Debt Disclosure [Abstract] Secured and Unsecured Debt [Table] Participating Mortgage Loans [Table] Credit Facility [Axis] Credit Facility [Axis] Credit Facility [Domain] Credit Facility [Domain] Debt Instrument [Axis] Debt Instrument [Axis] Debt Instrument, Name [Domain] Debt Instrument, Name [Domain] Unsecured bank credit facilities Notes Payable to Banks [Member] Unsecured Debt [Member] Unsecured Debt [Member] Secured Debt [Member] Secured Debt [Member] Long-term Debt, Type [Axis] Long-term Debt, Type [Axis] Long-term Debt, Type [Domain] Long-term Debt, Type [Domain] Secured and unsecured debt [Member] Secured and unsecured debt [Member] Secured and unsecured debt [Member] Secured and Unsecured Debt [Line Items] Secured and Unsecured Debt [Line Items] Secured and Unsecured Debt [Line Items] Proceeds from unsecured bank credit facilities Proceeds from Bank Debt Repayments of Bank Debt Repayments of Bank Debt Loans Payable, Noncurrent [Abstract] Loans Payable, Noncurrent [Abstract] Secured debt, carrying amount Secured debt, carrying amount Secured debt, carrying amount Unsecured debt, carrying amount Unsecured debt, carrying amount Unsecured debt, carrying amount Unsecured bank credit facilities - variable rate, carrying amount Unsecured bank credit facilities - variable rate, carrying amount Unsecured bank credit facilities - variable rate, carrying amount Unsecured bank credit facilities - fixed rate, carrying amount Unsecured bank credit facilities - fixed rate, carrying amount Unsecured bank credit facilities - fixed rate, carrying amount Unamortized debt issuance costs Unamortized debt issuance costs Unamortized debt issuance costs Secured Debt Secured Debt Unsecured Debt Unsecured Debt Unsecured bank credit facilities Notes Payable to Bank Total debt Total debt Total debt Long-term Debt, Maturities, Repayments of Principal in Remainder of Fiscal Year Long-term Debt, Maturities, Repayments of Principal, Remainder of Fiscal Year Payments of principal over future years [Abstract] Long-term Debt, Fiscal Year Maturity [Abstract] 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 2023 and beyond Long-term Debt, Maturities, Repayments of Principal after Year Five Long-term debt, maturities, secured debt and unsecured debt Long-term debt, maturities, secured debt and unsecured debt Long-term debt, maturities, secured debt and unsecured debt Risks and Uncertainties [Abstract] Risks and Uncertainties Concentration Risk Disclosure [Text Block] Disclosure of Compensation Related Costs, Share-based Payments [Abstract] Summary of total shares granted, forfeited and delivered Schedule of Share-based Compensation, Activity [Table Text Block] 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 Well-known Seasoned Issuer Entity Well-known Seasoned Issuer Entity Voluntary Filers Entity Voluntary Filers Entity Current Reporting Status Entity Current Reporting Status Entity Filer Category Entity Filer Category Entity Public Float Entity Public Float Entity Common Stock, Shares Outstanding Entity Common Stock, Shares Outstanding Document Fiscal Year Focus Document Fiscal Year Focus Document Fiscal Period Focus Document Fiscal Period Focus Document Type Document Type Amendment Flag Amendment Flag Document Period End Date Document Period End Date Accounting Changes and Error Corrections [Abstract] New Accounting Pronouncements or Change in Accounting Principle [Table] New Accounting Pronouncements or Change in Accounting Principle [Table] Adjustments for New Accounting Pronouncements [Axis] Adjustments for New Accounting Pronouncements [Axis] Type of Adoption [Domain] Type of Adoption [Domain] Adjustments for Change in Accounting Principle [Axis] Adjustments for Change in Accounting Principle [Axis] Adjustments for Change in Accounting Principle [Domain] Adjustments for Change in Accounting Principle [Domain] Scenario [Axis] Scenario [Axis] Scenario, Unspecified [Domain] Scenario, Unspecified [Domain] New Accounting Pronouncements or Change in Accounting Principle [Line Items] New Accounting Pronouncements or Change in Accounting Principle [Line Items] Statement of Stockholders' Equity [Abstract] Statement [Table] Equity Components [Axis] Shareholders' Equity [Domain] Equity Component [Domain] Common Stock Common Stock [Member] Additional Paid-in Capital Additional Paid-in Capital [Member] Distributions In Excess Of Earnings Accumulated Distributions in Excess of Net Income [Member] Accumulated Other Comprehensive Income AOCI Attributable to Parent [Member] Noncontrolling Interest in Joint Ventures Noncontrolling Interest [Member] Statement [Line Items] Statement [Line Items] Increase (Decrease) in Stockholders' Equity [Roll Forward] Increase (Decrease) in Stockholders' Equity [Roll Forward] BALANCE Stockholders' Equity, Including Portion Attributable to Noncontrolling Interest Net income Net Income (Loss), Including Portion Attributable to Noncontrolling Interest Net unrealized change in fair value of cash flow hedges Other Comprehensive Income (Loss), Unrealized Gain (Loss) on Derivatives Arising During Period, Net of Tax Common dividends declared - $.64 per share Dividends, Common Stock, Cash Stock-based compensation, net of forfeitures Allocated Share-based Compensation Expense Issuance of 179,501 shares of common stock, common stock offering, net of expenses Stock Issued During Period, Value, New Issues Issuance of 667 shares of common stock, dividend reinvestment plan Stock Issued During Period, Value, Dividend Reinvestment Plan Withheld 23,824 shares of common stock to satisfy tax withholding obligations in connection with the vesting of restricted stock Withheld Shares Of Common Stock To Satisfy Tax Withholding Obligations In Connection With Vesting Of Restricted Stock Value of withheld restricted stock to satisfy withholding for vesting of restricted stock. Distributions to noncontrolling