Commitments and Contingencies Disclosure [Abstract] Construction costs related to development and expansion Long-term Purchase Commitment, Amount Operating leases, rent expense Operating Leases, Rent Expense, Net Debt Disclosure [Abstract] Schedule of Long-term Debt Instruments [Table] Schedule of Long-term Debt Instruments [Table] Debt Instrument [Axis] Debt Instrument [Axis] Debt Instrument, Name [Domain] Debt Instrument, Name [Domain] Senior Unsecured Notes and Unsecured Term Loans Senior Unsecured Notes and Unsecured Term Loans [Member] Senior Unsecured Notes and Unsecured Term Loans [Member] Variable Rate [Axis] Variable Rate [Axis] Variable Rate [Domain] Variable Rate [Domain] London Interbank Offered Rate (LIBOR) London Interbank Offered Rate (LIBOR) [Member] Range [Axis] Range [Axis] Range [Domain] Range [Domain] Minimum Minimum [Member] Maximum Maximum [Member] Credit Facility [Axis] Credit Facility [Axis] Credit Facility [Domain] Credit Facility [Domain] Revolving Credit Facility Revolving Credit Facility [Member] Long-term Debt, Type [Axis] Long-term Debt, Type [Axis] Long-term Debt, Type [Domain] Long-term Debt, Type [Domain] Unsecured Debt Unsecured Debt [Member] Fixed Rate Mortgages Fixed Rate Mortgage Debt [Member] Fixed Rate Mortgage Debt [Member] Junior Subordinated Debt Junior Subordinated Debt [Member] Debt Instrument [Line Items] Debt Instrument [Line Items] Senior unsecured notes and unsecured term loans Long-term Debt, Gross Mortgage debt interest rate Debt Instrument, Interest Rate, Stated Percentage Mortgages payable Secured Debt Net book value of mortgage on properties Mortgage Loans on Real Estate, Carrying Amount of Mortgages Revolving credit facility, outstanding balance Long-term Line of Credit Increase of revolving credit facility Proceeds from (Repayments of) Lines of Credit Letter of credit, outstanding balance Letters of Credit Outstanding, Amount Letter of credit, remaining borrowing capacity Line of Credit Facility, Remaining Borrowing Capacity Line of credit facility, interest rate Line of Credit Facility, Interest Rate at Period End Basis spread on variable rate Debt Instrument, Basis Spread on Variable Rate Business Combinations [Abstract] Total revenue from 2018 acquisition Business Combination, Pro Forma Information, Revenue of Acquiree since Acquisition Date, Actual Net income from 2018 acquisition Business Combination, Pro Forma Information, Earnings or Loss of Acquiree since Acquisition Date, Actual Earnings Per Share [Abstract] Earnings Per Common Share Earnings Per Share [Text Block] Equity Method Investments and Joint Ventures [Abstract] Summary of Combined Financial Information for Unconsolidated Joint Ventures, Balance Sheets Equity Method Investees Balance Sheet Data [Table Text Block] Equity Method Investees Balance Sheet Data [Table Text Block] Summary of Combined Financial Information for Unconsolidated Entities, Statements of Operations Equity Method Investees Income Statement Data [Table Text Block] Equity Method Investees Income Statement Data [Table Text Block] Information of Fees Earned Schedule Of Management And Other Fee Income [Table Text Block] Schedule Of Management And Other Fee Income [Table Text Block] Real Estate [Abstract] Real Estate Real Estate Disclosure [Text Block] Disclosure of Compensation Related Costs, Share-based Payments [Abstract] Share-based Compensation Plans Disclosure of Compensation Related Costs, Share-based Payments [Text Block] Management fees Management Fees Revenue Leasing fees Leasing Fees Revenue Leasing Fees Revenue Total Fees Revenue Fees Revenue Income Tax Disclosure [Abstract] Tax Credit Carryforward [Table] Tax Credit Carryforward [Table] Income Tax Authority [Axis] Income Tax Authority [Axis] Income Tax Authority [Domain] Income Tax Authority [Domain] Federal and State Income Taxes Federal And State Income Taxes [Member] Federal and State Income Taxes [Member] Tax Credit Carryforward [Line Items] Tax Credit Carryforward [Line Items] Annual distribution of REIT taxable income (as a percent) Minimum Percentage Of Taxable Income Distribution To Shareholders Minimum Percentage of Taxable Income Distribution to Shareholders Federal and state deferred tax asset Deferred Tax Assets, Gross Federal and state deferred tax asset, valuation allowance Deferred Tax Assets, Valuation Allowance Income tax provision (benefit) Income Tax Expense (Benefit) Fair Value Disclosures [Abstract] Fair Value Measurements, Recurring and Nonrecurring [Table] Fair Value Measurements, Recurring and Nonrecurring [Table] Fair Value, Hierarchy [Axis] Fair Value, Hierarchy [Axis] Fair Value Hierarchy [Domain] Fair Value Hierarchy [Domain] Level 2 Fair Value, Inputs, Level 2 [Member] Floating Rate Debt Floating Rate Debt [Member] Floating Rate Debt 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] Long term debt, carrying amount Long-term Debt Long term debt, fair value Long-term