Class Of Stock [Axis] Series B Preferred Stock [Member] Real Estate Property Ownership [Axis] O'Fallon (St. Louis) MO [Member] Roanoke, VA [Member] Ridgeland (Jackson), MS [Member] Measurement Frequency [Axis] Fair Value Measurements [Member] Major Types of Debt and Equity Securities [Axis] Preferred Stock [Member] Fair Value, Hierarchy [Axis] Level 3 [Member] Mortgage Backed Securities [Member] Common Stock [Member] Level 2 [Member] Level 1 [Member] Series C Preferred Stock [Member] Award Type [Axis] Stock Option [Member] Plan Name [Axis] 2007 Plan [Member] Range [Axis] Maximum [Member] Restricted Stock Units (RSUs) [Member] Real Estate, Type of Property [Axis] Industrial Building [Member] Fedex Ground Package System Inc. [Member] White Bear Lake, MN [Member] Fedex And Fedex Subsidiaries [Member] Fedex Corporation [Member] Fedex Corporation Subsidiaries [Member] Concentration Risk Type [Axis] Rental And Reimbursement Revenue [Member] Scenario [Axis] Fiscal 2017 [Member] Business Acquisition [Axis] UMH Properties, Inc [Member] Series A Cumulative Redeemable Preferred Stock [Member] Series B Cumulative Redeemable Preferred Stock [Member] Minimum [Member] Two Mortgages Loans [Member] Three Mortgages Loans [Member] Report Date [Axis] May 1, 2017 [Member] Debt Instrument [Axis] Term Loans [Member] Term Loan One [Member] Term Loan Two [Member] Short-term Debt, Type [Axis] Line of Credit [Member] Dividend Reinvestment and Stock Purchase Plan [Member] Equity Components [Axis] Series C Cumulative Redeemable Preferred Stock [Member] Mortgage Notes Payable Fair Value [Member] Financial Instrument [Axis] Property Purchase Agreement [Member] Investment Grade Tenants Or Subsidiaries [Member] FDX and Subsidiaries [Member] Subsequent Event Type [Axis] Subsequent Event [Member] Related Party [Axis] Common Shareholders [Member ] Series B Preferred Shareholders [Member] Series C Preferred Shareholders [Member] Common and Preferred Stock [Member] Restricted Stock [Member] Adjustments for New Accounting Pronouncements [Axis] Accounting Standards Update 2015-03 [Member] Milwaukee Electric Tool [Member] Rockford, IL [Member] Amended and Restated Incentive Award Plan [Member] Stock Option 1 [Member] Stock Option 2 [Member] Stock Option Two [Member] Debt Security Category [Axis] Securities One [Member] Securities Two [Member] Fedex Ground Package System Inc. [Member] Nine Mortgages Loans [Member] Mortgage Loan, Original Amount [Axis] Document and Entity Information [Abstract] Entity Registrant Name Entity Central Index Key Document Type Document Period End Date Amendment Flag Current Fiscal Year End Date Entity Filer Category Entity Common Stock, Shares Outstanding Trading Symbol Document Fiscal Period Focus Document Fiscal Year Focus Statement [Table] Statement [Line Items] Class of Stock [Axis] ASSETS Real Estate Investments: Land Buildings and Improvements Total Real Estate Investments Accumulated Depreciation Real Estate Investments Cash and Cash Equivalents Securities Available for Sale at Fair Value Tenant and Other Receivables Deferred Rent Receivable Prepaid Expenses Capitalized Lease Costs, net of Accumulated Amortization of $3,512,238 and $3,238,516, respectively Intangible Assets, net of Accumulated Amortization of $12,841,419 and $12,332,599, respectively Financing Costs, net of Accumulated Amortization of $431,765 and $246,678, respectively Other Assets TOTAL ASSETS LIABILITIES AND SHAREHOLDERS' EQUITY Liabilities: Fixed Rate Mortgage Notes Payable, net of Unamortized Debt Issuance Costs Loans Payable Accounts Payable and Accrued Expenses Other Liabilities Preferred Stock Called for Redemption Total Liabilities COMMITMENTS AND CONTINGENCIES Shareholders' Equity: Preferred Stock, Value Common Stock, $0.01 Par Value Per Share: 193,289,750 and 194,600,000 Shares Authorized as of March 31, 2017 and September 30, 2016, respectively; 72,107,640 and 68,920,972 Shares Issued and Outstanding as of March 31, 2017 and September 30, 2016, respectively Excess Stock - $0.01 Par Value Per Share: 200,000,000 Shares Authorized as of March 31, 2017 and September 30, 2016; No Shares Issued or Outstanding as of March 31, 2017 and September 30, 2016 Additional Paid-In Capital Accumulated Other Comprehensive Income Undistributed Income Total Shareholders' Equity TOTAL LIABILITIES & SHAREHOLDERS' EQUITY Accumulated amortization of lease