interest Noncontrolling Interest, Decrease from Distributions to Noncontrolling Interest Holders BALANCE Statement of Financial Position [Abstract] Common shares, par value (in dollars per share) Common Stock, Par or Stated Value Per Share Common shares, authorized Common Stock, Shares Authorized Common shares, issued Common Stock, Shares, Issued Common shares, outstanding Common Stock, Shares, Outstanding Excess shares, par value (in dollars per share) Excess shares, par value Face amount or stated value of excess shares per share; generally not indicative of the fair market value per share. Excess shares, authorized Excess shares, authorized The maximum number of excess shares permitted to be issued by an entity's charter and bylaws. Excess shares, issued Excess shares, issued The number of excess shares sold or granted to shareholders. Accounting Policies [Abstract] Use of Estimates USE OF ESTIMATES [Text Block] The entire disclosure for use of estimates. Entity's explanation that the preparation of financial statements in conformity with generally accepted accounting principles requires the use of management estimates. DERIVATIVE INSTRUMENTS AND HEDGING ACTIVITIES [Abstract] DERIVATIVE INSTRUMENTS AND HEDGING ACTIVITIES [Abstract] Derivative Instruments and Hedging Activities Disclosure [Text Block] Derivative Instruments and Hedging Activities Disclosure [Text Block] Fair Value Disclosures [Abstract] Fair Value of Financial Instruments Fair Value, Measurement Inputs, Disclosure [Text Block] Stockholders' Equity Attributable to Parent Stockholders' Equity Attributable to Parent [Abstract] Common dividends declared - per share (in dollars per share) Common Stock, Dividends, Per Share, Declared Issuance of shares of common stock, common stock offering, net of expenses Stock Issued During Period, Shares, New Issues Issuance of shares of common stock, dividend reinvestment plan Stock Issued During Period, Shares, Dividend Reinvestment Plan Withheld shares of common stock to satisfy tax withholding obligations in connection with the vesting of restricted stock Withheld Shares Of Common Stock To Satisfy Tax Withholding Obligations In Connection With Vesting Of Restricted Stock Shares Number of withheld restricted stock shares to satisfy withholding for vesting of restricted stock. Business Combinations [Abstract] Schedule of Property Acquisitions, by Acquisition [Table] Schedule of Business Acquisitions, by Acquisition [Table] Balance Sheet Location [Axis] Balance Sheet Location [Axis] Balance Sheet Location [Domain] Balance Sheet Location [Domain] Real Estate Properties [Domain] Real Estate Properties [Domain] Industrial Development [Member] Industrial Development [Member] Industrial Development Property Acquisition [Axis] Business Acquisition [Axis] Property Acquisition, Acquiree [Domain] Business Acquisition, Acquiree [Domain] 2017 Acquisitions (Shiloh 400, Broadmoor, Hurricane Shoals 1 & 2, Southpark 5-7) [Member] 2017 Acquisitions (Shiloh 400, Broadmoor, Hurricane Shoals 1 & 2, Southark 5-7) [Member] 2017 Acquisitions (Shiloh 400, Broadmoor, Hurricane Shoals 1 & 2, Southark 5-7) [Member] Acquired 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] Leases, Acquired-in-Place [Member] Leases, Acquired-in-Place [Member] Above Market Leases [Member] Above Market Leases [Member] Below market lease [Member] Below market lease [Member] Below market lease intangible [Member] Property Acquisition [Line Items] Business Acquisition [Line Items] Amortization expense for lease intangibles Amortization of Intangible Assets Above and below market leases Increase (decrease) rental Income Rental Income Increase Decrease For Amortization Of Acquired In Place Lease Intangibles Aggregate amount of intangible asset amortization recognized as an adjustment to rental income during the period. Total cost of properties purchased Payments to Acquire Businesses, Gross Amount of total cost allocated to real estate properties Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Property, Plant, and Equipment Property acquisition, value allocated to Development Property acquisition, value allocated to Development Property acquisition, value allocated to Development Amount of total cost allocated to land Business Combination Recognized Assets Acquired Land The amount of land recognized as of the acquisition date. Intangible acquired associated with purchase of Real Estate Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Finite-Lived Intangibles Acquisition-related costs expensed Business Combination, Acquisition Related Costs Discontinued Operations and Disposal Groups [Abstract] Real Estate Sold and Held For Sale and Discontinued Operations Disposal Groups, Including Discontinued Operations, Disclosure [Text Block] Income Statement [Abstract] Statement [Table] REVENUES Revenues [Abstract] Income from real estate operations Real Estate Revenue, Net Other revenue Other Operating Income Revenues Revenues EXPENSES Cost of Revenue [Abstract] Expenses from real estate operations Cost of Real Estate Revenue Depreciation and amortization Depreciation, Depletion and Amortization General and administrative General and Administrative Expense Expenses Costs and Expenses OPERATING INCOME Operating Income (Loss) OTHER INCOME (EXPENSE) Operating Expenses [Abstract] Interest expense Interest Expense Gain on Sales of Real Estate Investments Gains (Losses) on Sales of Investment Real Estate Other Other Operating Income (Expense), Net Net Income Net income attributable to noncontrolling interest in joint ventures Net Income (Loss) Attributable to Noncontrolling Interest NET INCOME ATTRIBUTABLE TO EASTGROUP PROPERTIES, INC. COMMON STOCKHOLDERS Net Income (Loss) Available to Common Stockholders, Basic Other comprehensive income - cash flow hedges Other Comprehensive Income (Loss), Net of Tax TOTAL COMPREHENSIVE