Line of credit accordion feature.

No definition available.

Name:	UMH_LineOfCreditAccordionFeature
Namespace Prefix:	UMH_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

Weighted average loan maturity on mortgages.

+ References

No definition available.

+ Details

Name:	UMH_WeightedAverageLoanMaturityOnMortgages
Namespace Prefix:	UMH_
Data Type:	xbrli:durationItemType
Balance Type:	na
Period Type:	duration

- Definition

The carrying value as of the balance sheet date of the current and noncurrent portions of long-term obligations drawn from a line of credit, which is a bank's commitment to make loans up to a specific amount. Examples of items that might be included in the application of this element may consist of letters of credit, standby letters of credit, and revolving credit arrangements, under which borrowings can be made up to a maximum amount as of any point in time conditional on satisfaction of specified terms before, as of and after the date of drawdowns on the line. Includes short-term obligations that would normally be classified as current liabilities but for which (a) postbalance sheet date issuance of a long term obligation to refinance the short term obligation on a long term basis, or (b) the enterprise has entered into a financing agreement that clearly permits the enterprise to refinance the short-term obligation on a long term basis and the following conditions are met (1) the agreement does not expire within 1 year and is not cancelable by the lender except for violation of an objectively determinable provision, (2) no violation exists at the BS date, and (3) the lender has entered into the financing agreement is expected to be financially capable of honoring the agreement.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02(22))
-URI http://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682

Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 942
-SubTopic 210
-Section S99
-Paragraph 1
-Subparagraph (SX 210.9-03(16))
-URI http://asc.fasb.org/extlink&oid=120398452&loc=d3e534808-122878

Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 944
-SubTopic 210
-Section S99
-Paragraph 1
-Subparagraph (SX 210.7-03(16))
-URI http://asc.fasb.org/extlink&oid=120400017&loc=d3e572229-122910

+ Details

Name:	us-gaap_LineOfCredit
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

Description of the credit facility's borrowing capacity including discussion of how the borrowing capacity is determined (for example, borrowing capacity based on the amount of current assets).

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02(22)(b))
-URI http://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682

Reference 2: http://www.xbrl.org/2009/role/commonPracticeRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02(19)(b))
-URI http://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682

+ Details

Name:	us-gaap_LineOfCreditFacilityBorrowingCapacityDescription
Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

- Definition

The effective interest rate during the reporting period.

+ References

+ Details

Name:	us-gaap_LineOfCreditFacilityInterestRateDuringPeriod
Namespace Prefix:	us-gaap_
Data Type:	dtr-types:percentItemType
Balance Type:	na
Period Type:	duration

- Definition

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

+ References

No definition available.

+ Details

Name:	us-gaap_LineOfCreditFacilityLineItems
Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

- Definition

Maximum borrowing capacity under the credit facility without consideration of any current restrictions on the amount that could be borrowed or the amounts currently outstanding under the facility.

+ References

+ Details

Name:	us-gaap_LineOfCreditFacilityMaximumBorrowingCapacity
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

Amount of borrowing capacity currently available under the credit facility (current borrowing capacity less the amount of borrowings outstanding).

+ References

+ Details

Name:	us-gaap_LineOfCreditFacilityRemainingBorrowingCapacity
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Details

Name:	us-gaap_DebtInstrumentAxis=UMH_UnsecuredLineofCreditMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_CreditFacilityAxis=UMH_UnsecuredRevolvingCreditFacilityMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

LOANS AND MORTGAGES PAYABLE (Details Narrative) - USD ($) $ in Millions		3 Months Ended	12 Months Ended
	Nov. 29, 2018	Mar. 31, 2021	Dec. 31, 2020
Line of Credit Facility [Line Items]
Line of credit, outstanding		$ 45.0
Weighted average loan maturity on mortgages		5 years 9 months 18 days	6 years
Unsecured Line of Credit [Member]
Line of Credit Facility [Line Items]
Line of credit interest rate		1.72%	1.65%
Unsecured Revolving Credit Facility [Member]
Line of Credit Facility [Line Items]
Borrowing capacity, description	The Facility is syndicated with two banks led by BMO Capital Markets Corp. (“BMO”), as sole lead arranger and sole book runner, with Bank of Montreal as administrative agent, and includes JPMorgan Chase Bank, N.A. (“J.P. Morgan”) as the sole syndication agent. The Amendment provided for an increase from $50 million in available borrowings to $75 million in available borrowings with a $50 million accordion feature, bringing the total potential availability up to $125 million, subject to certain conditions including obtaining commitments from additional lenders. The Amendment also extended the maturity date of the Facility from March 27, 2020 to November 29, 2022, with a one-year extension available at the Company’s option, subject to certain conditions including payment of an extension fee. Availability under the Facility is limited to 60% of the value of the unencumbered communities which the Company has placed in the Facility’s unencumbered asset pool (“Borrowing Base”). The Amendment increased the value of the Borrowing Base communities by reducing the capitalization rate applied to the Net Operating Income (“NOI”) generated by the communities in the Borrowing Base from 7.5% to 7.0%. On February 5, 2021, the Company entered into a Second Amendment to Amended and Restated Credit Agreement with BMO to further reduce the capitalization rate from 7.0% to 6.5%.
Line of credit accordion feature	$ 50.0
Line of Credit Facility, Remaining Borrowing Capacity	75.0
Line of credit facility, maximum borrowing capacity	$ 125.0