SUBSEQUENT EVENTS (Details)		6 Months Ended
	Nov. 30, 2015 ft²	Oct. 31, 2015	Dec. 03, 2015 $ / shares
Common Shares and Limited Partnership Units [Member]
Subsequent Event [Line Items]
Record date		Jan. 04, 2016
Payment date		Jan. 15, 2016
Series A Preferred Stock [Member]
Subsequent Event [Line Items]
Record date		Dec. 15, 2015
Payment date		Dec. 31, 2015
Series B Preferred Stock [Member]
Subsequent Event [Line Items]
Record date		Dec. 15, 2015
Payment date		Dec. 31, 2015
Subsequent Event [Member] | Roseville 3075 Long Lake Road Property [Member]
Subsequent Event [Line Items]
Lease term	89 months
Area of leased property | ft²	143,956
Percentage of rentable square footage of industrial segment	11.80%
Subsequent Event [Member] | Common Shares and Limited Partnership Units [Member]
Subsequent Event [Line Items]
Quarterly amount per share or unit (in dollars per share)			$ 0.1300
Subsequent Event [Member] | Series A Preferred Stock [Member]
Subsequent Event [Line Items]
Quarterly amount per share or unit (in dollars per share)			0.5156
Subsequent Event [Member] | Series B Preferred Stock [Member]
Subsequent Event [Line Items]
Quarterly amount per share or unit (in dollars per share)			$ 0.4968