Debt, Fair Value Schedule of Antidilutive Securities Excluded from Computation of Earnings Per Share [Table] Schedule of Antidilutive Securities Excluded from Computation of Earnings Per Share [Table] Antidilutive Securities [Axis] Antidilutive Securities [Axis] Antidilutive Securities, Name [Domain] Antidilutive Securities, Name [Domain] Operating Partnership Units Partnership Units [Member] Partnership Units [Member] Series D Preferred Shares Series D Preferred Stock [Member] Performance Share Units Performance Shares [Member] Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items] Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items] Issued (in shares) Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount Converted (in shares) Common Stock, Shares, Issuable Common Stock, Shares, Issuable Statement of Cash Flows [Abstract] OPERATING ACTIVITIES Net Cash Provided by (Used in) Operating Activities [Abstract] Net income Net Income (Loss), Including Portion Attributable to Noncontrolling Interest 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] Depreciation and amortization Depreciation, Depletion and Amortization Amortization of deferred financing fees Amortization of Debt Issuance Costs and Discounts Income tax provision Increase (Decrease) in Income Taxes Earnings from unconsolidated joint ventures Income (Loss) from Equity Method Investments Distributions received from operations of unconsolidated joint ventures Proceeds from Equity Method Investment, Distribution Provision for impairment Asset Impairment Charges Gain on sale of real estate Gain (Loss) on Disposition of Assets for Financial Service Operations Amortization of premium on mortgages, net Amortization of Debt Discount (Premium) Service-based restricted share expense Share-based Compensation Long-term incentive cash and equity compensation expense Long Term Incentive Plan Cash and Equity Compensation Expense (Benefit) Long Term Incentive Plan Cash and Equity Compensation Expense (Benefit) Changes in assets and liabilities: Increase (Decrease) in Operating Capital [Abstract] Accounts receivable, net Increase (Decrease) in Receivables Acquired lease intangibles and other assets, net Increase (Decrease) in Lease Intangibles and Other Assets Increase (Decrease) in Lease Intangibles and Other Assets Accounts payable, acquired lease intangibles and other liabilities Increase (Decrease) in Accounts Payable and Accrued Liabilities Net cash provided by operating activities Net Cash Provided by (Used in) Operating Activities INVESTING ACTIVITIES Net Cash Provided by (Used in) Investing Activities [Abstract] Acquisition of real estate Payments to Acquire Real Estate Development and capital improvements Payments for Capital Improvements Net proceeds from sales of real estate Proceeds from Sale of Real Estate Held-for-investment Net cash used in by investing activities Net Cash Provided by (Used in) Investing Activities FINANCING ACTIVITIES Net Cash Provided by (Used in) Financing Activities [Abstract] Repayments of mortgages and notes payable Repayments Of Mortgages And Notes Payable Repayments of mortgages and notes payable. Proceeds on revolving credit facility Repayments on revolving credit facility Repayments of Lines of Credit Proceeds, net of costs, from issuance of common stock Proceeds from (Repurchase of) Equity Redemption of operating partnership units for cash Payments to Noncontrolling Interests Shares used for employee taxes upon vesting of awards Payments for Repurchase of Redeemable Convertible Preferred Stock Dividends paid to preferred shareholders Payments of Ordinary Dividends, Preferred Stock and Preference Stock Dividends paid to common shareholders and deferred shares Payments of Ordinary Dividends, Common Stock Distributions paid to operating partnership unit holders Distributions Operating Partnership Unit Holders The cash outflow distributed to Operating Partnership unit holders. Net cash provided by financing activities Net Cash Provided by (Used in) Financing Activities Net change in cash, cash equivalents and restricted cash Cash, Cash Equivalents, Restricted Cash and Restricted Cash Equivalents, Period Increase (Decrease), Including Exchange Rate Effect Cash, cash equivalents and restricted cash at beginning of period Cash, Cash Equivalents, Restricted Cash and Restricted Cash Equivalents Cash, cash equivalents and restricted cash at end of period SUPPLEMENTAL DISCLOSURE OF CASH FLOW INFORMATION Supplemental Cash Flow Information [Abstract] Cash paid for interest (net of capitalized interest of $245 and $54 in 2018 and 2017, respectively) Interest Paid, Net Deferred gain recognized in equity Cumulative Effect of New Accounting Principle in Period of Adoption Fair Value Fair Value Disclosures [Text Block] Net income Net income attributable to noncontrolling interest Net Income (Loss) Attributable to Noncontrolling Interest Allocation of income