INCOME Comprehensive Income (Loss), Net of Tax, Attributable to Parent BASIC PER COMMON SHARE DATA FOR NET INCOME ATTRIBUTABLE TO EASTGROUP PROPERTIES, INC. COMMON STOCKHOLDERS Earnings Per Share, Basic [Abstract] Net income attributable to common stockholders Earnings Per Share, Basic Weighted average shares outstanding Weighted Average Number of Shares Outstanding, Basic DILUTED PER COMMON SHARE DATA FOR NET INCOME ATTRIBUTABLE TO EASTGROUP PROPERTIES, INC. COMMON STOCKHOLDERS [Abstract] Earnings Per Share, Diluted [Abstract] Net income attributable to common stockholders Earnings Per Share, Diluted Weighted average shares outstanding Weighted Average Number of Shares Outstanding, Diluted AMOUNTS ATTRIBUTABLE TO EASTGROUP PROPERTIES, INC. COMMON STOCKHOLDERS Income Amounts Attributable to Parent, Disclosures [Abstract] Net income attributable to common stockholders Organization, Consolidation and Presentation of Financial Statements [Abstract] Basis of Presentation Basis of Accounting [Text Block] Other Assets [Abstract] Other Assets Other Assets Disclosure [Text Block] Subsidiaries [Table] Investment, Name [Axis] Investment, Name [Axis] Equity Method Investee, Name [Domain] Investment, Name [Domain] Industry Distribution Center II - undivided tenant [Member] Industry Distribution Center II - undivided tenant [Member] Industry Distribution Center II is a real estate property in which the Company has a 50% undivided tenant-in-common interest. Legal Entity [Axis] Legal Entity [Axis] Entity [Domain] Entity [Domain] University Business Center [Member] University Business Center [Member] University Business Center University Business Center 120 and 130 [Member] University Business Center 120 and 130 [Member] University Business Center 120 and 130 [Member] Castilian Research Center [Member] Castilian Research Center [Member] A corporation owned and operated by a small group of ventures to accomplish a mutually beneficial venture or project. Subsidiaries [Line Items] Noncontrolling interest, ownership percentage acquired during period Noncontrolling interest, ownership percentage acquired during period Noncontrolling interest, ownership percentage acquired during period Joint Ventures Joint Ventures Joint Ventures Joint venture ownership interest Less Than Wholly Owned Joint Venture Investment Ownership Percentage The percentage of ownership of common stock or equity participation in consolidated joint venture investee. Joint ventures' assets, liabilities, revenues and expenses with noncontrolling interests Joint Ventures Assets Liabilities Revenues And Expenses With Noncontrolling Interests Records percentage of the joint ventures' assets, liabilities, revenues and expenses with non-controlling interests provided for in accordance with the joint venture agreement. Tenant-in-common interest Equity Method Investment, Ownership Percentage Principles of Consolidation Consolidation, Subsidiaries or Other Investments, Consolidated Entities, Policy [Policy Text Block] Real Estate Property Acquisitions and Acquired Intangibles Business Combination Disclosure [Text Block] ASSETS Assets [Abstract] Real estate properties Real estate properties Carrying amount as of the balance sheet date of real estate held for productive use, investments in building and building improvements, tenant and other improvements . This excludes land held for sale. Development Development in Process Real estate and development properties Real Estate Investment Property, at Cost Less accumulated depreciation Real Estate Investment Property, Accumulated Depreciation Real estate, net Real Estate Investment Property, Net Unconsolidated investment Equity Method Investments Cash Cash Other Assets Other Assets TOTAL ASSETS Assets LIABILITIES AND EQUITY Liabilities and Equity [Abstract] LIABILITIES Liabilities [Abstract] Unsecured bank credit facilities Unsecured debt Secured debt Accounts payable and accrued expenses Accounts Payable and Accrued Liabilities Other liabilities Other Liabilities Total Liabilities Liabilities EQUITY Stockholders' Equity, Including Portion Attributable to Noncontrolling Interest [Abstract] Stockholders' Equity: Common shares; $.0001 par value; 70,000,000 shares authorized; 34,944,419 shares issued and outstanding at March 31, 2018 and 34,758,167 at December 31, 2017 Common Stock, Value, Issued Excess shares; $.0001 par value; 30,000,000 shares authorized; no shares issued Excess shares value Dollar value of issued excess shares. Additional paid-in capital on common shares Additional Paid in Capital, Common Stock Distributions in excess of earnings Accumulated Distributions in Excess of Net Income Accumulated Other Comprehensive Income Accumulated Other Comprehensive Income (Loss), Net of Tax Total Stockholders' Equity Stockholders' Equity Attributable to Parent Noncontrolling interest in joint ventures Stockholders' Equity Attributable to Noncontrolling Interest Total Equity TOTAL LIABILITIES AND EQUITY Liabilities and Equity Earnings Per Share [Abstract] Earnings Per Share Schedule of Earnings Per Share, Basic and Diluted [Table Text Block] Schedule of Share-based Compensation Arrangements by Share-based Payment Award [Table] Numbers of years in total shareholder return performance period [Axis] Numbers of years in total shareholder return performance period [Axis] Numbers of years in total shareholder return performance period [Axis] Numbers of years in total shareholder return performance period [Domain] Numbers of years in total shareholder return performance period [Domain] [Domain] for Numbers of years in total shareholder return performance period [Axis] One year period [Member] One year period [Member] One year period [Member] Two year period [Member] Two year period [Member] Two year period [Member] Three year period [Member] Three year period [Member] Three year period [Member] Award Type [Axis] Award Type [Axis] Equity Award [Domain] Equity Award [Domain] Subsequent Event Type [Axis] Subsequent Event Type [Axis] Subsequent Event Type [Domain] Subsequent Event Type [Domain] Award Recipient Type [Axis] Award Recipient Type [Axis] Award Recipient Type [Axis] Award Recipient Type [Domain] Award Recipient Type [Domain] [Domain] for Award Recipient Type [Axis] Award Recipient Type Employee [Member] Award Recipient Type Employee [Member] Award Recipient Type Employee [Member] Award Recipient Type Employees and Directors [Member] Award Recipient Type Employees and Directors [Member] Award Recipient Type Employees and Directors Award Recipient Type Director [Member] Award Recipient Type Director [Member] Award Recipient Type Director [Member] Plan Name [Axis] Plan Name [Axis] Plan Name [Domain] Equity Incentive Plan 2013 [Member] Equity Incentive Plan 2013 [Member] Equity Incentive Plan 2013 [Member] Share Based Payment AwardsType [Axis] Pertinent data describing and reflecting required goals pertaining to an equity-based compensation arrangement. Share Based Payment Awards Type [Domain] Pertinent data describing and reflecting required goals pertaining to an equity-based compensation arrangement. Restricted Stock [Member] Equity Award Requirements [Axis] Equity Award Requirements [Axis] Pertinent data describing and reflecting required goals pertaining to an equity-based compensation arrangement. Equity Award Requirements [Domain] Equity Award Requirements [Domain] Pertinent data describing and reflecting required goals pertaining to an equity-based compensation arrangement. Company Performance Awards [Member] Company Performance Awards [Member] Company performance requirements for awards of restricted stock to be made. Shareholder Return Awards [Member] Shareholder Return Awards [Member] Shareholder requirements for awards of restricted stock to be made. Individual performance awards [Member] Individual performance awards [Member] Individual performance awards [Member] Service Condition Only Awards [Member] Service Condition Only Awards [Member] Service Condition Only Awards [Member] Schedule of Share-based Compensation Arrangement by Share-based Payment Award Benefit Group Type [Axis] Schedule of Share based Compensation Arrangement by Share based Payment Award Benefit Group Type [Axis] Pertinent data describing and reflecting required disclosures pertaining to an equity-based compensation arrangement, by plan. Share-based Compensation Arrangements by Share-based Payment Award Benefit Group Name [Domain] Share based Compensation Arrangements by Share based Payment Award Benefit Group Name [Domain] Equity-based compensation plans and award types, including multiple equity-based payment arrangements. Executive Officer [Member] Executive Officer [Member] Share-based Compensation Arrangement by Share-based Payment Award [Line Items] Stock-based compensation costs capitalized as development costs Employee Service Share-based Compensation, Allocation of Recognized Period Costs, Capitalized Amount Allocated Share-based Compensation Expense Grant date fair value of shares issued (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 Shares withheld for tax obligations Shares Paid for Tax Withholding for Share Based Compensation Fair value of shares vested as of the vesting date Fair value of shares vested as of the vesting date The vesting-date fair value of options granted during the reporting period as calculated by applying the disclosed option pricing methodology. Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Number of Shares [Roll Forward] Unvested at beginning of period (in shares) Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Number Granted (in shares) Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period Forfeited (in shares) Share-based Compensation Arrangement by Share-based Payment Award, Non-Option Equity Instruments, Forfeitures Vested (in shares) Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Vested in Period Unvested at end of period (in shares) Weighted Average Grant Date Fair Value [Abstract] Unvested at beginning of period (per share) Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Weighted Average Grant Date Fair Value Granted (per share) Forfeited (per share) Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Forfeitures, Weighted Average Grant Date Fair Value Vested (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 Unvested at end of period (per share) Share Based Compensation Arrangement by Share Based Payment Award, Equity Instruments Other Than Options, Percent of vesting that occurred on grant date Share Based Compensation Arrangement by Share Based Payment Award, Equity Instruments Other Than Options, Percent of vesting that occurred on grant date Share Based Compensation Arrangement by Share Based Payment Award, Equity Instruments Other Than Options, Percent of vesting that occurred on grant date Share Based Compensation Arrangement by Share Based Payment Award, Equity Instruments Other Than Options, Percent of future vesting that will occur on performance determination date Share Based Compensation Arrangement by Share Based Payment Award, Equity Instruments Other Than Options, Percent of future vesting that will occur on grant date The percentage of shares to be awarded in the future that will vest on the grant date. Share Based Compensation Arrangement By Share Based Payment Award Possible Shares To Be Awarded Vesting Rights Share Based Compensation Arrangement By Share Based Payment Award Possible Shares To Be Awarded Vesting Rights For possible share-based compensation plans to be awarded in the future, a description of the award terms as to how many shares or portion of an award will be no longer contingent on satisfaction of either a service condition, market condition or a performance condition, thereby giving