costs Accumulated amortization of intangible assets Accumulated amortization of financing costs Cumulative redeemable preferred, stock dividend rate Preferred stock, par value Preferred stock, shares authorized Preferred stock, shares issued Preferred stock, shares outstanding Common stock, par value Common Stock, shares authorized Common Stock, shares issued Common Stock, shares outstanding Excess Stock, par value Excess Stock , shares authorized Excess Stock , shares issued Excess Stock , shares outstanding Income Statement [Abstract] INCOME: Rental Revenue Reimbursement Revenue TOTAL INCOME EXPENSES: Real Estate Taxes Operating Expenses General & Administrative Expenses Acquisition Costs Depreciation Amortization of Capitalized Lease Costs and Intangible Assets TOTAL EXPENSES OTHER INCOME (EXPENSE): Dividend and Interest Income Gain on Sale of Securities Transactions Interest Expense, including Amortization of Financing Costs TOTAL OTHER INCOME (EXPENSE) NET INCOME Less: Preferred Dividends NET INCOME ATTRIBUTABLE TO COMMON SHAREHOLDERS BASIC INCOME - PER SHARE Net Income Less: Preferred Dividends Net Income Attributable to Common Shareholders - Basic DILUTED INCOME - PER SHARE Net Income Less: Preferred Dividends Net Income Attributable to Common Shareholders - Diluted WEIGHTED AVERAGE COMMON SHARES OUTSTANDING Basic Diluted Statement of Comprehensive Income [Abstract] Net Income Other Comprehensive Income: Unrealized Holding Gains Arising During the Period Reclassification Adjustment for Net Gains Realized in Income TOTAL COMPREHENSIVE INCOME Less: Preferred Dividend COMPREHENSIVE INCOME ATTRIBUTABLE TO COMMON SHAREHOLDERS Statement of Cash Flows [Abstract] CASH FLOWS FROM OPERATING ACTIVITIES Noncash Items Included in Net Income: Depreciation & Amortization Stock Compensation Expense Gain on Sale of Securities Transactions Loss on Sale of Real Estate Investment Changes In: Tenant, Deferred Rent and Other Receivables Prepaid Expenses Other Assets and Capitalized Lease Costs Accounts Payable, Accrued Expenses and Other Liabilities NET CASH PROVIDED BY OPERATING ACTIVITIES CASH FLOWS FROM INVESTING ACTIVITIES Purchase of Real Estate and Intangible Assets Capital Improvements Proceeds on Sale of Real Estate Return of Deposits on Real Estate Deposits Paid on Acquisitions of Real Estate Proceeds from Sale of Securities Available for Sale Purchase of Securities Available for Sale NET CASH USED IN INVESTING ACTIVITIES CASH FLOWS FROM FINANCING ACTIVITIES Net (Repayments) Proceeds from Loans Payable Proceeds from Fixed Rate Mortgage Notes Payable Principal Payments on Fixed Rate Mortgage Notes Payable Financing Costs Paid on Debt Proceeds from the Exercise of Stock Options Redemption of Series A Preferred Stock Proceeds from Underwritten Public Offering of Preferred Stock, net of offering costs Proceeds from Issuance of Common Stock in the DRIP, net of Dividend Reinvestments Preferred Dividends Paid Common Dividends Paid, net of Reinvestments NET CASH (USED IN) PROVIDED BY FINANCING ACTIVITIES NET DECREASE IN CASH AND CASH EQUIVALENTS CASH AND CASH EQUIVALENTS - BEGINNING OF PERIOD CASH AND CASH EQUIVALENTS - END OF PERIOD Organization, Consolidation and Presentation of Financial Statements [Abstract] Organization and Accounting Policies Earnings Per Share [Abstract] Net Income Per Share Real Estate [Abstract] Real Estate Investments Investments, Debt and Equity Securities [Abstract] Securities Available for Sale at Fair Value Debt Disclosure [Abstract] Debt Equity [Abstract] Shareholders' Equity Fair Value Disclosures [Abstract] Fair Value Measurements Supplemental Cash Flow Elements [Abstract] Supplemental Cash Flow Information Commitments and Contingencies Disclosure [Abstract] Contingencies and Commitments Subsequent Events [Abstract] Subsequent Events Use of Estimates Reclassification Lease Termination Income Stock Compensation Plan Recent Accounting Pronouncements Segment Reporting & Financial Information Organization And Accounting Policies Tables Summary of Stock Options Outstanding Schedule of Stock Options, Valuation Assumptions Summary of Income or Operation Statements Schedule of Pro Forma Information Securities Available For Sale At Fair Value Tables Summary of Temporarily Impaired Securities Summary of Range Losses Schedule of Fixed Rate Mortgage Notes Payable Summary of Securities Available