to restricted share awards Income Loss From Continuing Operations Allocable To Non Vested Restricted Shares Income Loss From Continuing Operations Allocable To Non Vested Restricted Shares Income attributable to RPT Income (Loss) from Continuing Operations, Net of Tax, Attributable to Parent Preferred share dividends Preferred Stock Dividends, Income Statement Impact Net income available to common shareholders Net Income (Loss) Available to Common Stockholders, Basic, After Allocation Of Income (Loss) To Restricted Shares Net Income (Loss) Available to Common Stockholders, Basic, After Allocation Of Income (Loss) To Restricted Shares Net income available to common shareholders - Diluted Net Income (Loss) Available to Common Stockholders, Diluted Weighted average shares outstanding, Basic Weighted Average Number of Shares Outstanding, Basic Restricted stock awards using the treasury method (in shares) Incremental Common Shares Attributable to Dilutive Effect of Share-based Payment Arrangements Weighted average shares outstanding, Diluted Weighted Average Number of Shares Outstanding, Diluted Income per common share, Basic (in usd per share) Earnings Per Share, Basic Income per common share, Diluted (in usd per share) Earnings Per Share, Diluted Schedule of Business Acquisitions, by Acquisition [Table] Schedule of Business Acquisitions, by Acquisition [Table] Business Acquisition [Axis] Business Acquisition [Axis] Business Acquisition, Acquiree [Domain] Business Acquisition, Acquiree [Domain] Income Producing Property Acquisitions Income Producing Property Acquisitions [Member] Income Producing Property Acquisitions Business Acquisition [Line Items] Business Acquisition [Line Items] Consolidated revenue Business Acquisition, Pro Forma Revenue Consolidated net income available to common shareholders Business Acquisition, Pro Forma Net Income (Loss) Equity Investments in Unconsolidated Joint Ventures Equity Method Investments and Joint Ventures Disclosure [Text Block] Commitments and Contingencies Commitments and Contingencies Disclosure [Text Block] Derivative Instruments and Hedging Activities Disclosure [Abstract] Derivative Instruments, Gain (Loss) by Hedging Relationship, by Income Statement Location, by Derivative Instrument Risk [Table] Derivative Instruments, Gain (Loss) [Table] Income Statement Location [Axis] Income Statement Location [Axis] Income Statement Location [Domain] Income Statement Location [Domain] Interest Expense Interest Expense [Member] Derivative Instrument [Axis] Derivative Instrument [Axis] Derivative Contract [Domain] Derivative Contract [Domain] Derivative Assets Derivative Financial Instruments, Assets [Member] Derivative Liabilities Derivative Financial Instruments, Liabilities [Member] Reclassification out of Accumulated Other Comprehensive Income [Axis] Reclassification out of Accumulated Other Comprehensive Income [Axis] Reclassification out of Accumulated Other Comprehensive Income [Domain] Reclassification out of Accumulated Other Comprehensive Income [Domain] Reclassification out of Accumulated Other Comprehensive Income Reclassification out of Accumulated Other Comprehensive Income [Member] Equity Components [Axis] Equity Components [Axis] Equity Component [Domain] Equity Component [Domain] Accumulated Net Gain (Loss) from Cash Flow Hedges Including Portion Attributable to Noncontrolling Interest Accumulated Net Gain (Loss) from Cash Flow Hedges Including Portion Attributable to Noncontrolling Interest [Member] Derivative Instruments, Gain (Loss) [Line Items] Derivative Instruments, Gain (Loss) [Line Items] Amount of Gain (Loss) Recognized in OCI on Derivative (Effective Portion) Derivative Instruments, Gain (Loss) Recognized in Other Comprehensive Income (Loss), Effective Portion, Net Amount of Loss Reclassified from Accumulated OCI into Income (Effective Portion) Interest Income (Expense), Nonoperating, Net Statement of Financial Position [Abstract] Statement [Table] Statement [Table] Class of Stock [Axis] Class of Stock [Axis] Class of Stock [Domain] Class of Stock [Domain] Statement [Line Items] Statement [Line Items] Accounts receivable, allowance for doubtful accounts Allowance for Doubtful Accounts Receivable Preferred shares, par (in usd per share) Preferred Stock, Par or Stated Value Per Share Preferred shares, authorized (in shares) Preferred Stock, Shares Authorized Cumulative convertible perpetual preferred shares, issued (in shares) Preferred Stock, Shares Issued Cumulative convertible perpetual preferred shares, outstanding (in shares) Preferred Stock, Shares Outstanding Cumulative convertible perpetual preferred shares, liquidation preference (in usd per share) Preferred Stock, Liquidation Preference Per Share Cumulative convertible perpetual preferred shares, dividend rate Preferred Stock, Dividend Rate, Percentage Common shares of beneficial interest, par (in usd per share) Common Stock, Par