Class Of Stock [Axis] Series C Preferred Stock [Member] Real Estate Property Ownership [Axis] Kansas City, MO (Kellogg) [Member] Orangeburg NY [Member] Ridgeland (Jackson), MS [Member] Urbandale (Des Moines), IA [Member] Rockford, IL (Sherwin-Williams Co.) [Member] Roanoke, VA (FDX Ground) [Member] Option Indexed to Issuer's Equity, Type [Axis] Stock Option [Member] Real Estate, Type of Property [Axis] Industrial Buildings [Member] FedEx Corporation [Member] Amazon.com Services, Inc [Member] Fedex Ground Package System Inc. [Member] Series C Cumulative Redeemable Preferred Stock [Member] Series A Cumulative Redeemable Preferred Stock [Member] Series B Cumulative Redeemable Preferred Stock [Member] Fedex And Fedex Subsidiaries [Member] Fedex Corporation Subsidiaries Member [Member] Concentration Risk Type [Axis] Rental And Reimbursement Revenue [Member] Property, Plant and Equipment, Type [Axis] Land [Member] Buildings [Member] In-Place Leases [Member] Kansas City, MO and Orangeburg, NY [Member] Real Estate Held for Sale [Member] Four Properties [Member] Lease Arrangement, Type [Axis] Four Lease [Member] Stock Option One [Member] Stock Option Two [Member] Shaw Industries, Inc [Member] B. Braun Medical Inc. [Member] White Bear Lake, MN [Member] Kansas City, MO (Kellogg) and Orangeburg [Member] Series A Preferred Stock [Member] Series B Preferred Stock [Member] Colorado Springs, CO [Member] Ft. Myers [Member] Buildings [Member] Business Acquisition [Axis] UMH Properties, Inc [Member] Financial Instrument [Axis] Common Stock [Member] Common and Preferred Stock [Member] Equity Components [Axis] Preferred Stock [Member] Debt Security Category [Axis] Securities One [Member] Securities Two [Member] Securities Three [Member] Securities Four [Member] Range [Axis] Minimum [Member] Maximum [Member] Two Mortgages Loans [Member] Two Mortgages Loans [Member] One Mortgages Loans [Member] Five Mortgages Loans [Member] Short-term Debt, Type [Axis] Line of Credit [Member] Plan Name [Axis] Dividend Reinvestment and Stock Purchase Plan [Member] Title of Individual [Axis] Board of Directors [Member] Report Date [Axis] July 2, 2018 [Member] Preferred Stock ATM Program [Member] Debt Instrument [Axis] Mortgage Notes Payable Fair Value [Member] Measurement Frequency [Axis] Fair Value Measurements [Member] Fair Value, Hierarchy [Axis] Level 1 [Member] Level 2 [Member] Level 3 [Member] Mortgage Backed Securities [Member] Property Purchase Agreement [Member] Industrial Building [Member] Two Property [Member] Subsequent Event Type [Axis] Subsequent Event [Member] Related Party [Axis] Common Shareholders [Member ] Series C Preferred Shareholders [Member] July 18, 2018 [Member] Preferred Stock ATM Program [Member] Four Real Estate Propeties [Member] Two Properties [Member] 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 Real Estate Held for Sale Cash and Cash Equivalents Securities Available for Sale at Fair Value Tenant and Other Receivables Deferred Rent Receivable Prepaid Expenses Intangible Assets, net of Accumulated Amortization of $13,244,102 and $13,404,318, respectively Capitalized Lease Costs, net of Accumulated Amortization of $3,050,738 and $3,393,187, respectively Financing Costs, net of Accumulated Amortization of $901,240 and $619,555, 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 Total Liabilities COMMITMENTS AND CONTINGENCIES Shareholders' Equity: 6.125% Series C Cumulative Redeemable Preferred Stock, $0.01 Par Value Per Share: 12,400,000 Shares Authorized as of June 30, 2018 and September 30, 2017; 11,099,461 and 9,839,445 Shares Issued and Outstanding as of June 30, 2018 and September 30, 2017, respectively Common Stock, $0.01 Par Value Per Share: 192,039,750 Shares Authorized as of June 30, 2018 and September 30, 2017; 80,137,070 and 75,630,521 Shares Issued and Outstanding as of June 30, 2018 and September 30, 2017, respectively Excess Stock, $0.01 Par Value Per Share: 200,000,000 Shares Authorized as of June 30, 2018 and September 30, 2017; No Shares Issued or Outstanding as of June 30, 2018 and September 30, 2017 Additional Paid-In Capital Accumulated Other Comprehensive Income (Loss) Undistributed Income Total Shareholders' Equity TOTAL LIABILITIES & SHAREHOLDERS' EQUITY Accumulated amortization of intangible assets Accumulated amortization of lease costs 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 Lease Termination Income 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) INCOME FROM CONTINUING OPERATIONS Gain on Sale of Real Estate