for Sale at Fair Value Number of real estate properties owned Total square foot of property Occupancy percentage REIT investment securities, description Lease termination income description Lease termination income Options to purchase shares of common stock under original plan Shares were available to grant as stock options or as restricted stock Common stock par value Stock option plan expiry date Number of stock shares granted during period Stock based compensation expense Fair value of options granted per option Exercised options to purchase of common stock shares Weighted average exercise price Proceeds from stock options exercised Outstanding options to purchase of common stock Aggregate intrinsic value of options outstanding Reduction in fixed rate mortgage note payable liability Reclassification of amortization of financing costs Date of Grant Number of Employees Number of Shares Option Price Expiration Date Disclosure of Compensation Related Costs, Share-based Payments [Abstract] Dividend yield Expected volatility Risk-free interest rate Expected lives (years) Estimated forfeitures Common stock equivalents included in the diluted weighted average shares outstanding Antidilutive securities SEC Schedule III, Real Estate and Accumulated Depreciation, by Property [Table] SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items] Purchase of industrial building (square foot) Percentage of building area leased Lease term Lease term expiration period Purchase price of industrial building Mortgage loan amortization period Face amount of mortgages Mortgage loans on real estate, interest rate Annual rental income over the remaining term of lease Allocated to intangible assets Expansion square feet Cost of building expansion Lease expiration date description Increase in rent Rent prior to expansion Rent prior to expansion, per square foot Rent increase to after expansion Rent increase to after expansion, per square foot Sale of industrial building (square foot) Area of property Net proceeds from sale of property Square feet of real estate property leased Percentage of real estate property leased Weighted average lease maturity Percentage of rental space and tenant account, description Total property (square foot) Percentage of aggregate rental and reimbursement revenue Held marketable securities Percentage of un depreciated assets Rental and Reimbursement Revenue Real Estate Taxes Operating Expenses Depreciation & Amortization Interest Expense Loss from Operations Loss on Sale of Real Estate Investment Net Loss Rental Revenues Net Income Attributable to Common Shareholders Basic and Diluted Net Income per Share Attributable to Common Shareholders Schedule of Available-for-sale Securities [Table] Schedule of Available-for-sale Securities [Line Items] Securities available for sale at fair value Security available for sale, maximum percentage of investment on un depreciated assets Proceeds from sales or redemptions of securities available for sale Gain on sale of securities available for sale Purchase of securities available for sale UMH common shares purchased during the quarter Cost of securities purchased Weighted average cost per share Number of shares purchased through UMH's dividend reinvestment Shares owned by company Shares owned, cost Available for sale securities, shares Dividend rate of preferred stock held as security for loan Net unrealized gains on securities portfolio Less than 12 Months, Fair Value Less than 12 Months, Unrealized Losses 12 Months or Longer, Fair Value 12 Months or Longer, Unrealized Losses Number of Individual Securities Fair Value Unrealized Losses Range of Loss Interest expense Annual interest rate Weighted average interest rate percentage Notes payable maturity period Proceeds from fixed rate mortgage notes payable Repayment of mortgage payable Repayment of loans payable Annual interest variable rate basis Total availability of unsecured credit facility Debt maturity date Repayment of line of credit Line of credit facility drawn down Line of credit facility interest rate terms Line of credit facility related to accordion feature Total potential available under unsecured line of credit Fixed Rate Mortgage Notes Payable Debt Issuance Costs Accumulated Amortization of Debt Issuance Costs Unamortized Debt Issuance Costs Weighted Average Interest Rate Schedule of Subsidiary