Leases Receivable Disclosure [Abstract] Loans and Leases Receivable Disclosure [Abstract] Outside partner interest of the operating partnership Outside partner interest of the operating partnership Joint Venture Ownership Percent by Other Owners Joint Venture Ownership Percent by Other Owners Earnings per common share attributable to common stockholders: EPS—net income attributable to common stockholders: Earnings Per Share, Basic and Diluted [Abstract] Diluted (shares) Denominator for diluted EPS—weighted average number of common shares outstanding (shares) Weighted Average Number of Shares Outstanding, Diluted Fair Value Derivative, Fair Value, Net North Bridge Chicago LLC North Bridge Chicago LLC [Member] Represents the joint venture, North Bridge Chicago LLC. Fair Value of Financial Instruments Fair Value of Financial Instruments, Policy [Policy Text Block] Common stock, shares issued Balance (in shares) Balance (in shares) Common Stock, Shares, Issued Right-of-use assets, net Operating Lease, Right-of-Use Asset Schedule of Joint Ventures [Table] Schedule of Joint Ventures [Table] A schedule providing information pertaining to the joint venture interests of the entity. Queens Center Queens Center [Member] Represents the joint venture, Queens Center. 2021 Finance Lease, Liability, Payments, Due Year Two Shares or Units Units Units Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Number of Shares [Roll Forward] Replacement collateral Collateral Pledged [Member] Schedule of Estimated Amortization of Allocated Values of Above and Below-market Leases for the Next Five Years and Thereafter Schedule of Above Market Lease and Below Market Lease Future Amortization [Table Text Block] Tabular disclosure of the allocated values of above and below-market leases expected to be amortized into minimum rents on a straight-line basis over the individual remaining lease terms. Land SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost of Land Oaks, The The Oaks One Mortgage [Member] Mortgage note payable on the Oaks property pledged as collateral. Capitalized share and unit-based compensation costs Share-based Payment Arrangement, Amount Capitalized Fashion Outlets of Chicago Fashion Outlets of Chicago Mortgage [Member] Mortgage note payable on the Fashion Outlets of Chicago property pledged as collateral. Disposal Groups, Including Discontinued Operations [Table] Disposal Groups, Including Discontinued Operations [Table] Accounts payable and accrued expenses Accounts Payable and Accrued Liabilities Victor Valley, Mall of Victor Valley, Mall of [Member] Represents the information pertaining to real estate property of the entity, Victor Valley, Mall of. Schedule of Components of Distributions Made to Common Stockholders on a Per Share Basis Schedule of Distributions made to Common Stockholders on Per Share Basis [Table Text Block] Tabular disclosure of distributions paid to common stockholders on a per share basis, consisting of ordinary income, capital gains, unrecaptured Section 1250 gain and return of capital or a combination thereof. Accumulated amortization Less accumulated amortization Finite-Lived Intangible Assets, Accumulated Amortization Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items] Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items] Adjustments to reconcile net income to net cash provided by operating activities: Adjustments to Reconcile Net Income (Loss) to Cash Provided by (Used in) Operating Activities [Abstract] New Accounting Pronouncements or Change in Accounting Principle [Line Items] New Accounting Pronouncements or Change in Accounting Principle [Line Items] Entity Small Business Entity Small Business Entity File Number Entity File Number Ownership [Axis] Ownership [Axis] Number of geographic areas in which the Company operates Number of Countries in which Entity Operates Dividends, percent Dividends, by Type Alternative [Abstract] Second vesting period Share-based Payment Arrangement, Tranche Two [Member] Stock repurchases Stock Repurchased During Period, Value January 1, 2017 January 1, 2017 [Member] January 1, 2017 [Member] Thereafter Below Market Lease, Amortization Income, after Year Five Product and Service [Axis] Product and Service [Axis] Depreciation and amortization Depreciation, Depletion and Amortization Liabilities and partners' capital: Equity Method Investment, Summarized Financial Information, Liabilities and Equity [Abstract] Chandler Fashion Center Chandler Fashion Center Mortgage [Member] Mortgage note payable on the Chandler Fashion Center property pledged as collateral. Proceeds from sale Proceeds from Divestiture of Businesses Components of tenant and other receivables, net Accounts, Notes, Loans and Financing Receivable [Line Items] Contingent liability under letters of credit Letters of Credit Outstanding, Amount Allocated value, net Below Market Lease, Net Variable Interest Entities [Axis] Variable Interest Entities [Axis] Partnership unit Partnership Units [Member] Represents units or equivalent units of ownership interest in an LLC or LP. 2020 Long-term Debt, Maturities, Repayments of Principal in Next Twelve Months Nonrecurring Fair Value, Nonrecurring [Member] Freehold Raceway Mall Freehold Raceway Mall Mortgage [Member] Mortgage note payable on the Freehold Raceway Mall property pledged as collateral. Exercised (in shares) Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercises in Period Schedule of Ownership Interest in Joint Ventures Equity Method Investments [Table Text Block] Tysons Corner LLC Tysons Corner LLC [Member] Represents the joint venture, Tysons Corner LLC. Revenues Revenue from External Customer [Line Items] LIABILITIES AND EQUITY: Liabilities and Equity [Abstract] Conversion of noncontrolling interests to common shares Stock Issued During Period, Value, Conversion of Units Credit Facility [Domain] Credit Facility [Domain] Income Taxes Income Tax Disclosure [Text Block] Los Angeles Premium Outlets, second stage Los Angeles Premium Outlets, Second Stage [Member] Los Angeles Premium Outlets, Second Stage [Member] Statement of Cash Flows [Abstract] Statement of Cash Flows [Abstract] Weighted average number of common shares outstanding: Denominator Weighted Average Number of Shares Outstanding, Diluted [Abstract] Total interest expense Interest Expense Victor Valley, Mall of Mall of Victor Valley Mortgage [Member] Mortgage note payable on the Mall of Victor Valley property pledged as collateral. Weighted average remaining lease term, operating leases Operating Lease, Weighted Average Remaining Lease Term Management Companies Management fees Management Service [Member] Investment in unconsolidated joint ventures: Investments in and Advance to Affiliates, Subsidiaries, Associates, and Joint Ventures [Abstract] January 1, 2019 January 1, 2019 [Member] January 1, 2019 [Member] Maximum shares authorized under plan (shares) Share-based Compensation Arrangement by Share-based Payment Award, Number of Shares Authorized Leases [Abstract] Leases [Abstract] Finite-Lived Intangible Assets, Major Class Name [Domain] Finite-Lived Intangible Assets, Major Class Name [Domain] Subsequent events Subsequent Event [Line Items] Minimum Low end of range Minimum [Member] Redevelopment construction loan Redevelopment Construction Loan [Member] Redevelopment Construction Loan Repurchased shares Treasury Stock, Value, Acquired, Cost Method 2024 Long-term Debt, Maturities, Repayments of Principal in Year Five Balance at beginning of year (shares) Balance at end of year (shares) Share-based Compensation Arrangement by Share-based Payment Award, Non-Option Equity Instruments, Outstanding, Number Deferred Costs, Capitalized, Prepaid, and Other Assets Disclosure [Abstract] Deferred Costs, Capitalized, Prepaid, and Other Assets Disclosure [Abstract] Pacific View Pacific View Mortgage [Member] Mortgage note payable on the Pacific View property pledged as collateral. Leasing revenue Equity Method Investment, Summarized Financial Information, Minimum Lease Revenue The total amount of lease revenue recognized for the period for which the lessee was obligated under leasing arrangements regardless of any other events or conditions, reported by an equity method investment of the entity. Finite-Lived Intangible Assets [Line Items] Finite-Lived Intangible Assets [Line Items] Percentage of eligible compensation, matched 50% by employer (as a percent) Defined Contribution Plan, Employer Match, Employee Contribution, Level Two Represents the second level of employee contributions (percentage of compensation) which are matched by the employer. Noncontrolling Interest [Line Items] Noncontrolling Interest [Line Items] Fashion Outlets of Chicago Fashion Outlets of Chicago [Member] Represents the information pertaining to real estate property of the entity, Fashion Outlets of Chicago. Fair Value, Measurement Frequency [Domain] Measurement Frequency [Domain] Redemption value of outstanding OP Units not owned by the Company Minority Interest Redemption Value Represents the aggregate redemption value for the noncontrolling interest. Above-Market Leases Above Market Leases [Abstract] Above Market Leases [Abstract] Total revenues Revenues Revenues Return of capital (as a percent) Common Stock, Dividends, Return of Capital Distribution, Percentage Represents the return of capital distributed as dividend, as a percentage of total dividends paid. 500 North Michigan Avenue North Michigan Avenue 500 [Member] Represents the information pertaining to 500 North Michigan Avenue. Dividends and distributions Payments of Ordinary Dividends, Common Stock Maximum price of common stock available to be issued Maximum Aggregate Common Stock Offer Price Maximum Aggregate Common Stock Offer Price The Plan Defined Contribution Plan [Member] Represents the defined contribution plan for employees of the reporting entity. Stock awards and units Stock Awards and Stock Units [Member] Stock awards and units awarded by an entity to their employees as a form of an incentive compensation. Disposal Group Name [Axis] Disposal Group Name [Axis] Revenues: Equity Method Investment, Summarized Financial Information, Revenues [Abstract] -- None. No documentation exists for this element. -- Monthly debt service Debt Instrument, Periodic Payment Country Club Plaza KC Partners LLC Country Club Plaza KC Partners LLC [Member] Country Club Plaza KC Partners LLC [Member] Ordinary income (in dollars per share) Common Stock, Dividends, Ordinary Income, Per Share Represents the ordinary income distributed as dividend per common stock share. Stock repurchase (in shares) Stock Repurchased During Period, Shares 2021 Lessor, Operating Lease, Payments to be Received, Two Years Line of credit Long-term Line of Credit Real Estate [Domain] Real Estate [Domain]