or Stated Value Per Share Common shares of beneficial interest, authorized (in shares) Common Stock, Shares Authorized Common shares of beneficial interest, issued (in shares) Common Stock, Shares, Issued Common shares of beneficial interest, outstanding (in shares) Common Stock, Shares, Outstanding Accounting Policies [Abstract] Organization Organization, Policy [Policy Text Block] Organization, Policy [Policy Text Block] Basis of Presentation Consolidation, Policy [Policy Text Block] Recently Adopted and Recent Accounting Pronouncements New Accounting Pronouncements, Policy [Policy Text Block] Restricted Cash Cash and Cash Equivalents, Restricted Cash and Cash Equivalents, Policy [Policy Text Block] Computation of Basic and Diluted Earnings Per Share Schedule of Earnings Per Share, Basic and Diluted [Table Text Block] Schedule of Antidilutive Securities Excluded from Computation of Earnings Per Share Schedule of Antidilutive Securities Excluded from Computation of Earnings Per Share [Table Text Block] Unsecured Revolving Credit Facility Unsecured Revolving Credit Facility [Member] Unsecured Revolving Credit Facility 2018 Long-term Debt, Maturities, Repayments of Principal, Remainder of Fiscal Year 2019 Long-term Debt, Maturities, Repayments of Principal in Year Two 2020 Long-term Debt, Maturities, Repayments of Principal in Year Three 2021 Long-term Debt, Maturities, Repayments of Principal in Year Four 2022 Long-term Debt, Maturities, Repayments of Principal in Year Five Thereafter Long-term Debt, Maturities, Repayments of Principal after Year Five Subtotal debt Unamortized premium Debt Instrument, Unamortized Premium Unamortized deferred financing costs Debt Issuance Costs, Net Total debt Number of extension options Debt Instrument, Number Of Extension Options Debt Instrument, Number Of Extension Options Extension option, period (in months) Debt Instrument, Extension Option, Period Debt Instrument, Extension Option, Period Fair Value, by Balance Sheet Grouping [Table] Fair Value, by Balance Sheet Grouping [Table] Finite-Lived Intangible Assets by Major Class [Axis] Finite-Lived Intangible Assets by Major Class [Axis] Finite-Lived Intangible Assets, Major Class Name [Domain] Finite-Lived Intangible Assets, Major Class Name [Domain] Above Market Leases Above Market Leases [Member] Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] Buildings and improvements Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Buildings and Improvements Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Buildings and Improvements Above market leases Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Intangible Assets, Other than Goodwill Lease origination costs Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Finite-Lived Intangibles, Lease Origination Costs Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Finite-Lived Intangibles, Lease Origination Costs Other liabilities Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Other Liabilities Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Other Liabilities Below market leases Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Below Market Leases Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Below Market Leases Total purchase price allocated Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Net Provision for impairment Land held for development or sale Inventory, Land Held for Development and Sale Constructions in progress Construction in Progress, Gross Number of properties, held-for-sale Number of Real Estate Properties, Held-for-sale Number of Real Estate Properties, Held-for-sale Number of land parcel, held-for-sale Number of Land Parcel, Held-for-sale Number of Land Parcel, Held-for-sale Property Acquisitions and Dispositions Acquisitions And Dispositions Disclosure [Text Block] This element represents the entire disclosure for real estate acquisitions and dispositions during the period. Cash paid for interest, capitalized interest Interest Paid, Capitalized Schedule of Equity Method Investments [Table] Schedule of Equity Method Investments [Table] Investment, Name [Axis] Investment, Name [Axis] Investment, Name [Domain] Investment, Name [Domain] Joint Venture One Joint Venture One [Member] Joint Venture One [Member] Joint Venture Two Joint Venture Two [Member] Joint Venture Two [Member] Joint Venture Three Joint Venture Three [Member] Joint Venture Three [Member] Joint Venture Four Joint Venture Four [Member] Joint Venture Four [Member] Schedule of Equity Method Investments [Line Items] Schedule of Equity Method Investments [Line Items] Number of joint ventures Number Of Joint Ventures Number of Joint Ventures Ownership interest Equity Method Investment, Ownership Percentage Carrying value of equity investments Payments to Acquire Equity Method Investments Subsequent Events [Abstract] Subsequent Events Subsequent Events [Text Block] Senior unsecured notes Unsecured Debt Unsecured