or Equity Method Investee [Table] Subsidiary or Equity Method Investee [Line Items] Common stock, shares authorized Common stock, shares issued Common stock, shares outstanding Excess stock, shares authorized Percentage increase in common stock dividend Common stock dividend, description Annualized dividend rate per share price Dividend per common stock Cash raised from issuance of common stock under DRIP Amount of dividend reinvested Common stock issued under plan Cash dividends paid Dividend declared per share Declaration date Dividends payable, date to be paid Record date Share Repurchase Program authorizes amount Preferred stock redemption price Dividend payable Preferred stock accrued dividend per share Net accrued dividend paid at redemption Dividend per preferred stock Annual rate of dividends cumulative and payable Number of additional preferred stock shares issued during the period Series B redeemable preferred stock, shares Cumulative redeemable preferred, stock dividend rate Preferred shares redemption charges Cumulative redeemable preferred, stock dividend, per share Liquidation preference per share Public offering price per share Gross proceeds from offering Net proceeds from offering Dividend paid per share Fixed rate mortgage notes payable at fair value Fixed rate mortgage notes payable, net of unamortized debt issuance costs Fair Value Measurements, Recurring and Nonrecurring [Table] Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] Cash paid for interest Contingencies and Commitments [Table] Contingencies and Commitments [Line Items] Area of buildings (in square foot) Weighted average lease maturity term Number of real estate properties committed to purchase Aggregate purchase price of industrial properties Area leased to FDX Number of real estate properties committed to mortgage Mortgage loans committed on real estate, carrying amount of mortgage Mortgages, minimum interest rate Mortgages, maximum interest rate Mortgage loans weighted average interest rate Mortgage loans amortization period Weighted average loan term Subsequent Event [Table] Subsequent Event [Line Items] Dividend declaration date Dividend payable date of record Repayment of mortgage loans Agreement [Member] Agreement Two [Member] Altoona [Member] Altoona, PA [Member] Amount of dividend reinvested. Annualized dividend rate per share price. Acres of property. Augusta (FDX Ground) [Member] Augusta (FDX) [Member] Augusta FDX Gr. Augusta, GA (FDX Ground) [Member] Augusta, GA (FDX) [Member] Available for sale securities, Shares. BMO Capital Market [Member] BMO Capital Markets [Member] Basic and Diluted Net Income per Share Attributable to Common Shareholders. Bedford Heights (Cleveland) [Member] Bedford Heights (Cleveland), OH [Member] Bedford Heights. Bedford Heights, OH (Cleveland) [Member] Beltsville, MD (Washington, DC) [Member] Beltsville, MD (Washington, DC) [Member] Beltsville. Beltsville (Washington, DC), MD [Member] Beltsville (Washington, DC) [Member] Board of Directors [Member] Buckner, KY (Louisville) [Member] Buckner (Louisville), KY [Member] Buckner (Louisville) [Member] Buckner Building Expansion [Member] Burlington (Seattle/Everett) [Member] Burlington (Seattle/Everett), WA [Member] Burlington, WA [Member] Burlington, WA (Seattle/Everett) [Member] Burr Ridge (Chicago), IL [Member] Burr Ridge (Chicago) [Member] Burr Ridge. Amount of acquisition cost of a business combination allocated to buildings included in real estate. Business acquisition, purchase price allocation, property, plant and equipments. The pro formo depreciation and amortization for a period as if the business combination or combinations had been completed at the begining of the period. The pro forma gain on sale of real estate investment for a period as if the business combination or combinations had been completed at the begining of the period. The pro forma income loss from operations for a period as if the business combinations had been completed at the begining of the period. The pro forma interest expense for a period as if the business combination or combinations had been completed at the begining of the period. BusinessAcquisitionsProFormaNetLoss. The pro forma operating expenses for a period as if the business combination or combinations had been completed at the begining of the period. The pro forma real estate taxes for a