75000 - Document - Document and Entity Information link:presentationLink link:calculationLink link:definitionLink 75010 - Statement - CONSOLIDATED BALANCE SHEETS link:presentationLink link:calculationLink link:definitionLink 75020 - Statement - CONSOLIDATED BALANCE SHEETS (Parenthetical) link:presentationLink link:calculationLink link:definitionLink 75030 - Statement - CONSOLIDATED STATEMENTS OF OPERATIONS AND COMPREHENSIVE (LOSS) INCOME link:presentationLink link:calculationLink link:definitionLink 75040 - Statement - CONSOLIDATED STATEMENTS OF EQUITY link:presentationLink link:calculationLink link:definitionLink 75050 - Statement - CONSOLIDATED STATEMENTS OF CASH FLOWS link:presentationLink link:calculationLink link:definitionLink 995455 - Disclosure - Nature of Business and Financial Statement Presentation link:presentationLink link:calculationLink link:definitionLink 995465 - Disclosure - Investments in and Advances to Joint Ventures link:presentationLink link:calculationLink link:definitionLink 995475 - Disclosure - Other Assets and Intangibles, net link:presentationLink link:calculationLink link:definitionLink 995485 - Disclosure - Leases link:presentationLink link:calculationLink link:definitionLink 995495 - Disclosure - Transactions with Curbline Properties link:presentationLink link:calculationLink link:definitionLink 995505 - Disclosure - Impairment Charges link:presentationLink link:calculationLink link:definitionLink 995515 - Disclosure - Earnings Per Share link:presentationLink link:calculationLink link:definitionLink 995525 - Disclosure - Subsequent Events link:presentationLink link:calculationLink link:definitionLink 995535 - Disclosure - Nature of Business and Financial Statement Presentation (Policies) link:presentationLink link:calculationLink link:definitionLink 995545 - Disclosure - Nature of Business and Financial Statement Presentation (Tables) link:presentationLink link:calculationLink link:definitionLink 995555 - Disclosure - Investments in and Advances to Joint Ventures (Tables) link:presentationLink link:calculationLink link:definitionLink 995565 - Disclosure - Other Assets and Intangibles, net (Tables) link:presentationLink link:calculationLink link:definitionLink 995575 - Disclosure - Leases (Tables) link:presentationLink link:calculationLink link:definitionLink 995585 - Disclosure - Impairment Charges (Tables) link:presentationLink link:calculationLink link:definitionLink 995595 - Disclosure - Earnings Per Share (Tables) link:presentationLink link:calculationLink link:definitionLink 995605 - Disclosure - Nature of Business and Financial Statement Presentation - Additional Information (Detail) link:presentationLink link:calculationLink link:definitionLink 995615 - Disclosure - Nature of Business and Financial Statement Presentation - Non-cash Investing and Financing Activities (Detail) link:presentationLink link:calculationLink link:definitionLink 995625 - Disclosure - Investments in and Advances to Joint Ventures - Additional Information (Detail) link:presentationLink link:calculationLink link:definitionLink 995635 - Disclosure - Investments in and Advances to Joint Ventures - Condensed Combined Financial Information of Company's Unconsolidated Joint Venture Investments (Detail) link:presentationLink link:calculationLink link:definitionLink 995645 - Disclosure - Investments in and Advances to Joint Ventures - Condensed Combined Statements of Operations of Unconsolidated Joint Venture Investments (Detail) link:presentationLink link:calculationLink link:definitionLink 995655 - Disclosure - Other Assets and Intangibles, net - Components of Other Assets and Intangibles (Detail) link:presentationLink link:calculationLink link:definitionLink 995665 - Disclosure - Other Assets and Intangibles, net - Components of Other Assets and Intangibles (Detail) 2 link:presentationLink link:calculationLink link:definitionLink 995675 - Disclosure - Other Assets and Intangibles, net - Components of Other Assets and Intangibles (Parenthetical) (Detail) link:presentationLink link:calculationLink link:definitionLink 995685 - Disclosure - Other Assets and Intangibles, net - Summary of Amortization Expense Related to the Intangibles, Excluding Above and Below-Market Leases (Detail) link:presentationLink link:calculationLink link:definitionLink 995695 - Disclosure - Leases - Summary of Disaggregation of Lease Income (Detail) link:presentationLink link:calculationLink link:definitionLink 995705 - Disclosure - Transactions with Curbline Properties - Additional Information (Detail) link:presentationLink link:calculationLink link:definitionLink 995715 - Disclosure - Impairment Charges - Additional Information (Detail) link:presentationLink link:calculationLink link:definitionLink 995725 - Disclosure - Impairment Charges - Impairment Charges Measured at Fair Value of Real Estate on Non-Recurring Basis (Detail) link:presentationLink link:calculationLink link:definitionLink 995735 - Disclosure - Impairment Charges - Summary of Significant Unobservable Inputs (Details) link:presentationLink link:calculationLink link:definitionLink 995745 - Disclosure - Earnings Per Share - Reconciliation of Net Income (Loss) and Number of Common Shares Used in Computations of "Basic" EPS and "Diluted" EPS (Detail) link:presentationLink link:calculationLink link:definitionLink 995755 - Disclosure - Earnings Per Share - Additional Information (Detail) link:presentationLink link:calculationLink link:definitionLink 995765 - Disclosure - Subsequent Events - Additional Information (Detail) link:presentationLink link:calculationLink link:definitionLink Common Stock, Dividends, Per Share, Cash Paid Common share dividends paid per share Condensed Income Statement [Table Text Block] Condensed Combined Statements of Operations of Unconsolidated Joint Venture Investments Consolidated Assets, Fair Value Fair value of long lived assets held and used and held for sale. Impaired Long Lived Assets Held And Used Fair Value Disclosure Long-lived assets held and used Preferred Stock, Shares Issued Cumulative redeemable preferred shares, shares issued Interest Expense, Operating and Nonoperating Interest expense Interest expense Interest Expense, Total Amounts Payable To Curbline Amounts payable to curbline. Amounts payable to curbline Asset, Impairment Loss [Abstract] Commitments and Contingencies Commitments and contingencies Commitments and Contingencies, Total Weighted Average Number of Shares Outstanding, Diluted Diluted—Average shares outstanding Unobservable input rate Fair value input rate. Fair Value Input Rate Preferred Stock, Shares Outstanding Cumulative redeemable preferred shares, shares outstanding Preferred Stock, Shares Outstanding, Beginning Balance Preferred Stock, Shares Outstanding, Ending Balance Revenue Revenue and other income Fee And Other Income Earned From Unconsolidated Joint Ventures Fee and other income earned from unconsolidated joint ventures. Investment, Name [Axis] Investment, Name Earnings Per Share Line Items. Schedule Of Earnings Per Share [Line Items] Schedule Of Earnings Per Share [Line Items] SITC Amounts Payable to SITE SITC amounts payable to SITE. Amounts payable to SITE Centers Common Stock, Shares, Issued Common shares, shares issued Income Tax Expense (Benefit) Income Tax Expense (Benefit), Total Tax benefit (expense) of taxable REIT subsidiary and state franchise and income taxes Fair Value, Assets and Liabilities Measured on Nonrecurring Basis, Valuation Techniques [Table Text Block] Summary of Significant Unobservable Inputs Extinguishment of Debt, Amount Debt extinguishment costs Debt extinguishment costs Impaired Long-Lived Assets Held and Used, Asset Name [Domain] Other Property [Member] Other Property [Member] Restricted Stock Units (RSUs) [Member] Restricted Stock units ("RSUs") [Member] Shared Services Agreement [Member] Shared Services Agreement. Shared Services Agreement [Member] Intangible Asset, Finite-Lived, Class [Domain] Finite-Lived Intangible Assets, Major Class Name Impairment charges Asset, Impairment Loss Impairment charges Asset Impairment Charges, Total Treasury Stock, Common, Value Less: Common shares in treasury at cost: 5,510 and 4,847 shares at June 30, 2026 and December 31, 2025, respectively Payments to Develop Real Estate Assets Real estate developed and improvements to operating real estate Subsequent Event Type [Domain] Amounts receivable from Curbline Accounts Receivable from Related Party Accounts receivable from related party. Measurement Input, Terminal Capitalization Rate [Member] Measurement input, terminal capitalization rate. Terminal Capitalization Rate Nonoperating Income (Expense) Total other income (expense) Other income (expense), net Schedule of Long-Term Debt Instruments [Table] Debt Instrument [Table] Repayment of mortgage debt Repayments Of Term Loan And Mortgage Debt Repayments of term loan and mortgage debt. General and Administrative Expense General and administrative General and Administrative Expense, Total Income Statement [Abstract] Land Land Related and Nonrelated Parties [Domain] Intangible Asset, Finite-Lived [Table] Schedule Of Finite Lived Intangible Assets [Table] Total, Basic Earnings Per Share, Basic Basic: Document Period End Date Document Period End Date Document Information [Table] Document Information [Table] Total intangible assets Intangible