term loan facilities Other Long-term Debt Fixed rate mortgages Unsecured revolving credit facility Junior subordinated notes Junior Subordinated Notes Capital lease obligation Capital Lease Obligations Cash and Cash Equivalents Schedule of Cash and Cash Equivalents [Table Text Block] Restricted Cash Restrictions on Cash and Cash Equivalents [Table Text Block] Debt Debt Disclosure [Text Block] ASSETS Equity Method Investment, Summarized Financial Information, Assets [Abstract] Investment in real estate, net Equity Method Investment Summarized Financial Information Real Estate Net Equity Method Investment, Summarized Financial Information, Real Estate, Net Other assets Equity Method Investment, Summarized Financial Information, Cash, Accounts Receivable, and Other Assets Equity Method Investment, Summarized Financial Information, Cash, Accounts Receivable, and Other Assets Total Assets Equity Method Investment, Summarized Financial Information, Assets LIABILITIES AND OWNERS' EQUITY Equity Method Investment, Summarized Financial Information, Liabilities and Equity [Abstract] Mortgage notes payable Equity Method Investment Summarized Financial Information Liabilities Mortgage Notes Payable Equity Method Investment Summarized Financial Information Liabilities, Mortgage Notes Payable Other liabilities Equity Method Investment Summarized Financial Information Liabilities Other Liabilities Equity Method Investment Summarized Financial Information Liabilities Other Liabilities Owners' equity Equity Method Investment, Summarized Financial Information, Equity Excluding Noncontrolling Interests Total Liabilities and Owners' Equity Equity Method Investment, Summarized Financial Information, Liabilities and Equity RPT's equity investments in unconsolidated joint ventures Equity Method Investments Schedule of Error Corrections and Prior Period Adjustment Restatement [Table] Schedule of Error Corrections and Prior Period Adjustment Restatement [Table] Products and Services [Axis] Products and Services [Axis] Products and Services [Domain] Products and Services [Domain] Other Property Income and Management and Other Fee Income Other Property Income and Management and Other Fee Income [Member] Other Property Income and Management and Other Fee Income [Member] Retained Earnings Retained Earnings [Member] Adjustments for New Accounting Pronouncements [Axis] Adjustments for New Accounting Pronouncements [Axis] Type of Adoption [Domain] Type of Adoption [Domain] Accounting Standards Update 2017-05 Accounting Standards Update 2017-05 [Member] Accounting Standards Update 2017-05 [Member] Accounting Standards Update 2016-18 Accounting Standards Update 2016-18 [Member] Real Estate Property Ownership [Axis] Real Estate Property Ownership [Axis] Real Estate Properties [Domain] Real Estate Properties [Domain] Shopping Centers Shopping Centers [Member] Shopping Centers Error Corrections and Prior Period Adjustments Restatement [Line Items] Error Corrections and Prior Period Adjustments Restatement [Line Items] Number of real estate properties owned and managed Number of Real Estate Properties Area of real estate property (in sq feet) Area Occupied Area Occupied Number of joint ventures for which fees are earned Number Of Joint Ventures For Which Fees Earned Number Of Joint Ventures For Which Fees Earned Ownership interest in Ramco-Gershenson Properties, L. P. Subsidiary of Limited Liability Company or Limited Partnership, Ownership Interest Cumulative effect adjustment - ASU adoption Revenue Revenue from Contract with Customer, Excluding Assessed Tax Percentage of revenue Percentage of Revenue Percentage of Revenue Proceeds from dispositions held in escrow (non-cash investing activity) Escrow Deposits Related to Property Sales Income Statement [Abstract] REVENUE Real Estate Revenue, Net [Abstract] Minimum rent Operating Leases, Income Statement, Minimum Lease Revenue Percentage rent Operating Leases, Income Statement, Percentage Revenue Recovery income from tenants Tenant Reimbursements Other property income Other Real Estate Revenue Management and other fee income Management And Other Fee Income Revenue, as contractually stipulated, for managing and operating joint ventures and third-party properties during the reporting period. TOTAL REVENUE Real Estate Revenue, Net EXPENSES Costs and Expenses [Abstract] Real estate taxes Real Estate Tax Expense Recoverable operating expense Direct Costs of Leased and Rented Property or Equipment Non-recoverable operating expense Other Cost and Expense, Operating Depreciation and amortization Depreciation, Depletion and Amortization, Nonproduction General and administrative expense General and Administrative Expense TOTAL EXPENSES Costs and Expenses OPERATING INCOME Operating Income (Loss) OTHER INCOME AND EXPENSES Nonoperating Income (Expense) [Abstract] Other (expense) income, net Other Nonoperating Income (Expense) Gain on sale of