REAL ESTATE PROPERTIES 4 (Details) (USD $)	12 Months Ended
	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
State or Province [Line Items]
Leases terms minimum (in years)	40 years
Leases terms maximum (in years)	50 years
Renewal period option minimum (in years)	15 years
Renewal period option maximum (in years)	35 years
Total ground lease expenditures for continuing and discontinued operations	$ 745,000	$ 740,000	$ 733,000
Payment increase interval minimum (in years)	3 years
Payment increase interval maximum (in years)	10 years
Future Total Minimum Ground Lease Payments [Abstract]
2015	747,000
2016	747,000
2017	747,000
2018	747,000
2019	747,000
Thereafter	11,815,000
Total minimum payments	$ 15,550,000
FLORIDA [Member]
State or Province [Line Items]
Number of properties subject to ground leases	2
TEXAS [Member]
State or Province [Line Items]
Number of properties subject to ground leases	2
ARIZONA [Member]
State or Province [Line Items]
Number of properties subject to ground leases	1