Investments NET INCOME Less: Preferred Dividends Less: Redemption of Preferred Stock NET INCOME ATTRIBUTABLE TO COMMON SHAREHOLDERS BASIC INCOME - PER SHARE Net Income Less: Preferred Dividends Less: Redemption of Preferred Stock Net Income Attributable to Common Shareholders - Basic DILUTED INCOME - PER SHARE Net Income Less: Preferred Dividends Less: Redemption of Preferred Stock 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 (Losses) Arising During the Period Reclassification Adjustment for Net Gains Realized in Income TOTAL COMPREHENSIVE INCOME COMPREHENSIVE INCOME ATTRIBUTABLE TO COMMON SHAREHOLDERS Statement of Cash Flows [Abstract] CASH FLOWS FROM OPERATING ACTIVITIES Noncash Items Included in Net Income: Depreciation & Amortization Deferred Straight Line Rent Stock Compensation Expense Gain on Sale of Securities Transactions (Gain) / Loss on Sale of Real Estate Investments Changes In: Tenant & Other Receivables Prepaid Expenses Other Assets & Capitalized Lease Costs Accounts Payable, Accrued Expenses & Other Liabilities NET CASH PROVIDED BY OPERATING ACTIVITIES CASH FLOWS FROM INVESTING ACTIVITIES Purchase of Real Estate & Intangible Assets Capital Improvements Proceeds from Sale of Real Estate Investments 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 Draws on 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 7.625% Series A Preferred Stock Redemption of 7.875% Series B Preferred Stock Proceeds from Underwritten Public Offering of Preferred Stock, net of offering costs Proceeds from At-The-Market Preferred Equity Program, 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 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 Preferred stock dividend rate 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 Summary of Stock Options Outstanding Schedule of Stock Options, Valuation Assumptions Schedule of Properties Acquired During Period Accounted for Asset Acquisitions Summary of Consolidated Statements of Income for Properties Acquired Summary of Income or Operation Statements Schedule of Pro Forma Information Schedule of Temporary Impaired Securities Summary of Range of Losses Summary of Fixed Rate Mortgage Notes Payable Summary of Fair Value of Financial Assets Number of real estate properties owned Total square foot of property Percentage of properties occupied Weighted average lease maturity Annualized average base rent per square foot REIT investment securities, description Total gross real estate investments Marketable REIT securities investments Percentage of undepreciated assets Value of property sold Proceeds from sale of property Gain on real estate properties Percentage of gain on properties Net gain on historic cost Percentage of net gain over the historic cost basis Potential lease termination income Percentage of weighted average lease termination income Stock based compensation expense Weighted average fair value of stock option Number Restricted stock shares granted Number of stock option exercised Weighted average exercise price per share Total proceeds Stock option shares available for grant Option to purchase shares outstanding Aggregate intrinsic value of options Date of Grant Number of Employees Number of Shares Option Price Expiration Date 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 Restructuring Type [Axis] Purchase of industrial building Area of property 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 Mortgage loan period Transaction costs 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 Lease termination income Sale of industrial building Square feet of real estate property leased Percentage of real estate property leased Percentage of rental space and tenant account, description Percentage of aggregate rental and reimbursement revenue Held marketable securities Purchase price allocation of properties acquired Rental Revenue Net Income Attributable to Common Shareholders Rental and Reimbursement Revenue Real Estate Taxes Operating Expenses Depreciation & Amortization Interest Expense, including Amortization of Financing Costs Income from Operations Gain (Loss) on Sale of Real Estate Investments Net Income 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] Debt Securities, Available-for-sale [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 Dividend income on investment in securities Purchase of securities available for sale UMH common shares purchased during the quarter Cost of securities purchased Dividend reinvestment and stock purchase plan cost, per share 