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GAIN ON SETTLEMENT OF DEBT (Details) (USD $)
 0 Months Ended 1 Months Ended 12 Months Ended 1 Months Ended
Feb. 11, 2011
Jun. 30, 2011
Dec. 31, 2013
Dec. 31, 2012
Dec. 31, 2011
Apr. 30, 2013
Unconsolidated JV in Plano, Texas
Jun. 30, 2011
Mortgage
GAIN ON SETTLEMENT OF DEBT              
Principal balance of loan paid off             $ 8,893,000
Payment of debt 7,700,000   4,708,000 32,422,000 15,302,000   7,634,000
Gain on settlement of debt, net of write off of deferred mortgage costs         1,240,000   1,240,000
Write off of remaining balance of deferred mortgage costs             19,000
Impairment charge   0 62,000        
Gain on sale of equity interest in the joint venture           $ 1,898,000