Asset, Finite-Lived, after Accumulated Amortization Finite-Lived Intangible Assets, Net, Beginning Balance Finite-Lived Intangible Assets, Net, Ending Balance Total intangible assets, net Debt Instrument [Line Items] Debt Instrument [Line Items] Other Agreement [Member] Other agreement. Other [Member] Common Stock, Shares Authorized Common shares, shares authorized Statement of Stockholders' Equity [Abstract] Long-Lived Asset, Held and Used, Impairment Loss, Statement of Income or Comprehensive Income [Extensible Enumeration] Income (Loss) from Equity Method Investments Equity in net loss of joint ventures Equity in net loss of joint ventures Equity in net loss of joint ventures Dividends Payable Dividends payable Dividends declared, but not paid Shopping centers owned Number of Real Estate Properties Number of convenience centers spin-off Represents amount of gain (loss) on sale of interest in joint venture. Gain Loss On Sale Of Interest In Joint Venture Gain on sale of joint venture interests Gain on sale of joint venture interests Equity Method Investments and Joint Ventures [Abstract] Unconsolidated joint ventures. Unconsolidated Joint Ventures [Member] Unconsolidated Joint Ventures [Member] Rental income. Rental Income Rental income Assets Total assets Title of 12(b) Security Title of 12(b) Security Proceeds from Equity Method Investment, Distribution, Return of Capital Distributions Distributions from unconsolidated joint venture Schedule of Equity Method Investments [Line Items] Schedule Of Equity Method Investments [Line Items] Reclassifications Reclassification, Comparability Adjustment [Policy Text Block] Antidilutive Securities, Name [Domain] Real Estate Tax Expense Real estate taxes Real estate tax expenses Disposition [Member] Disposition. Disposition [Member] Payments for (Proceeds from) Productive Assets Payments for (Proceeds from) Productive Assets, Total Cash Proceeds of sale of other property Cash Proceeds of sale of other property This item represents the amortization of the difference between the amount at which an investment accounted for under the equity method of accounting is carried on the balance sheet and the amount of the underlying equity in net assets reporting entity has in the investee. Amortization Of Basis Differentials Basis differential adjustments Tenant Relationships [Member] Customer Relationships [Member] Payments to Acquire Interest in Joint Venture Equity contributions to joint ventures Capitalized costs Other Assets [Abstract] Transactions with Curbline Properties Transactions with curbline properties. Transactions with Curbline Properties Stockholders' Equity Attributable to Parent, Ending Balance Equity, Attributable to Parent Stockholders' Equity Attributable to Parent, Beginning Balance Total equity Valuation Approach and Technique [Domain] Treasury Stock, Common [Member] Treasury Stock at Cost [Member] Collaborative Arrangement and Arrangement Other than Collaborative [Domain] Earnings Per Share Earnings Per Share [Text Block] Interest Income, Other Interest income Amortization Income Of Intangible Assets Excluding Above And Below Market Leases Amortization income of intangible assets excluding above and below market leases. Amortization income Other assets excluding intangible assets. Other Assets Excluding Intangible Assets [Abstract] Other assets: Below Market Lease, Gross Below-market leases, Liability Construction in Progress Expenditures Incurred but Not yet Paid Accounts payable related to construction in progress Real Estate [Domain] Preferred Stock, No Par Value Cumulative redeemable preferred shares, par value Entity Interactive Data Current Entity Interactive Data Current Impaired Long-Lived Assets Held and Used by Type [Axis] Nature of business. Nature Of Business Policy [Text Block] Nature of Business Collaborative Arrangement and Arrangement Other than Collaborative [Line Items] Common Stock, Value, Issued Common shares, with par value, $0.10 stated value; 75,000,000 shares authorized; 52,480,384 and 52,467,187 shares issued at June 30, 2026 and December 31, 2025, respectively Schedule of Earnings Per Share, Basic and Diluted [Table Text Block] Reconciliation of Net Income (Loss) and Number of Common Shares Used in Computations of "Basic" EPS and "Diluted" EPS Basis differentials Equity Method Investment, Difference Between Carrying Amount and Underlying Equity Liabilities Total liabilities Below Market Lease, Net Less: Below-market leases Below Market Lease, Net, Total Below Market Lease, Net, Beginning Balance Below Market Lease, Net, Ending Balance Below-market leases, net (other liabilities) Gain on Dispositions Gain on dispositions. Gross proceeds