the employee the legal right to convert the award to shares, to sell the shares, and be entitled to the cash proceeds of such sale. Equity Instruments other than options, number of plans Equity Instruments other than options, number of plans Equity Instruments other than options, number of plans Number of years in total shareholder return performance period Number of years in total shareholder return performance period Number of years in total shareholder return performance period Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Rights, Percentage Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Rights, Percentage Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other Than Options, Potential Grants in Future Period (minimum) Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other Than Options, Potential Grants in Future Period (minimum) The minimum number of shares to be granted in a future period on other than stock option plans. Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other Than Options, Potential Grants in Future Period (maximum) Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other Than Options, Potential Grants in Future Period (maximum) The maximum number of shares to be granted in a future period on other than stock option plans. Share Based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Vesting Rights (% vesting per year in future years) Share Based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Vesting Rights (% vesting per year in future years) Share Based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Vesting Rights (% vesting per year in future years) New Accounting Pronouncements and Changes in Accounting Principles [Abstract] Accounting Changes [Text Block] Accounting Changes [Text Block] Carrying amounts and fair value of financial instruments Fair Value, by Balance Sheet Grouping [Table Text Block] DEVELOPMENT [Abstract] Percentage of Property Occupation by Tenants when Development Cost Ceased Being Capitalized Percentage of Occupation When Development Cost Ceased Being Capitalized Threshold percentage of occupation by tenants when the development cost on a property is no longer capitalized. Length of Time After Project Completion When Development Cost are no Longer Capitalized Length of Time After Project Completion When Development Cost Ceased Being Capitalized Length of Time (in years) After Project Completion When Development Cost Ceased Being Capitalized Schedule of Long-term Debt Instruments [Table] Schedule of Long-term Debt Instruments [Table] Variable Rate [Axis] Variable Rate [Axis] Variable Rate [Domain] Variable Rate [Domain] Debt Instrument, Redemption, Period [Axis] Debt Instrument, Redemption, Period [Axis] Debt Instrument, Redemption, Period [Domain] Debt Instrument, Redemption, Period [Domain] Debt Instrument [Line Items] Debt Instrument [Line Items] Long term debt, by type [Table Text Block] Long term debt, by type [Table Text Block] Long term debt, by type [Table Text Block] Principal payments due during the next five years Schedule of Maturities of Long-term Debt [Table Text Block] COMPREHENSIVE INCOME [Abstract] COMPREHENSIVE INCOME [Abstract] Schedule of Accumulated Other Comprehensive Income (Loss) [Table Text Block] Schedule of Accumulated Other Comprehensive Income (Loss) [Table Text Block] Stock-Based Compensation Disclosure of Compensation Related Costs, Share-based Payments [Text Block] Comprehensive Income (Loss) Note [Text Block] Comprehensive Income (Loss) Note [Text Block] Other Liabilities Disclosure [Abstract] Other Liabilities Other Liabilities Disclosure [Text Block] Payables and Accruals [Abstract] Summary of Accounts Payable and Accrued Expenses Schedule of Accounts Payable and Accrued Liabilities [Table Text Block] Development Development [Text Block] This element represents certain disclosures of accounting policies and procedures around real estate development. Consolidation Consolidation, Policy [Policy Text Block] Use of Estimates Use of Estimates, Policy [Policy Text Block] Discontinued Operations Discontinued Operations, Policy [Policy Text Block] Real Estate Property Acquisitions and Acquired Intangibles [Policy Text Block] Real Estate Property Acquisitions and Acquired Intangibles [Policy Text Block] Real Estate Property Acquisitions and Acquired Intangibles [Policy Text Block] Earnings Per Share, Policy [Policy Text Block] Earnings Per Share, Policy [Policy Text Block] Share-based Compensation, Option and Incentive Plans Policy [Policy Text Block] Share-based Compensation, Option and Incentive Plans Policy [Policy Text Block] Fair Value Measurement, Policy [Policy Text Block] Fair Value Measurement, Policy [Policy Text Block] Recent Accounting Pronouncements [Policy Text Block] Recent Accounting Pronouncements [Policy Text Block] Recent Accounting Pronouncements [Policy Text Block] Other Assets Deferred Costs, Capitalized, Prepaid, and Other Assets Disclosure [Table Text Block] Other Liabilities, Unclassified [Abstract] Security deposits Security Deposit Liability Prepaid rent and other deferred income Advance Rent Acquired Below Market Lease Intangibles Acquired Below Market Lease Intangibles, Gross Acquired Below Market Lease Intangibles, Gross Accumulated Amortization of Acquired Below Market Lease Intangibles Accumulated Amortization, Acquired Below Market Lease Intangibles Accumulated Amortization, Acquired Below Market Lease Intangibles Acquired Below Market Lease Intangibles, Net of Accumulated Amortization Acquired Below Market Lease Intangibles, Net Acquired Below Market Lease Intangibles, Net Interest rate swap liabilities Interest Rate Cash Flow Hedge Liability at Fair Value Prepaid tenant improvement reimbursements Prepaid tenant improvement reimbursements Prepaid tenant improvement reimbursements Other liabilities Other Liabilities, Current Other Liabilities - total Fair Value, by Balance Sheet Grouping [Table] Measurement Basis [Axis] Fair Value Measurement [Domain] Fair Value Measurement [Domain] Portion at Fair Value Measurement [Member] Portion at Fair Value Measurement [Member] Fair Value [Member] Estimate of Fair Value Measurement [Member] Carrying Amount [Member] Reported Value Measurement [Member] Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] Financial Assets [Abstract] Financial Instruments, Financial Assets, Balance Sheet Groupings [Abstract] Cash and Cash Equivalents, at Carrying Value Cash and Cash Equivalents, at Carrying Value Cash and Cash Equivalents, Fair Value Disclosure Cash and Cash Equivalents, Fair Value Disclosure Mortgage loans receivable Loans Receivable, Fair Value Disclosure Interest rate swap assets Interest Rate Derivative Assets, at Fair Value Financial Liabilities [Abstract] Financial Instruments, Financial Liabilities, Balance Sheet Groupings [Abstract] Unsecured bank credit facilities - variable rate Unsecured bank credit facilities - variable rate - Fair Value Disclosure Unsecured bank credit facilities - variable rate - Fair Value Disclosure Unsecured bank credit facilities - fixed rate Unsecured bank credit facilities - fixed rate - Fair Value Disclosure Unsecured bank credit facilities - fixed rate - Fair Value Disclosure Unsecured debt Fair Value Disclosure Unsecured debt Fair Value Disclosure This element represents the portion of the balance sheet assertion valued at fair value by the entity whether such amount is presented as a separate caption or as a parenthetical disclosure. Additionally, this element may be used in connection with the fair value disclosures required in the footnote disclosures to the financial statements. The element may be used in both the balance sheet and disclosure in the same submission. This item represents unsecured debt payable as of the balance sheet date. Secured debt Secured debt Fair Value Disclosure This element represents the portion of the balance sheet assertion valued at fair value by the entity whether such amount is presented as a separate caption or as a parenthetical disclosure. Additionally, this element may be used in connection with the fair value disclosures required in the footnote disclosures to the financial statements. The element may be used in both the balance sheet and disclosure in the same submission. This item represents secured debt payable as of the balance sheet date. Interest rate swap liabilities Derivative Liability Accounts Payable and Accrued Expenses Accounts Payable and Accrued Liabilities Disclosure [Text Block] Schedule of Derivative Instruments [Table Text Block] Schedule of Derivative Instruments [Table Text Block] Schedule of Derivative Instruments in Statement of Financial Position, Fair Value [Table Text Block] Schedule of Derivative Instruments in Statement of Financial Position, Fair Value [Table Text Block] Schedule of Derivative Instruments, Gain (Loss) in Statement of Financial Performance [Table Text Block] Derivative Instruments, Gain (Loss) [Table Text Block] Subsequent Events [Abstract] Subsequent Event [Table] Subsequent Event [Table] Subsequent Event [Line Items] Subsequent Event [Line Items] Subsequent Events [Text Block] Subsequent Events [Text Block] $60 million senior unsecured private placement notes (2018) [Member] $60 million senior unsecured private placement notes (2018) [Member] $60 million senior unsecured private placement notes (2018) [Member] Subsequent Event [Member] Subsequent Event [Member] Unsecured debt, notional amount Unsecured debt, notional amount Unsecured debt, notional amount Debt, term (in years) Debt, term (in years) Debt, term (in years) Debt Instrument, Interest Rate, Stated Percentage Debt Instrument, Interest Rate, Stated Percentage Statement of Cash Flows [Abstract] Supplemental Cash Flow Information [Abstract] Cash paid for interest, net of amount capitalized Interest Paid, Capitalized Real Estate Investment Property, Net [Abstract] Real Estate Properties Real Estate Disclosure [Text Block] Other Assets Components [Abstract] Other Assets, Unclassified [Abstract] Leasing costs (principally commissions) Deferred Costs, Leasing, Gross Accumulated amortization of leasing costs Deferred Costs, Leasing, Accumulated Amortization Leasing costs (principally commissions), net of accumulated amortization Deferred Costs, Leasing, Net Straight-line rents receivable Deferred Rent Receivables, Gross The cumulative difference between the rental payments required by a lease agreement and the rental income or expense recognized on a straight-line basis, or other systematic and rational basis more representative of the time pattern in which use or benefit is granted or derived from the leased property, expected to be recognized in income or expense over the term of the leased property, by the lessor or lessee, respectively. Allowance for doubtful accounts on straight-line rents receivable Allowance For Doubtful Accounts Receivable Straight Line Rent Current A valuation allowance for straight-line rent receivable due to the Company within one year (or the normal operating cycle, whichever is longer) that are expected to be uncollectible. Straight-line rents receivable, net of allowance for doubtful accounts Deferred Rent Receivables, Net Accounts receivable Accounts Receivable, Gross, Current Allowance for doubtful accounts on accounts receivable Allowance for Doubtful Accounts Receivable, Current Accounts receivable, net of allowance for doubtful accounts Accounts Receivable, Net Acquired in-place lease intangibles Finite-Lived Intangible Asset, Acquired-in-Place Leases Accumulated amortization of acquired in-place lease intangibles Acquired in place lease intangibles, accumulated amortization The accumulated amount of amortization of in-place lease intangibles. Acquired in-place lease