real estate Gains (Losses) on Sales of Investment Real Estate Earnings from unconsolidated joint ventures Interest expense Interest Expense INCOME BEFORE TAX Income (Loss) from Continuing Operations before Income Taxes, Noncontrolling Interest Income tax provision NET INCOME Net income attributable to noncontrolling partner interest NET INCOME ATTRIBUTABLE TO RPT Net Income (Loss) Attributable to Parent NET INCOME AVAILABLE TO COMMON SHAREHOLDERS Net Income (Loss) Available to Common Stockholders, Basic EARNINGS PER COMMON SHARE Earnings Per Share, Basic [Abstract] Basic (in usd per share) Diluted (in usd per share) WEIGHTED AVERAGE COMMON SHARES OUTSTANDING Weighted Average Number of Shares Outstanding, Diluted [Abstract] Basic (in shares) Diluted (in shares) Cash Dividend Declared per Common Share (in usd per share) Common Stock, Dividends, Per Share, Declared OTHER COMPREHENSIVE INCOME Comprehensive Income (Loss), Net of Tax, Including Portion Attributable to Noncontrolling Interest [Abstract] Other comprehensive gain (loss): Other Comprehensive Income (Loss), Net of Tax [Abstract] Gain (loss) on interest rate swaps Other Comprehensive Income (Loss), Unrealized Gain (Loss) on Derivatives Arising During Period, Net of Tax Comprehensive income Comprehensive Income (Loss), Net of Tax, Including Portion Attributable to Noncontrolling Interest Comprehensive income attributable to noncontrolling interest Comprehensive Income (Loss), Net of Tax, Attributable to Noncontrolling Interest COMPREHENSIVE INCOME ATTRIBUTABLE TO RPT Comprehensive Income (Loss), Net of Tax, Attributable to Parent Recorded Amount of Assets and Liabilities Measured at Fair Value on Recurring Basis Fair Value, Liabilities Measured on Recurring and Nonrecurring Basis [Table Text Block] Total revenue Equity Method Investment, Summarized Financial Information, Revenue Total expenses Equity Method Investment Summarized Financial Information Operating Expenses Equity Method Investment, Summarized Financial Information, Operating Expenses Net income Equity Method Investment, Summarized Financial Information, Net Income (Loss) RPT's share of earnings from unconsolidated joint ventures Income Loss From Equity Method Investment Income Loss From Equity Method Investment Statement of Stockholders' Equity [Abstract] Preferred Shares Preferred Stock [Member] Common Shares Common Stock [Member] Additional Paid-in Capital Additional Paid-in Capital [Member] Accumulated Distributions in Excess of Net Income Accumulated Distributions in Excess of Net Income [Member] Accumulated Other Comprehensive Income AOCI Attributable to Parent [Member] Noncontrolling Interest Noncontrolling Interest [Member] Increase (Decrease) in Stockholders' Equity [Roll Forward] Increase (Decrease) in Stockholders' Equity [Roll Forward] Beginning balance Stockholders' Equity, Including Portion Attributable to Noncontrolling Interest Adoption of ASU 2017-05 Redemption of OP unit holders Noncontrolling Interest, Decrease from Redemptions or Purchase of Interests Share-based compensation and other expense, net of shares withheld for employee taxes Adjustments to Additional Paid in Capital, Share-based Compensation, Requisite Service Period Recognition Dividends declared to common shareholders Dividends, Common Stock, Cash Dividends declared to preferred shareholders Dividends, Preferred Stock, Cash Distributions declared to noncontrolling interests Noncontrolling Interest, Decrease from Distributions to Noncontrolling Interest Holders Dividends declared to deferred shares Restricted Share Units Unvested Dividends Paid This element represents dividends paid during the period pertaining to unvested restricted shares that were previously awarded under a share-based compensation plan. Other comprehensive income adjustment Ending balance Balance Sheet Location [Axis] Balance Sheet Location [Axis] Balance Sheet Location [Domain] Balance Sheet Location [Domain] Other assets Other Assets [Member] Other liabilities Other Liabilities [Member] Fair Value, Assets and Liabilities Measured on Recurring Basis [Abstract] Fair Value, Assets, Liabilities and Stockholders' Equity Measured on Recurring Basis [Abstract] Derivative assets - interest rate swaps Interest Rate Derivative Assets, at Fair Value Derivative liabilities - interest rate swaps Interest Rate Derivative Liabilities, at Fair Value Leasehold Interest (West Oaks) Providence Marketplace [Member] Providence Marketplace [Member] Real Estate, Type of Property [Axis] Real Estate, Type of Property [Axis] Real Estate [Domain] Real Estate [Domain] Income Producing Property and Land and Outparcel Acquisition Income Producing Property and Land and Outparcel Acquisition [Member] Income Producing Property and Land and Outparcel Acquisition [Member] Location Real Estate Property Location Real Estate Property, Location GLA (in sq ft) Area of Real Estate Property Acreage (in acres) Area