from sale of real estate assets Fair Value, Inputs, Level 3 [Member] Level 3 [Member] Above-Market Leases [Member] Above Market Leases [Member] Revenue from contract with customer real estate transactions. Revenue From Contract With Customer Real Estate Transactions Policy [Text Block] Disposition of Real Estate Summary of significant accounting policies. Summary Of Significant Accounting Policies [Line Items] Summary Of Significant Accounting Policies [Line Items] Operating Expenses Operating expenses Total rental operation expenses Common Stock, Dividends, Per Share, Declared Common share dividends declared per share Revenues [Abstract] Revenues from operations: Market capitalization rate. Market Capitalization Rate [Member] Market Capitalization Rate Gain on disposition of real estate, net Gain (Loss) on Sale of Properties Gain on disposition of real estate, net Gain on dispositions Fee Percentage of Aggregate Amount of Gross Revenue Fee percentage of aggregate amount of gross revenue. Fee percentage of aggregate amount of gross revenue Operating Lease, Lease Income, Statement of Income or Comprehensive Income [Extensible Enumeration] Intangible Asset, Finite-Lived, Accumulated Amortization Accumulated Amortization Accumulated Amortization Accumulated Amortization Other Assets, Miscellaneous Other assets Other Assets, Miscellaneous, Total Operating Costs and Expenses Operating and maintenance Operating Costs and Expenses, Total Investment Building and Building Improvements Buildings Investment Building and Building Improvements, Total Subsequent Events Subsequent Events [Text Block] Fair Value Hierarchy and NAV [Axis] Net income Income (Loss) from Continuing Operations, Net of Tax, Including Portion Attributable to Noncontrolling Interest Income (loss) from continuing operations Net (loss) income Liabilities and Equity Total liabilities and equity Intangible Asset, Finite-Lived, Class [Axis] Finite-Lived Intangible Assets by Major Class Document Fiscal Period Focus Document Fiscal Period Focus Schedule of Cash Flow, Supplemental Disclosures [Table Text Block] Non-cash Investing and Financing Activities Depreciation and amortization Depreciation, Depletion and Amortization, Nonproduction Depreciation and amortization Depreciation, Depletion and Amortization, Nonproduction, Total Operating and nonoperating expenses. Operating And Nonoperating Expenses [Abstract] Expenses from operations: Operating cash distributions from joint ventures Proceeds from Equity Method Investment, Distribution Development in Process Construction in progress and land Construction in progress and land Operating Lease, Lease Income Total rental income Estimated cost of redevelopment projects Estimated Cost of Redevelopment Projects Estimated cost of redevelopment projects. Entity Current Reporting Status Entity Current Reporting Status Use of Estimates, Policy [Policy Text Block] Use of Estimates in Preparation of Financial Statements Level 1 [Member] Fair Value, Inputs, Level 1 [Member] Class of Stock Class of Stock [Domain] Real Estate, Type of Property [Axis] Document Transition Report Document Transition Report Subsequent Event [Line Items] Receivables, net Accounts and Financing Receivable, after Allowance for Credit Loss Accounts and Financing Receivable, after Allowance for Credit Loss, Total Equity in net loss This element represents the Company's share in net income or loss from investments accounted for under the equity method. Income Loss From Equity Method Investments Before Amortization Of Basis Differentials Company's share of equity in net (loss) income of joint ventures Disposal Group Name [Axis] Equity, Including Portion Attributable to Noncontrolling Interest [Abstract] SITE Centers Equity Common Stock [Member] Common Shares [Member] Nonoperating Income (Expense) [Abstract] Other income (expense): Intangible Asset, Finite-Lived, before Accumulated Amortization Finite-Lived Intangible Assets, Gross, Total Asset Weighted Average Number of Shares Outstanding, Basic Basic—Average shares outstanding Weighted Average Number of Shares Outstanding, Basic, Total Assets [Abstract] Assets Mortgage Indebtedness Total Mortgage Indebtness Mortgage debt Mortgage indebtedness Entity Central Index Key Entity Central Index Key Antidilutive Securities [Axis] Transactions and Separation of Properties [Abstract] Transactions and separation of properties. Current Fiscal Year End Date Current Fiscal Year End Date Document Quarterly Report Document Quarterly Report Gain loss on disposition of real estate net. Gain Loss On Disposition Of Real Estate Net Gain on disposition of real estate, net Disposal Group Name [Domain] Impairment of Consolidated