intangibles, net of accumulated amortization Acquired In Place Lease Intangibles Net Of Accumulated Amortization This element represents the amount of value allocated by a lessor (acquirer) to lease agreements which exist at acquisition of a leased property less accumulated amortization and any impairment charges. Acquired above market lease intangibles Acquired above market lease intangibles This element represents the amount of value allocated by a lessor (acquirer) to lease agreements which exist at acquisition of a leased property. Accumulated amortization of acquired above market lease intangibles Accumulated amortization Acquired above market lease intangibles The accumulated amount of amortization of a major finite-lived intangible asset class. A major class is composed of intangible assets that can be grouped together because they are similar, either by their nature or by their use in the operations of a company. Acquired above market lease intangibles, net of accumulated amortization Acquired Above Market Leases Net Of Accumulated Amortization This element represents the amount of value allocated by a lessor (acquirer) to lease agreements which exist at acquisition of a leased property, net of accumulated amortization. Such amount may include the value assigned to existing tenant relationships and excludes the market adjustment component of the value assigned for above . Mortgage loans receivable Loans and Leases Receivable, Gross, Consumer, Real Estate Interest rate swap assets Interest Rate Cash Flow Hedge Asset at Fair Value Goodwill Goodwill Prepaid expenses and other assets Prepaid Expense and Other Assets Other Assets Total Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Table] Disposal Groups, Including Discontinued Operations [Table] Long Lived Assets Held-for-sale by Asset Type [Axis] Long Lived Assets Held-for-sale by Asset Type [Axis] Long Lived Assets Held-for-sale, Name [Domain] Long Lived Assets Held-for-sale, Name [Domain] Real Estate, Type of Property [Axis] Real Estate, Type of Property [Axis] Real Estate [Domain] Real Estate [Domain] Land [Member] Land [Member] Disposal Group Name [Axis] Disposal Group Name [Axis] Disposal Group Name [Domain] Disposal Group Name [Domain] 2017 Operating Property Sales (Stemmons Circle, Techway Southwest I-IV) [Member] 2017 Operating Property Sales (Stemmons Circle, Techway Southwest I-IV) [Member] 2017 Operating Property Sales (Stemmons Circle, Techway Southwest I-IV) [Member] 2018 Operating Property Sales [Member] 2018 Operating Property Sales [Member] 2018 Operating Property Sales [Member] Long Lived Assets Held-for-sale [Line Items] Long Lived Assets Held-for-sale [Line Items] SIze (in acres) of land sold SIze (in acres) of land sold SIze (in acres) of land sold Square Footage of Real Estate Property Area of Real Estate Property Gain (Loss) on Sale of Properties Gain (Loss) on Sale of Properties Proceeds from Sale of Property, Plant, and Equipment Proceeds from Sale of Property, Plant, and Equipment Loss on sales of land Loss on sales of land Loss on sales of land Gain on sales of land Gain on sales of land Gain on sales of land Accounts Payable and Accrued Liabilities [Abstract] Property taxes payable Accrual for Taxes Other than Income Taxes Development costs payable Construction Payable Property capital expenditures payable Property capital expenditures payable Property capital expenditures payable Interest payable Interest Payable Dividends payable on unvested restricted stock Dividends Payable Book Overdraft Book overdraft Represents unfunded outstanding checks for which the bank has not advanced cash to the Company. Other payables and accrued expenses Accounts Payable, Other Accounts payable and accrued expenses Derivative [Table] Derivative [Table] Derivative Instrument [Axis] Derivative Instrument [Axis] Derivative Contract [Domain] Derivative Contract [Domain] Interest Rate Swap [Member] Interest Rate Swap [Member] Hedging Designation [Axis] Hedging Designation [Axis] Hedging Designation [Domain] Hedging Designation [Domain] Designated as Hedging Instrument [Member] Designated as Hedging Instrument [Member] Interest Rate Swap Identifier [Axis] Interest Rate Swap Identifier [Axis] Interest Rate Swap Identifier [Axis] Interest Rate Swap Identifier [Domain] Interest Rate Swap Identifier [Domain] [Domain] for Interest Rate Swap Identifier [Axis] $80 million interest rate swap [Member] $80 million interest rate swap [Member] $80 million interest rate swap [Member] $75 million interest rate swap executed in 2014 [Member] $75 million interest rate swap executed in 2014 [Member] $75 million interest rate swap executed in 2014 [Member] $75 million interest rate swap executed in 2015 [Member] $75 million interest rate swap executed in 2015 [Member] $75 million interest rate swap executed in 2015 [Member] $65 million interest rate swap executed in 2016 [Member] $65 million interest rate swap executed in 2016 [Member] $65 million interest rate swap executed in 2016 [Member] $60 million interest rate swap [Member] $60 million interest rate swap [Member] $60 million interest rate swap [Member] $40 million interest rate swap (2016) [Member] $40 million interest rate swap (2016) [Member] $40 million interest rate swap (2016) [Member] $15 million interest rate swap [Member] $15 million interest rate swap [Member] $15 million interest rate swap [Member] Other Assets [Member] Other Assets [Member] Other Liabilities [Member] Other Liabilities [Member] Derivative [Line Items] Derivative [Line Items] Number of interest rate swaps Number of interest rate swaps Number of interest rate swaps Notional Amount of Interest Rate Derivatives Derivative, Notional Amount Interest Rate Cash Flow Hedge Assets at Fair Value Interest rate cash flow hedge liabilities at fair value Derivative Instruments, Income Recognized in Other Comprehensive