of Land Date Acquired Business Acquisition, Effective Date of Acquisition Purchase Price Payments to Acquire Businesses, Gross Assumed Debt Business Combination, Consideration Transferred, Liabilities Incurred Cash and cash equivalents Cash and Cash Equivalents, at Carrying Value Restricted cash and escrows Restricted Cash and Cash Equivalents Cash, cash equivalents, and restricted cash Summary of Mortgages, Notes Payable and Capital Lease Obligation Schedule of Long-term Debt Instruments [Table Text Block] Scheduled Principal Payments on Mortgages and Notes Payable Schedule of Maturities of Long-term Debt [Table Text Block] Schedule of Share-based Compensation Arrangements by Share-based Payment Award [Table] Schedule of Share-based Compensation Arrangements by Share-based Payment Award [Table] Title of Individual [Axis] Title of Individual [Axis] Relationship to Entity [Domain] Relationship to Entity [Domain] Employee Employee [Member] Employee [Member] Trustee Trustee [Member] Trustee [Member] Award Type [Axis] Award Type [Axis] Equity Award [Domain] Equity Award [Domain] Long-Term Incentive Plan ("LTIP") Long Term Incentive Plans [Member] Long Term Incentive Plans Service-based restricted stock Service Based Awards [Member] Service Based Awards [Member] Restricted stock Restricted Stock [Member] Equity Award Stock Compensation Plan [Member] Share-based Compensation Arrangement by Share-based Payment Award [Line Items] Share-based Compensation Arrangement by Share-based Payment Award [Line Items] Number of share-based compensation plans in effect Share-based Compensation Arrangement by Share-based Payment Award, Number of Plans Share-based Compensation Arrangement by Share-based Payment Award, Number of Plans Number of shares authorized for grant Share-based Compensation Arrangement by Share-based Payment Award, Number of Shares Authorized Number of shares available for issuance Share-based Compensation Arrangement by Share-based Payment Award, Number of Shares Available for Grant Number of shares terminated Share-based Compensation Arrangement by Share-based Payment Award, Options, Forfeitures in Period Service based restricted stock, shares granted Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period Performance-based liability awards, measurement period (in years) Share Based Compensation Arrangement By Share Based Payment Award Performance Period Share Based Compensation Arrangement by Share Based Payment Award, Performance Period Service based restricted stock, vesting period (in years) Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Period Share-based compensation expenses Allocated Share-based Compensation Expense Compensation expense (benefit) related to cash awards Compensation Expense (Benefit) Related To Cash Based Award Grant Compensation Expense (Benefit) Related To Cash Based Award Grant Total unrecognized compensation expense Employee Service Share-based Compensation, Nonvested Awards, Compensation Cost Not yet Recognized Total unrecognized compensation expense, weighted average period of recognition Employee Service Share-based Compensation, Nonvested Awards, Compensation Cost Not yet Recognized, Period for Recognition Organization and Basis of Presentations Organization, Consolidation and Presentation of Financial Statements Disclosure [Text Block] Summary of Notional Values and Fair Values of Derivative Financial Instruments Summary Of Hedged Financial Instruments Disclosure [Table Text Block] Summary Of Hedged Financial Instruments Disclosure [Table Text Block] Summary of Effect of Derivative Financial Instruments on Condensed Consolidated Statements of Operations Derivative Instruments, Gain (Loss) [Table Text Block] Taxes Income Tax Disclosure [Text Block] Derivative [Table] Derivative [Table] Hedging Relationship [Axis] Hedging Relationship [Axis] Hedging Relationship [Domain] Hedging Relationship [Domain] Cash Flow Hedging Cash Flow Hedging [Member] Hedging Designation [Axis] Hedging Designation [Axis] Hedging Designation [Domain] Hedging Designation [Domain] Designated as Hedging Instrument Designated as Hedging Instrument [Member] Unsecured term loan facility with: 1.850 % Swap Rate, Expiration Date 10/2018 Interest Rate Contract Three [Member] Interest Rate Contract Three Unsecured term loan facility with: 1.840 % Swap Rate, Expiration Date 10/2018 Interest Rate Contract Four [Member] Interest Rate Contract Four Unsecured term loan facility with: 2.150 % Swap Rate, Expiration Date 05/2020 Interest Rate Contract Six [Member] Interest Rate Contract Six [Member] Unsecured term loan facility with: 2.150 % Swap Rate, Expiration Date 05/2020 Interest Rate Contract Seven [Member] Interest Rate Contract Seven [Member] Unsecured term loan facility with: 1.460 % Swap Rate, Expiration Date 05/2020 Interest Rate Contract One [Member] Interest Rate Contract One Unsecured term loan facility with: 1.498 % Swap Rate, Expiration