Assets [Member] Impairment Of Consolidated Assets [Member] Impairment of consolidated assets. Fair Value, Inputs, Level 2 [Member] Level 2 [Member] Cash Provided by (Used in) Operating Activity, Including Discontinued Operation Net cash flow (used for) provided by operating activities Entity Incorporation, State or Country Code Entity Incorporation, State or Country Code Earnings Per Share, Diluted Total, Diluted Diluted: Dividends Dividends, Total Dividends declared Quantitative threshold of revenues, profit or loss and assets for identifying reportable segments Segment Reporting, Factor Identifying Reportable Segment, Description Long-Lived Asset, Held and Used, Impairment Loss Long-lived assets held and used, Total Impairment Charges Impairment charges Other Comprehensive Income (Loss), Cash Flow Hedge, Gain (Loss), after Reclassification and Tax, Total Other Comprehensive Income (Loss), Cash Flow Hedge, Gain (Loss), after Reclassification and Tax Change in cash flow hedges Amount reclassified to earnings - cash flow hedges Gain (Loss) on Sale of Other Investments Gain on other investment Six point three seven five percentage class A cumulative redeemable preferred shares. Six Point Three Seven Five Percentage Class A Cumulative Redeemable Preferred Shares [Member] 6.375% Class A Cumulative Redeemable Preferred Shares [Member] Generally recurring costs associated with continuing operations for investments accounted for under the equity method. Operating And Nonoperating Expenses Total expenses Cash flow supplemental disclosures policy. Cash Flow Supplemental Disclosures Policy Policy [Text Block] Statements of Cash Flows and Supplemental Disclosure of Non-Cash Investing and Financing Information Measurement Frequency [Domain] Real estate assets at cost before construction in progress and land. Real Estate Assets At Cost Before Construction In Progress And Land Total real estate rental property Real estate rental property, net Equity Components [Axis] Equity Components Cash Provided by (Used in) Investing Activity, Including Discontinued Operation [Abstract] Cash flow from investing activities: Schedule of antidilutive securities included in computation of dilutive earnings per share. Schedule Of Antidilutive Securities Included In Computation Of Dilutive Earnings Per Share [Table] Schedule Of Antidilutive Securities Included In Computation Of Dilutive Earnings Per Share [Table] Number of properties sold attributable to the disposal group during the reporting period. Number Of Properties Sold Number of properties sold Statement of Cash Flows [Abstract] Fixtures and Equipment, Gross Fixtures and tenant improvements Fair Value Hierarchy and NAV [Domain] Preferred Stock, Liquidation Preference Per Share Cumulative redeemable preferred shares, liquidation value Impairment Charges Measured at Fair Value of Real Estate on Non-Recurring Basis Fair Value Measurements, Nonrecurring [Table Text Block] Restricted Cash and Cash Equivalent Restricted cash Restricted Cash and Cash Equivalents, Total Condensed Combined Financial Information of Company's Unconsolidated Joint Venture Investments Condensed Balance Sheet [Table Text Block] Depreciation, Depletion and Amortization Depreciation, Depletion and Amortization, Total Depreciation and amortization In-Place Leases [Member] Leases, Acquired-in-Place, Market Adjustment [Member] In-Place Leases (Including Lease Origination Costs and Fair Market Value of Leases) [Member] Preferred Stock, Shares Authorized Cumulative redeemable preferred shares, shares authorized Income (Loss) from Continuing Operations before Equity Method Investments, Income Taxes, Noncontrolling Interest Loss before earnings from equity method investments and other items Unaudited interim financial statements. Unaudited Interim Financial Statements Policy [Text Block] Unaudited Interim Financial Statements Class of Stock [Axis] Class of Stock Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount Options to purchase common shares not included in the computation of diluted EPS Number of operating segments Number of Operating Segments AOCI Attributable to Parent [Member] Accumulated Other Comprehensive (Loss) Income [Member] Accumulated Other Comprehensive (Loss) Income [Member] Adjustment to Reconcile Net Income to Cash Provided by (Used in) Operating Activity Total adjustments Increase (Decrease) in Accounts Payable and Accrued Liabilities Net change in accounts payable and accrued expenses Increase (Decrease) in Accounts Payable and Accrued Liabilities, Total Segments Segment Reporting, Policy [Policy Text Block] Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Abstract] Measurement Input, Discount