Income, Effective Portion, Net Derivative Instruments, Gain (Loss) Recognized in Other Comprehensive Income (Loss), Effective Portion, Net Amount of (income) loss reclassified from accumulated other comprehensive income into interest expense Amount of loss reclassified from accumulated other comprehensive income (loss) to interest expense Amount of loss reclassified from accumulated other comprehensive income (loss) to interest expense Cash flow hedge amount to be reclassified to Interest Expense in next 12 months [Line Items] Cash flow hedge amount estimated to be reclassified to interest expense in next 12 months Cash flow hedge amount estimated to be reclassified to interest expense in next 12 months Interest rate swap cash flow hedge termination value Interest rate swap cash flow hedge termination value Interest rate swap cash flow hedge termination value Earnings per Share Earnings Per Share [Text Block] Summary of other liabilities Summary of other liabilities [Table Text Block] Tabular disclosure of other liabilities not separately disclosed on the balance sheet DEBT Mortgage Notes Payable Disclosure [Text Block] Schedule of Real Estate Properties Schedule of Real Estate Properties [Table Text Block] Schedule of Real Estate Properties [Table] Schedule of Real Estate Properties [Table] Range [Axis] Range [Axis] Range [Domain] Range [Domain] Minimum [Member] Minimum [Member] Maximum [Member] Maximum [Member] Property, Plant and Equipment, Type [Axis] Property, Plant and Equipment, Type [Axis] Property, Plant and Equipment, Type [Domain] Property, Plant and Equipment, Type [Domain] Building [Member] Building [Member] Improvements [Member] Improvements and Personal Property [Member] Improvements and Personal Property [Member] Real Estate Properties [Line Items] Real Estate Properties [Line Items] Property, Plant and Equipment, Useful Life Property, Plant and Equipment, Useful Life Depreciation Expense During the Period Cost of Services, Depreciation Real Estate Properties Real Estate Investments, Net [Abstract] Land Land Building and building improvements Investment Building and Building Improvements Tenant and other improvements Tenant Improvements BASIC EPS COMPUTATION FOR NET INCOME AVAILABLE TO EASTGROUP PROPERTIES, INC. COMMON STOCKHOLDERS [Abstract] Numerator – net income attributable to common stockholders Denominator - Weighted average shares outstanding DILUTED EPS COMPUTATION FOR NET INCOME ATTRIBUTABLE TO EASTGROUP PROPERTIES, INC. COMMON STOCKHOLDERS Unvested restricted stock Incremental Common Shares Attributable To Nonvested Restricted Stock Additional shares included in the calculation of diluted EPS as a result of the potentially dilutive effect of nonvested restricted stock using the treasury stock method. Total Shares Balance at Beginning of Period, Accumulated Other Comprehensive Income Net unrealized change in fair value of interest rate swaps - cash flow hedges Balance at End of Period, Accumulated Other Comprehensive Income OPERATING ACTIVITIES Net Cash Provided by (Used in) Operating Activities [Abstract] 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 Stock-based compensation expense Share-based Compensation Net gain (loss) on sales of real estate investments and non-operating real estate Gain (Loss) on Sale of Property, Plant, Equipment and Real Estate Properties Gain (Loss) on Sale of Property, Plant, Equipment and Real Estate Properties Changes in operating assets and liabilities: Increase (Decrease) in Operating Capital [Abstract] Accrued income and other assets Increase (Decrease) in Operating Assets Accounts payable, accrued expenses and prepaid rent Increase (Decrease) in Accounts Payable and Accrued Liabilities Other Other Operating Activities, Cash Flow Statement 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] Real estate development Payments to Develop Real Estate Assets Purchases of real estate Payments to Acquire Commercial Real Estate Real estate improvements Payments for Capital Improvements Net proceeds from sales of real estate investments and non-operating real estate Proceeds from Sale of Real Estate Held-for-investment Repayments on mortgage loans receivable Repayments on mortgage loans receivable The cash inflow from the repayments received on collateralized mortgage receivables. Changes in accrued development costs Changes in accrued development costs The net cash inflow from (outflow for) expenditures for a real estate project that has not yet been completed. Changes in other assets and other liabilities Payments for (Proceeds from) Other Investing Activities NET CASH USED IN INVESTING ACTIVITIES Net Cash Provided by (Used in) Investing Activities FINANCING ACTIVITIES Net Cash Provided by (Used in) Financing Activities [Abstract] Repayments on unsecured bank credit facilities Repayments on secured debt Repayments of Secured Debt Debt issuance costs Payments of Debt Issuance Costs Distributions paid to stockholders (not including dividends accrued on unvested restricted stock) Payments of Ordinary Dividends Proceeds from common stock offerings Proceeds from Issuance of Common Stock Proceeds from dividend reinvestment plan Proceeds from dividend reinvestment plan The cash inflow associated with the amount received from the Company's dividend reinvestment plan (DRIP) for the value of stock issued during the period. Other Proceeds from (Payments for) Other Financing Activities NET CASH (USED IN) PROVIDED BY FINANCING ACTIVITIES Net Cash Provided by (Used in) Financing Activities INCREASE (DECREASE) IN CASH AND CASH EQUIVALENTS Cash and Cash Equivalents, Period Increase (Decrease) CASH AND CASH EQUIVALENTS AT BEGINNING OF PERIOD CASH AND CASH EQUIVALENTS AT END OF PERIOD SUPPLEMENTAL CASH FLOW INFORMATION Cash paid for interest, net of amount capitalized of $1,602 and $1,646 for 2017 and 2016, respectively Interest Paid, Net