Date 05/2021 Interest Rate Contract Nine [Member] Interest Rate Contract Nine [Member] Unsecured term loan facility with: 1.490 % Swap Rate, Expiration Date 05/2021 Interest Rate Contract Eight [Member] Interest Rate Contract Eight [Member] Unsecured term loan facility with: 1.480 % Swap Rate, Expiration Date 05/2021 Interest Rate Contract Five [Member] Interest Rate Contract Five [Member] Interest Rate Swap Interest Rate Swap [Member] Unsecured term loan facility with: 1.770 % Swap Rate, Expiration Date 03/2023 Interest Rate Swap Contract Twelve [Member] Interest Rate Swap Contract Twelve [Member] Unsecured term loan facility with: 2.048 % Swap Rate, Expiration Date 10/2018 Interest Rate Contract Two [Member] Interest Rate Contract Two Derivative [Line Items] Derivative [Line Items] Derivative asset, notional amount Derivative Asset, Notional Amount Derivative liability, notional amount Derivative Liability, Notional Amount Fixed rate (as a percent) Derivative, Fixed Interest Rate Derivative assets, at fair value Derivative liability, at fair value ASSETS Assets [Abstract] Income producing properties, at cost: Real Estate Investment Property, at Cost [Abstract] Land Land Buildings and improvements Investment Building and Building Improvements Less accumulated depreciation and amortization Real Estate Investment Property, Accumulated Depreciation Income producing properties, net Real Estate Rental Property Net Represents a total which includes the following: (1) land; (2) investments in building and building improvements; (3) equipment; less the accumulated depreciation associated with (1) through (3). Construction in progress and land available for development or sale Land Held For Development Or Sale And Construction In Progress Carrying amount of land available for development or available for sale and long-lived assets under construction. Net real estate Real Estate Investment Property, Net Equity investments in unconsolidated joint ventures Accounts receivable (net of allowance for doubtful accounts of $1,376 and $1,374 as of March 31, 2018 and December 31, 2017, respectively) Accounts Receivable, Net Acquired lease intangibles, net Finite-Lived Intangible Assets, Net Other assets, net Other Assets TOTAL ASSETS Assets LIABILITIES AND SHAREHOLDERS' EQUITY Liabilities and Equity [Abstract] Notes payable, net Notes Payable Capital lease obligation Accounts payable and accrued expenses Accounts Payable and Accrued Liabilities Acquired lease intangibles, net Off-market Lease, Unfavorable Other liabilities Other Liabilities Distributions payable Dividends Payable TOTAL LIABILITIES Liabilities Commitments and Contingencies Commitments and Contingencies Ramco-Gershenson Properties Trust (RPT) Shareholders' Equity: Stockholders' Equity, Including Portion Attributable to Noncontrolling Interest [Abstract] Preferred shares, $0.01 par, 2,000 shares authorized: 7.25% Series D Cumulative Convertible Perpetual Preferred Shares, (stated at liquidation preference $50 per share), 1,849 shares issued and outstanding as of March 31, 2018 and December 31, 2017, respectively Preferred Stock, Value, Issued Common shares of beneficial interest, $0.01 par, 120,000 shares authorized, 79,475 and 79,366 shares issued and outstanding as of March 31, 2018 and December 31, 2017, respectively Common Stock, Value, Issued Additional paid-in capital Additional Paid in Capital Accumulated distributions in excess of net income Accumulated Distributions in Excess of Net Income Accumulated other comprehensive income Accumulated Other Comprehensive Income (Loss), Net of Tax TOTAL SHAREHOLDERS' EQUITY ATTRIBUTABLE TO RPT Stockholders' Equity Attributable to Parent Noncontrolling interest Stockholders' Equity Attributable to Noncontrolling Interest TOTAL SHAREHOLDERS' EQUITY TOTAL LIABILITIES AND SHAREHOLDERS' EQUITY Liabilities and Equity Derivative Financial Instruments Derivative Instruments and Hedging Activities Disclosure [Text Block] Schedule of Acquisitions Schedule of Business Acquisitions, by Acquisition [Table Text Block] Summary of Total Aggregate Fair Value of Acquisitions Allocated Schedule of Recognized Identified Assets Acquired and Liabilities Assumed [Table Text Block] Pro Forma Information Business Acquisition, Pro Forma Information [Table Text Block] Document and Entity Information [Abstract] Document and Entity Information [Abstract] Entity Registrant Name Entity Registrant Name Entity Central Index Key Entity Central Index Key Current Fiscal Year End Date Current Fiscal Year End Date Entity Filer Category Entity Filer Category Document Type Document Type Amendment Flag Amendment Flag Document Period End Date Document Period End Date Document Fiscal Year Focus Document Fiscal Year Focus Document Fiscal Period Focus Document Fiscal Period Focus Trading Symbol Trading Symbol Entity Common Stock, Shares Outstanding Entity Common Stock, Shares Outstanding