Rate [Member] Discount Rate Termination Of Deferred Compensation Plan Termination of deferred compensation plan. Termination of deferred compensation plan Real estate assets net before construction in progress and land. Real Estate Assets Net Before Construction In Progress And Land Real estate rental property, net Real estate rental property, net Intangible Asset, Goodwill and Other [Abstract] Number of shopping centers sold Number of Shopping Centers Sold During Quarter Number of shopping centers sold during quarter. Document Type Document Type Operating Lease, Lease Income [Table Text Block] Summary of Disaggregation of Lease Income Cash Provided by (Used in) Operating Activity, Including Discontinued Operation [Abstract] Cash flow from operating activities: Liabilities and Equity [Abstract] Liabilities and Equity Equity Method Investment [Table] Schedule Of Equity Method Investments [Table] Subsequent Event [Member] Subsequent Event [Member] Increase (Decrease) in Other Operating Assets and Liabilities, Net Net change in other operating assets and liabilities Increase (Decrease) in Other Operating Assets and Liabilities, Net, Total Accounts Payable to Related Party Accounts payable to related party. Amounts payable to Curbline Incremental Fair Value of Services Provided Incremental fair value of services provided. Incremental fair value of services provided to Curbline Accumulated Distributions in Excess of Net Income [Member] Accumulated Distributions in Excess of Net Income [Member] Summary of significant accounting policies. Summary Of Significant Accounting Policies [Table] Summary Of Significant Accounting Policies [Table] Securities Act File Number Entity File Number Asset, Impairment [Text Block] Impairment Charges Stock Issued During Period, Value, Restricted Stock Award, Net of Forfeitures Stock-based compensation, net Stock Issued During Period, Value, Restricted Stock Award, Net of Forfeitures, Total Condensed Combined Balance Sheets Equity Method Investment, Summarized Financial Information [Abstract] Condensed Combined Statements of Operations Organization, Consolidation and Presentation of Financial Statements Disclosure and Significant Accounting Policies [Text Block] Nature of Business and Financial Statement Presentation Entity Registrant Name Entity Registrant Name Accounting Policies [Abstract] Schedule of Other Assets and Other Liabilities [Table Text Block] Components of Other Assets and Intangibles Net Income (Loss), Including Portion Attributable to Noncontrolling Interest Net (loss) income attributable to unconsolidated joint ventures Net income (Loss) Net (loss) income Net (loss) income Proceeds from Real Estate and Real Estate Joint Ventures Proceeds from disposition of real estate Entity Address, Address Line One Entity Address, Address Line One Other Receivables Amounts payable to the Company Indicative Bid [Member] Indicative Bid. Indicative Bid Prepaid Expense Prepaid expenses Fair Value, Recurring and Nonrecurring [Table] Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Table] Entity Small Business Entity Small Business Investment, Name [Domain] Investment, Name Preferred Stock, Dividend Rate, Percentage Preferred stock dividend rate Loss on Abandoned Tenant Lease Costs Loss on abandoned tenant lease costs. Loss on abandoned tenant lease costs Other Assets Other assets, net Total other assets, net Other assets, net Equity Method Investments and Joint Ventures Disclosure [Text Block] Investments in and Advances to Joint Ventures Earnings Per Share [Abstract] Per share data: Deferred Compensation, Share-Based Payments [Member] Deferred Compensation Obligation [Member] Subsequent Event Type [Axis] Measurement Frequency [Axis] Cash Provided by (Used in) Financing Activity, Including Discontinued Operation [Abstract] Cash flow from financing activities: Entity Tax Identification Number Entity Tax Identification Number Treasury Stock, Common, Shares Treasury at cost Beginning Balance Investments in and Advance to Affiliates, Subsidiaries, Associates, and Joint Ventures Ending Balance Investments in and advances to joint ventures Investments in and advances to joint ventures Valuation Approach and Technique [Axis] Equity Component [Domain] Equity Component Comprehensive Income (Loss), Net of Tax, Including Portion Attributable to Noncontrolling Interest Comprehensive income (loss) Comprehensive (loss) income Gain On Disposition Of Real Estate, Net Gain on disposition of real estate, net. Gain on disposition of real estate, net Entity Address, City or Town Entity Address, City or Town Intangible assets, net: Intangible Asset, Finite-Lived, after Accumulated Amortization [Abstract] Measurement Input Type [Domain] Intangible Asset, Excluding Goodwill, after Accumulated Amortization [Abstract] Intangible Asset, Finite-Lived [Line Items] Finite Lived Intangible Assets [Line Items] Variable lease income Operating Lease, Variable Lease Income Undistributed Earnings (Loss) Allocated to Participating Securities, Basic Undistributed Earnings (Loss) Allocated to Participating Securities, Basic, Total Earnings attributable to unvested shares Proceeds from (repurchase of) common shares. Proceeds From Repurchase Of Common Shares Repurchase of common shares in conjunction with equity award plans Valuation Technique, Discounted Cash Flow [Member] Discounted Cash Flow Entity Common Stock, Shares Outstanding Entity Common Stock, Shares Outstanding Below Market Lease, Accumulated Amortization Below-market leases, Accumulated Amortization Below-market leases, Accumulated Amortization Below-market leases, Accumulated Amortization Entity [Domain] Amortization of intangible assets excluding above and below market leases. Amortization Of Intangible Assets Excluding Above And Below Market Leases Amortization expense Weighted Average Number of Shares Outstanding, Diluted [Abstract] Denominators – Number of Shares Statement [Table] Statement [Table] Income (Loss) from Continuing Operations before Income Taxes, Noncontrolling Interest (Loss) income before tax benefit (expense) Entity Shell Company Entity Shell Company Separation and Distributions Agreement [Member] Separation and distributions agreement. Separation and Distributions Agreement [Member] Cash Provided by (Used in) Investing Activity, Including Discontinued Operation Net cash flow provided by investing activities Statement [Line Items] Statement [Line Items] Accounts Payable and Accrued Liabilities Accounts payable and other liabilities Accounts Payable and Accrued Liabilities, Total 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] Sales Price Of Real Estate Assets Sales Price Of Real Estate Assets Gross sales price of real estate assets Sales price of real estate asset Debt Disclosure [Abstract] Cash, Cash Equivalent, Restricted Cash, and Restricted Cash Equivalent, Period Increase (Decrease), Excluding Exchange Rate Effect, Including Discontinued Operation Net increase in cash, cash equivalents and restricted cash Income loss before gain on disposition of real estate. Income Loss Before Gain On Disposition Of Real Estate (Loss) income before loss on disposition of real estate Consolidation, Policy [Policy Text Block] Principles of Consolidation Payment for Debt Extinguishment or Debt Prepayment Cost Payment of debt extinguishment costs Subsequent Events [Abstract] Lease origination costs [Member] Lease origination costs. Lease Origination Costs [Member] Earnings Per Share, Basic [Abstract] Basic Basic and diluted earnings per share: This element includes cash, cash equivalents, and restricted cash related to joint venture investments. Cash And Restricted Cash Cash and restricted cash Embedded Lease Charge The sum of all the monthly finance fees paid over the lease term Embedded Lease Charge Proceeds from disposition of joint venture Proceeds From Disposition Of Joint Venture Interests Proceeds from disposition of joint venture interests Leases [Abstract] Document Fiscal Year Focus Document Fiscal Year Focus Equity, Including Portion Attributable to Noncontrolling Interest Ending Balance Beginning Balance Total equity Accumulated equity Operating Lease, Lease Income [Abstract] Rental income: Rental income: Collaborative Arrangement and Arrangement Other than Collaborative [Table] Deposits Assets Deposits Related Party [Member] Related Party [Member] Security Exchange Name Security Exchange Name Measurement Input Type [Axis] Revenues Total revenue from operations Revenues from operations Revenues Related and Nonrelated Parties [Axis] New Accounting Pronouncements, Policy [Policy Text Block] Recently Issued Accounting Standards Entity Address, State or Province Entity Address, State or Province Accounts Receivable, after Allowance for Credit Loss Accounts receivable Accounts Receivable, after Allowance for Credit Loss, Total Operating lease ROU assets Operating Lease, Right-of-Use Asset Amendment Flag Amendment Flag Other Nonoperating Income (Expense) Other expense, net Other Nonoperating Income (Expense), Total Other income (expense), net City Area Code City Area Code Interest expense Interest Expense, Nonoperating Interest expense Interest Expense, Nonoperating, Total Organization, Consolidation and Presentation of Financial Statements [Abstract] Company's share of accumulated equity Company Share In Accumulated Equity Of Unconsolidated Joint