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 Amortization of financing costs Fixed rate mortgage notes payable, description Fixed rate mortgage notes payable Annual interest rate Weighted average interest rate percentage Notes payable maturity period Mortgage loan amortizing over period Proceeds from fixed rate mortgage notes payable Repayment of mortgage payable Total availability of unsecured credit facility Line of credit amount Drawn down margin loan Debt maturity date Line of credit facility interest rate terms Line of credit facility related to accordion feature Total potential available under unsecured line of credit Maximum borrowing percentage of marketable securities Margin loan bearing interest rate 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 Excess Stock, shares issued Excess Stock, shares outstanding Percentage increase in common stock dividend Dividend declared per share Common stock dividend, description Increase in dividend period, description Dividend increase percentage Annualized dividend rate per share price Period of maintained or increased its cash dividend Cash raised from issuance of common stock under DRIP Amount of dividend reinvested Common stock issued under plan Cash dividends paid Share Repurchase Program authorizes amount Accrued dividend Annual rate of dividends cumulative and payable Preferred stock redemption price Maximum proceeds from issuance of sale of equity Number of preferred stock shares sold Weighted average exercise price per share Net proceeds from offering 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] Fair Value Hierarchy and NAV [Axis] Cash paid for interest Contingencies and Commitments [Table] Contingencies and Commitments [Line Items] Legal Entity [Axis] Expansions Weighted average lease maturity term Aggregate purchase price of industrial properties Mortgage loans amortization period Mortgage loans committed on real estate, carrying amount of mortgage Weighted average fixed interest rate, percentage Expansion costs Increase in annualized rent Lease extension term from the date of completion Subsequent Event [Table] Subsequent Event [Line Items] Dividend declaration date Dividends payable, date to be paid Dividend payable date of record Preferred stock dividend rate, percentage Amazon.com Services, Inc [Member] Annualized average base rent per square foot. Acres of property. B. Braun Medical Inc [Member] Basic and Diluted Net Income per Share Attributable to Common Shareholders. New Buildings [Member] Amount of acquisition cost of a business combination allocated to buildings included in real estate. 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 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. The pro forma loss 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. 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. Business Acquisitions Purchase Price Allocation Of Properties Acquired. Colorado Springs, CO [Member] Cost of building expansion. Dividend rate in percentage of preferred stock. 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. Estimated forfeitures of stock options. 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] Four Lease [Member] Four Properties [Member] Ft. Myers, FL [Member] The net gain (loss) resulting from sales and other disposals of real estate owned for investment purposes. In-Place Leases [Member] Increase (Decrease) other assets and capitalized lease costs. Industrial Buildings [Member] Kansas City, MO (Kellogg) and Orangeburg [Member] Kansas City, MO and Orangeburg, NY [Member] Kansas City, MO [Member] Lease Expiration Date Description. Lease term. Represents a settlement with former tenants for the early termination of a lease. Mortgage loan on real estate expiration period. Mortgage loan period. Net gain on historic cost undepreciated basis. Net Income Attributable to Common Shareholders. Number of Employees. Orangeburg NY [Member] Percentage of building area leased. Percentage of gain on properties. Percentage of net gain over the historic cost basis. Percentage of real estate property leased. Percentage of rental space and tenant account description. Percentage of undepreciated assets. Percentage of weighted average lease termination income. Potential lease termination income. Aggregate dividends paid during the period for each share of preferred stock diluted outstanding. Proceeds from market preferred equity program. Expansion square feet. Real Estate Held for Sale [Member] Square feet of real estate property leased. Redemption of Series A Preferred Stock. 