period as if the business combination or combinations had been completed at the beginning of the period. Business Acquisitions Pro Forma Rental And Reimbursement Revenue. CBL & Associates Properties, Inc [Member] Campus Crest Communities, Inc [Member] Capitalized Lease Costs And Financing Costs [Member] Carlstadt. Carlstadt, NJ (New York, NY) [Member] Carlstadt (New York, NY) [Member] Carrollton (Dallas) [Member] Carrollton (Dallas), TX [Member] Carrollton, TX (Dallas) [Member] Cedar Realty Trust, Inc [Member] Charlotte Metropolitan Statistical Area [Member] Charlottesville [Member] Charlottesville, VA [Member] Chattanooga [Member] Chattanooga, TN [Member] Cheektowaga (Buffalo) [Member] Cheektowaga (Buffalo), NY [Member] Cheektowaga. Cheektowaga, NY (Buffalo) [Member] Chesapeake Lodging Trust [Member] Cincinnati MSA [Member] Cincinnati [Member] Cincinnati, OH [Member] Cocoa, FL [Member] Cocoa, FL [Member] Colorado Springs, CO [Member] Colorado Springs, CO [Member] Colorado Springs, CO [Member] Colorado Springs [Member] Common and Preferred Stock [Member] Common Shareholders [Member ] Common stock shares purchases. Common stock dividend, description. Concord (Charlotte) [Member] Concord (Charlotte), NC [Member] Concord, NC (Charlotte) [Member] Concord, NC [Member] Condor Hospitality [Member] Contingencies and Commitments. Contingencies and Commitments. Corporate Office Properties Trust [Member] Corpus Christi [Member] Corpus Christi, TX [Member] Cost of building expansion. Covington, LA [Member] Covington, LA (New Orleans) [Member] Covington (New Orleans), LA [Member] Covington (New Orleans) [Member] Cudahy. Cudahy (Milwaukee) [Member] Cudahy (Milwaukee), WI [Member] Dallas MSA [Member] Davenport, FL [Member] Davenport, FL (Orlando) [Member] Davenport (Orlando), FL [Member] Davenport (Orlando) [Member] December 31 [Member] Denver, CO [Member] Denver [Member] Dividend Distribution Four [Member] Dividend Distribution One [Member] Dividend Distribution Three [Member] Dividend Distribution Two [Member] Dividend paid per share. Dividend rate in percentage of preferred stock. Dividend rate of preferred stock held as security for loan. Dividend Reinvestment and Stock Purchase Plan [Member] Dividend Reinvestment and Stock Purchase Plan [Member] Dividend reinvestment and stock purchase plan weighted average cost per share. Dynex Capital, Inc [Member] EPR Properties [Member] Edinburg [Member] Edinburg, TX [Member] Edwardsville, KS (Kansas City)(Carlisle Tire) [Member] Edwardsville, KS (Kansas City) (International Paper) [Member] Edwardsville (Kansas City)(Carlisle Tire) [Member] Edwardsville (Kansas City)(International Paper) [Member] Edwardsville (Kansas City), KS (Carlisle) [Member] Edwardsville (Kansas City), KS (International Paper) [Member] Edwardsville. Edwardsville two. El Paso [Member] El Paso, TX [Member] El Paso, Texas. Elgin (Chicago), IL [Member] Elgin (Chicago) [Member] Elgin, IL (Chicago) [Member] Elgin. Face amount or stated value of Excess Stock per share; generally not indicative of the fair market value per share. Aggregate par or stated value of issued nonredeemable Excess Stock (or Excess Stock redeemable solely at the option of the issuer). This item includes treasury stock repurchased by the entity. Note: elements for number of nonredeemable common shares, par value and other disclosure concepts are in another section within stockholders' equity. Expansion square feet. FDX And Subsidiaries And Milwaukee Electric Tool Corporation [Member] FDX and Subsidiaries and Milwaukee Electric Tool [Member] Estimated forfeitures of stock options. Fayetteville [Member] Fayetteville, NC [Member] FDX and Subsidiaries. FDX. Fedex And Fedex Subsidiaries [Member] Fedex Corporation [Member] Fedex Corporation Subsidiaries Member [Member] Fedex Ground Package System Inc. [Member] Fedex Ground Package System Inc [Member] Fiscal 2017 [Member] Fort Worth (Dallas) [Member] Fort Worth, TX (Dallas) [Member] Fort Worth, TX [Member] Represents Frankfort, KY (Jim Beam). Frankfort, KY (Lexington) [Member] Frankfort, KY [Member] Frankfort (Lexington), KY [Member] Frankfort (Lexington) [Member] Ft. Mill (Charlotte, NC) [Member] Ft. Mill (Charlotte, NC), SC [Member] Ft. Mill. Ft. Mill, SC (Charlotte, NC) [Member] Ft. Myers, FL [Member] Ft. Myers, FL [Member] Ft. Worth (Dallas), TX [Member] Represents Ft. Worth, TX. General