SUBSEQUENT EVENTS (Details)				12 Months Ended
	May 06, 2016 USD ($)	May 03, 2016 USD ($)	May 02, 2016 USD ($) property	Apr. 30, 2016 property	Jun. 02, 2016 $ / shares
Common Shares and Limited Partnership Units [Member]
Subsequent Event [Line Items]
Record Date				Jun. 15, 2016
Payment Date				Jul. 01, 2012
Series A Preferred Stock [Member]
Subsequent Event [Line Items]
Record Date				Jun. 15, 2016
Payment Date				Jun. 30, 2016
Series B Preferred Stock [Member]
Subsequent Event [Line Items]
Record Date				Jun. 15, 2016
Payment Date				Jun. 30, 2016
Multi-Family Residential [Member]
Subsequent Event [Line Items]
Number of properties sold | property				8
Unimproved Land [Member]
Subsequent Event [Line Items]
Number of properties sold | property				3
Subsequent Event [Member] | Common Shares and Limited Partnership Units [Member]
Subsequent Event [Line Items]
Quarterly amount per share or unit (in dollars per share) | $ / shares					$ 0.1300
Subsequent Event [Member] | Series A Preferred Stock [Member]
Subsequent Event [Line Items]
Quarterly amount per share or unit (in dollars per share) | $ / shares					0.5156
Subsequent Event [Member] | Series B Preferred Stock [Member]
Subsequent Event [Line Items]
Quarterly amount per share or unit (in dollars per share) | $ / shares					$ 0.4968
Subsequent Event [Member] | Unimproved Land [Member] | Grand Chute, WI
Subsequent Event [Line Items]
Sales price of office properties | $	$ 250,000
Subsequent Event [Member] | Senior Housing properties [Member]
Subsequent Event [Line Items]
Sales price of office properties | $			$ 43,500,000
Number of properties sold | property			8
Subsequent Event [Member] | Industrial Property, Fargo ND
Subsequent Event [Line Items]
Sales price of office properties | $		$ 13,400,000