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] Rental Revenue. Expected revenue as percentage of aggregate rental and reimbursement revenue in current fiscal year. Ridgeland [Member] Roanoke [Member] Rockford, IL (Sherwin-Williams Co.) [Member] Sale of industrial building. Series A Cumulative Redeemable Preferred Stock [Member] Series B Cumulative Redeemable Preferred Stock [Member] Series C Cumulative Redeemable 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. Shaw Industries, Inc [Member] Summary of Consolidated Statements of Income for Properties Acquired [Table Text Block] Summary of Range of Losses [Table Text Block] Fiscal Year 2018 [Member] Fiscal Year 2017 [Member] Urbandale (Des Moines), IA [Member] White Bear Lake MN [Member] Redemption of 7.875% Series B Preferred Stock. Reimbursement Revenue. Total income. UMH Properties Inc [Member] Common and Preferred Stock [Member] Percentage of undepreciated assets investment marketable securities. Common stock shares purchases. Dividend reinvestment and stock purchase plan cost, per share. Available for sale securities, Shares. Dividend rate of preferred stock held as security for loan. Securities 1 [Member] Securities 2 [Member] Securities Three [Member] Securities Four [Member] Number of individual securities. Available for sale securities range of loss in percentage. Two Mortgages Loans [Member] Two Mortgages Loans [Member] One Mortgages Loans [Member] Five Mortgages Loans [Member] Fixed rate mortgage notes payable, description. Mortgage loan amortizing over period. Maximum borrowing percentage of marketable securities. Dividend Reinvestment and Stock Purchase Plan [Member] Board of Directors [Member] July 2, 2018 [Member] Preferred Stock ATM Program [Member] Percentage increase in common stock dividend. Common stock dividend, description. Dividend increase percentage. Annualized dividend rate per share price. Represent the period of cash dividend maintained. Cash raised from issuance of common stock under DRIP. Amount of dividend reinvested. Net proceeds from offering. Mortgage Notes Payable Fair Value [Member] Contingencies and Commitments. Contingencies and Commitments. Property Purchase Agreement [Member] Two Property [Member] Property One [Member] Property Two [Member] Weighted average lease maturity term. Business acquisition, purchase price allocation, property, plant and equipments. Mortgage loan amortization period. Fixed interest rate, percentage. Lease extension term from the date of completion. Common Shareholders [Member ] Series C Preferred Shareholders [Member] Stock Option One [Member] Stock Option Two [Member] July 18, 2018 [Member] One Property [Member] Preferred Stock ATM Program [Member] Increase in dividend period, description. Ft. Myers, FL [Member] Four Real Estate Propeties [Member] Two Properties [Member] BuildingsMember TwoMortgagesLoansTwoMember PreferredStockATMProgramOneMember 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 RealEstateRevenuesNet Operating Expenses [Default Label] Interest Expense, Other Long-term Debt Nonoperating Income (Expense) Net Income (Loss) Attributable to Parent Net Income (Loss) Available to Common Stockholders, Basic Preferred Stock, Dividends, Per Share, Cash Paid Income (Loss) from Extraordinary Items, Net of Tax, Per Basic Share Income (Loss) from Operations before Extraordinary Items, Per Diluted Share Granite City [Member] Income (Loss) from Extraordinary Items, Net of Tax, Per Diluted Share 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 Straight Line Rent GainsLossesOnSalesOfInvestmentRealEstate1 Increase (Decrease) in Receivables Increase (Decrease) in Prepaid Expense 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 RedemptionOfSeriesPreferredStock 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] Lessee, Leases [Policy Text Block] RentalRevenue Business Acquisitions Pro Forma Real Estate Taxes Business Acquisitions Pro Forma Operating Expenses Business Acquisitions Pro Forma Depreciation And Amortization Business Acquisitions Pro Forma Income Loss From Operations BusinessAcquisitionsProFormaLossOnSaleOfRealEstateInvestment BusinessAcquisitionsProFormaNetLoss Business Acquisition, Pro Forma Net Income (Loss) Available-for-sale Securities, Continuous Unrealized Loss Position, Less than 12 Months, Accumulated Loss Available-for-sale Securities, Continuous Unrealized Loss Position, Accumulated Loss Accumulated Amortization, Debt Issuance Costs, Current Sale of Stock, Price Per Share