Electric Company [Member] General Growth Properties, Inc [Member] Getty Realty Corporation [Member] Gladstone Commercial Corporation [Member] Government National Mortgage Association [Member] Government Properties Income Trust [Member] Grace Acquisitions I [Member] Granite City, IL (St. Louis, MO) [Member] Granite City. Granite City (St. Louis, MO), IL [Member] Granite City (St. Louis, MO) [Member] Green Bay [Member] Green Bay, WI [Member] Greenwood, IN [Member] Greenwood (Indianapolis), IN [Member] Greenwood (Indianapolis) [Member] Griffin (Atlanta), GA [Member] Griffin (Atlanta) [Member] Griffin, GA (Atlanta) [Member] Griffin, GA (Atlanta) Halfmoon (Albany) [Member] Halfmoon (Albany), NY [Member] Halfmoon. Halfmoon, NY (Albany) [Member] Hanahan (Charleston) (FDX Ground) [Member] Hanahan (Charleston) (SAIC) [Member] Hanahan (Charleston), SC (FDX Ground) [Member] Hanahan (Charleston), SC (SAIC) [Member] Hanahan (FDX). Hanahan Norton. Hanahan, SC (Charleston) (FDX Ground) [Member] Hanahan, SC (Charleston) (SAIC) [Member] Houston [Member] Houston, TX [Member] Huntsville, AL [Member]. Huntsville, AL [Member] iStar Financial, Inc [Member] Imperial, PA [Member] Imperial, PA (Pittsburgh) [Member] Imperial (Pittsburgh) [Member] Imperial (Pittsburgh), PA [Member] Increase (Decrease) other assets and capitalized lease costs. Indianapolis, IN (FDX Ground) [Member] Indianapolis, IN [Member] Indianapolis, IN (Ulta) [Member] Indianapolis MSA [Member] Indianapolis, IN (FDX Ground) [Member] Industrial Building [Member] Investment Grade Tenants Or Subsidiaries [Member] Investors Real Estate Trust [Member] Jacksonville (FDX Ground) [Member] Jacksonville (FDX) [Member] Jacksonville, FL (FDX Ground) [Member] Jacksonville, FL (FDX) [Member] Jacksonville, FL (FDX) [Member] Jacksonville, FL [Member] Represents Jacksonville, FL (FDX Gr). Jacksonville. January 1, 2020 [Member] June 30 [Member] Kansas City, MO (Bunzl) [Member] Kansas City, KS (Bunzl) [Member] Kansas City (Kellogg) [Member] Kansas City, MO (Bunzl) [Member] Kansas City, MO (Kellogg) [Member] Kansas City, MO [Member] Kansas City MSA [Member] Kansas City. Kilroy Realty Corporation [Member] Lakeland, FL [Member] Lakeland, FL [Member] Lease Agreement [Member] Lease Agreement [Member] Lease Agreement [Member] Lease Agreement [Member] Lease Agreement [Member] Lease Agreement [Member] Lease Agreement [Member] Lease Agreement [Member] Lease Concentration Risk [Member] Lease expiration date description. Lease term. Lease termination income description. Lebanon (Cincinnati) [Member] Lebanon (Cincinnati), OH [Member] Lebanon, Ohio. Lebanon (Nashville) [Member] Lebanon (Nashville), TN [Member] Lebanon, OH (Cincinnati) [Member] Lebanon, TN (Nashville) [Member] Lessee concentration risk. Lexington MSA [Member] Liberty (Kansas City), MO [Member] Liberty (Kansas City) [Member] Liberty. Lindale, TX [Member] Lindale, TX (Tyler) [Member] Lindale (Tyler) [Member] Lindale (Tyler), TX [Member] Livonia Detroit MI. Livonia (Detroit) [Member] Livonia, MI (Detroit) [Member] Loan Payable Fair Value [Member] Loan Payable [Member] Loan secured with common stock. Loan secured with preferred stock. Louisville, KY [Member] Louisville [Member] Mack-Cali Realty Corporation [Member] March 31 [Member] Margin Loans [Member] Mechanicsville (Richmond) (FDX) [Member] Memphis [Member] Memphis, TN [Member] Milwaukee Electric Tool Corporation [Member] Milwaukee Electric Tool [Member] Monaca. Monaca (Pittsburgh) [Member] Monaca (Pittsburgh), PA [Member] Monroe (Cincinnati) [Member] Monroe (Cincinnati), OH [Member] Monroe (Cincinnati), OH [Member] Monroe, NC [Member] Monroe, OH (Cincinnati) [Member] Monroe. Montgomery (Chicago), IL [Member] Montgomery (Chicago) [Member] Montgomery (Chicago), IL [Member] Mortgage loan amortization period. Mortgage loan on real estate expiration period. Mortgage Loan Subsequently Fiscal Yearend [Member] Mortgage loans on real estate weighted average interest rate. Mortgage Notes Payable Fair Value [Member] Mortgage Notes Payable [Member] Mortgage Notes Payable Under Commitment [Member] Mortgages Maximum Interest Rate. Mortgages Minimum Interest Rate. Net Accrued Dividend Paid at Redemption. New Orleans MSA [Member] Newington (Hartford), CT [Member] Newington (Hartford) [Member] Newington. Number of Employees. Number of real estate properties committed to mortgage. Number of stock