Federal Income Taxes (Details) (USD $)	3 Months Ended								12 Months Ended
Federal Income Taxes (Details) (USD $)	Dec. 31, 2014	Sep. 30, 2014	Jun. 30, 2014	Mar. 31, 2014	Dec. 31, 2013	Sep. 30, 2013	Jun. 30, 2013	Mar. 31, 2013	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Reconciliation of U.S. GAAP net income to taxable income
U.S. GAAP net income	$ 1,563,618us-gaap_NetIncomeLoss	$ 629,271us-gaap_NetIncomeLoss	$ 1,476,725us-gaap_NetIncomeLoss	$ 568,189us-gaap_NetIncomeLoss	$ (733,004)us-gaap_NetIncomeLoss	$ 800,877us-gaap_NetIncomeLoss	$ 1,619,439us-gaap_NetIncomeLoss	$ 4,149,511us-gaap_NetIncomeLoss	$ 4,237,803us-gaap_NetIncomeLoss	$ 5,836,823us-gaap_NetIncomeLoss	$ 6,474,057us-gaap_NetIncomeLoss
Add: U.S. GAAP net loss of taxable REIT subsidiary included above									3,946,571umh_NetLossOfTaxableReitSubsidiary	2,746,526umh_NetLossOfTaxableReitSubsidiary	3,081,837umh_NetLossOfTaxableReitSubsidiary
U.S. GAAP net income from REIT operations									8,184,374umh_NetIncomeFromReitOperations	8,583,349umh_NetIncomeFromReitOperations	9,555,894umh_NetIncomeFromReitOperations
Stock option expense									922,944	850,349	573,244
Acquisition costs and other book / tax differences, net									(1,238,794)	351,413	(344,027)
Taxable income before adjustments									7,868,524umh_TaxableIncomeBeforeAdjustments	9,785,111umh_TaxableIncomeBeforeAdjustments	9,785,111umh_TaxableIncomeBeforeAdjustments
Less: Capital gains									(1,514,518)umh_CapitalGains	(3,630,548)umh_CapitalGains	(4,146,773)umh_CapitalGains
Adjusted taxable income subject to 90% dividend requirement									$ 6,354,006	$ 6,154,563	$ 5,638,338