Ventures The reporting entity's share of accumulated common equity in the combined entities in which the reporting entity accounts for the investment using the equity method of accounting. Fee and other income including revenue from contracts with customers. Fee And Other Income Including Revenue From Contracts With Customers Fee and other income Operating Expenses [Abstract] Rental operation expenses: Other Liabilities Other Liabilities, Total Other liabilities Common Stock, Par or Stated Value Per Share Common Stock, Par or Stated Value Per Share Common shares, par value Legal Entity [Axis] Cash, Cash Equivalent, Restricted Cash, and Restricted Cash Equivalent, Including Discontinued Operation Cash, cash equivalents and restricted cash, end of period Cash, cash equivalents and restricted cash, beginning of period Cash, Cash Equivalents, Restricted Cash, and Restricted Cash Equivalents, Including Disposal Group and Discontinued Operations, Total Adjustments for potentially uncollectible revenues and disputed amounts Adjustments For Potentially Uncollectible Revenues And Disputed Amounts Adjustments For Potentially Uncollectible Revenues And Disputed Amounts Collaborative Arrangement and Arrangement Other than Collaborative [Axis] Accumulated Distributions in Excess of Net Income Accumulated distributions in excess of net income Accumulated Distributions in Excess of Net Income, Total Trading Symbol Trading Symbol Equity Method Investment, Nonconsolidated Investee [Domain] Fair Value Measurement, Policy [Policy Text Block] Fair Value Measurement Subsequent Event [Table] Entity Emerging Growth Company Entity Emerging Growth Company Additional Paid-in Capital [Member] Additional Paid-in Capital [Member] Class A cumulative redeemable preferred stock. Class A Cumulative Redeemable Preferred Stock [Member] Class A Cumulative Redeemable Preferred Shares [Member] Payments to Acquire Limited Partnership Interests Payments to acquire limited partnership interests Amortization of Above and Below Market Leases Income Amortization of above and below market leases income. Above-market and below-market leases amortization, net Cover [Abstract] Fixed Lease Income Fixed lease income. Fixed lease income Real Estate Investment Property, Accumulated Depreciation Less: Accumulated depreciation Real Estate Investment Property, Net Total real estate assets, net Amounts Receivable From Curbline Amounts receivable from curbline. Amounts receivable from curbline The entire disclosure surrounding leases. Leases Disclosure [Text Block] Leases Share-Based Payment Arrangement, Noncash Expense Stock-based compensation Share-Based Payment Arrangement, Noncash Expense, Total Additional Paid in Capital Additional paid-in capital Additional Paid in Capital, Total Adjustment to Reconcile Net Income to Cash Provided by (Used in) Operating Activity [Abstract] Adjustments to reconcile net (loss) income to net cash flow (used for) provided by operating activities: Cash and cash equivalents Cash and Cash Equivalent Cash and Cash Equivalents, at Carrying Value, Total Payments of Debt Issuance Costs Payment of debt issuance costs Equity Method Investment, Nonconsolidated Investee [Axis] Curbline [Member] Curbline. Curbline [Member] Cash Provided by (Used in) Financing Activity, Including Discontinued Operation Net cash flow used for financing activities Summary of Amortization Expense Related to the Intangibles Intangible Asset, Finite-Lived, Amortization Expense [Table Text Block] Fair Value, Nonrecurring [Member] Fair Value Measurements Nonrecurring Entity Filer Category Entity Filer Category Income Capitalization Approach Valuation technique income capitalization approach. Valuation Technique Income Capitalization Approach [Member] Increase (Decrease) in Accounts Receivable Net change in accounts receivable Net income after allocation to participating securities Net Income Loss After Allocation to Participating Securities Net income (loss) after allocation to participating securities. Net (loss) income after allocation to participating securities Amortization and Write Off of Debt Issuance Costs, Commitment Fees, and Fair Market Value of Debt Adjustments Amortization and Write Off of Debt Issuance Costs, Commitment Fees, and Fair Market Value of Debt Adjustments Amortization and write-off of debt issuance costs, commitment fees and fair market value of debt adjustments Other Assets Disclosure [Text Block] Other Assets and Intangibles, net Document Information [Line Items] Document Information [Line Items] Entity Address, Postal Zip Code Entity Address, Postal Zip Code Statement of Financial Position [Abstract] Local Phone Number Local Phone Number