shares granted during period. O'Fallon member. O’Fallon (St. Louis), MO [Member] O'Fallon (St. Louis) [Member] Occupancy percentage. October 14, 2016 [Member] October 28, 2016 [Member] October 27, 2016 [Member] October 2016 [Member] Oklahoma City [Member] Oklahoma City, OK [Member] Olathe, KS (Kansas City) [Member] Olathe, KS [Member] Olathe (Kansas City), KS [Member] Olathe (Kansas City) [Member] Olive Branch, MS [Member] Olive Branch, MS (Memphis, TN) (Anda Distribution) [Member] Olive Branch, MS (Memphis, TN) (Anda) [Member] Olive Branch, MS (Memphis, TN) (Milwaukee Tool) [Member] Olive Branch, MS [Member] Olive branch. Olive Branch (Memphis, TN)(Anda Distribution) [Member] Olive Branch (Memphis, TN)(Milwaukee Tool) [Member] Olive Branch Milwaukee Tool. Omaha [Member] Omaha, NE [Member] One Property [Member] One Security [Member] Orangeburg. Orangeburg (New York) [Member] Orangeburg (New York), NY [Member] Orion, MI [Member] Orion, MI [Member] Orlando, FL [Member] Orlando MSA [Member] Orlando, FL [Member] PalmerTerraceRealtyAssociatesLLC [Member] Pennsylvania Real Estate Investment Trust [Member] Percentage of building area leased. Percentage of real estate property leased. Percentage of rental space and tenant account description. Percentage Of Un Depreciated Assets. Percentage of undepreciated assets investment marketable securities. Pittsburgh MSA [Member] Pittsburgh, PA [Member] Preferred stock accrued dividend per share. Aggregate dividends paid during the period for each share of preferred stock diluted outstanding. Property Purchase Agreement [Member] Punta Gorda, FL [Member] Punta Gorda, FL [Member] Purchase Amount For Commitments [Member] Expansion square feet. Ralcorp Holdings Inc. Square feet of real estate property leased. Reclassification of amortization of financing costs. Redemption of Series A Preferred Stock. Renatable space. Rent increased to after expansion. Rent increased to after expansion, per square foot. Rent prior to expansion. Rent prior to expansion, per square foot. Rental And Reimbursement Revenue [Member] Expected revenue as percentage of aggregate rental and reimbursement revenue in current fiscal year. Richfield (Cleveland) [Member] Richfield (Cleveland), OH [Member] Richfield. Richfield, OH (Cleveland) [Member] Richfield, OH (Cleveland) [Member] Richland (Jackson), MS [Member] Richland (Jackson) [Member] Richland. Richmond (Carrier). Richmond (FDX). Richmond (United Technologies) [Member] Represents Richmond, VA (Carrier). Represents Richmond, VA (FDX). Ridgeland (Jackson), MS [Member] Ridgeland (Jackson) [Member] Ridgeland [Member] Roanoke (CHEP) [Member] Roanoke (FDX Ground) [Member] Roanoke [Member] Roanoke, VA (CHEP) [Member] Roanoke, VA (DHL) [Member] Roanoke, VA (FDX Ground) [Member] Roanoke, VA [Member] Rockford (B/E Aerospace) [Member] Rockford, IL (B/E Aerospace) [Member] Rockford, IL [Member] Rockford, IL (Sherwin-Williams) [Member] Represents Rockford, IL (B/E Aerospace. Rockford. Rockford (Sherwin-Williams) [Member] Romulus (Detroit), MI [Member] Romulus (Detroit) [Member] Romulus. Sale of industrial building. Sauget, IL [Member] Sauget, IL (St. Louis, MO) [Member] Sauget (St. Louis, MO), IL [Member] Sauget (St. Louis, MO) [Member] Schaumburg (Chicago), IL [Member] Schaumburg (Chicago) [Member] Schaumburg. Schedule of Fixed Rate Mortgage Notes Payable [Table Text Block] Seattle/Everett MSA [Member] Security two. Select Income REIT [Member] Senior Housing Property Trust [Member] September 30 [Member] Series A Cumulative Redeemable Preferred Stock [Member] Series B Cumulative Redeemable Preferred Stock [Member] Series B Preferred Shareholders [Member] Series C Cumulative Redeemable Preferred Stock [Member] Series C Preferred Shareholders [Member] Series I Preferred Stock [Member] Series L Preferred Stock [Member] Date the equity-based award grant, in CCYY-MM-DD format. Share based compensation arrangement by share based payment award option price. Shelby County [Member] Shopping Center [Member] Somerset [Member] Somerset, NJ [Member] Spring (Houston) [Member] Spring (Houston), TX [Member] Spring, TX (Houston) [Member] St. Joseph, MO [Member] St. Joseph [Member] St. Louis, MO MSA [Member] Stewartville, MN (Rochester) [Member] Stewartville (Rochester), MN [Member] Stewartville (Rochester) [Member] Stock Option [Member] Stock Option [Member] Stock Option [Member] Stock Option [Member] Stock Option [Member] Stock Option [Member] Streetsboro (Cleveland) [Member] Streetsboro (Cleveland), OH [Member] Streetsboro, Ohio. Streetsboro, OH (Cleveland) [Member] Summit Hotel Properties, Inc [Member] Sun Communities, Inc [Member] Tampa (FDX Ground) [Member] Tampa (FDX) [Member] Tampa, FL (FDX Ground) [Member] Tampa, FL (FDX) [Member] Tampa, FL [Member]. Tampa, FL (TB Grand Prix) [Member] Tampa, FL (Tampa Bay Grand Prix) [Member] Tampa FDX Gr. Tampa (Tampa Bay Grand Prix) [Member] Term Loan One [Member] Term Loan Two [Member] Term Loans [Member] Three Properties [Member] Tolleson, AZ (Phoenix) [Member] Tolleson. Tolleson (Phoenix), AZ [Member] Tolleson (Phoenix) [Member] Topeka, KS [Member] Topeka, KS [Member] Tulsa [Member] Tulsa, OK [Member] Two Mortgages [Member] Two Mortgages [Member] Two River Community Bank [Member] 2007 Plan [Member] Two thousand seven stock option plan. Tyler MSA [Member] UMH Properties Inc [Member] ULTA, Inc. Urbandale (Des Moines), IA [Member] Urbandale (Des Moines) [Member] Urbandale. Vacant Land [Member] Vice President of Investor Relations [Member] Waco [Member] Waco, TX [Member] Weighted average lease maturity term. West Chester Twp. (Cincinnati) [Member] West Chester Twp (Cincinnati), OH [Member] West Chester Twp. West Chester Twp., OH (Cincinnati) [Member] Wheeling (Chicago), IL [Member] Wheeling (Chicago) [Member] Wheeling, IL (Chicago) [Member] Wheeling. White Bear Lake MN [Member] White Bear Lake. White Bear Lake (Minneapolis/St. Paul), MN [Member] White Bear Lake (Minneapolis/St. Paul) [Member] White Beat Lake, MN [Member] Winston-Salem [Member] Represents Winston-Salem, NC. Summary of Range Losses [Table Text Block] Stock option plan expiry date. Stock Option 1 [Member] Number of Individual Securities. Range of Loss. Securities 1 [Member] Securities 2 [Member] Gross proceeds. Weighted average loan term. Two Mortgages Loans [Member] Three Mortgages Loans [Member] Nine Mortgages Loans [Member] Percentage increase in common stock dividend. Series B redeemable preferred stock, shares. Cumulative redeemable preferred, stock dividend rate. Number of additional preferred stock shares issued during the period. Cumulative redeemable preferred, stock dividend, per share. Amended and Restated Incentive Award Plan [Member] Reduction in fixed rate mortgage note payable liability. May 1, 2017 [Member] Investment In Umh Common Shares [Member] Real Estate Investment Property, at Cost Real Estate Investment Property, Accumulated Depreciation Real Estate Investment Property, Net Assets Liabilities Stockholders' Equity Attributable to Parent Liabilities and Equity Real Estate Revenue, Net Operating Expenses [Default Label] Interest Expense, Other Long-term Debt Nonoperating Income (Expense) Net Income (Loss) Available to Common Stockholders, Basic Preferred Stock, Dividends, Per Share, Cash Paid Income (Loss) from Operations before Extraordinary Items, Per Diluted Share Rockford [Member] Other Comprehensive Income (Loss), Reclassification Adjustment from AOCI for Sale of Securities, Net of Tax Comprehensive Income (Loss), Net of Tax, Including Portion Attributable to Noncontrolling Interest Comprehensive Income (Loss), Net of Tax, Attributable to Parent Gain (Loss) on Sale of Securities, Net Gains (Losses) on Sales of Investment Real Estate Increase (Decrease) in Receivables Increase (Decrease) in Prepaid Expense and Other Assets Net Cash Provided by (Used in) Operating Activities Payments to Acquire and Develop Real Estate Payments for Capital Improvements Payments for Deposits on Real Estate Acquisitions Net Cash Provided by (Used in) Investing Activities Payments for Mortgage Deposits Payments of Financing Costs Payments of Ordinary Dividends, Preferred Stock and Preference Stock Payments of Dividends Net Cash Provided by (Used in) Financing Activities Cash and Cash Equivalents, Period Increase (Decrease) Investments in Debt and Marketable Equity Securities (and Certain Trading Assets) Disclosure [Text Block] BusinessAcquisitionsProFormaRealEstateTaxes BusinessAcquisitionsProFormaOperatingExpenses BusinessAcquisitionsProFormaDepreciationAndAmortization BusinessAcquisitionsProFormaIncomeLossFromOperations BusinessAcquisitionsProFormaGainOnSaleOfRealEstateInvestment BusinessAcquisitionsProFormaNetLoss CumulativeRedeemablePreferredStockDividendRate