Annual report pursuant to Section 13 and 15(d)

INVESTMENTS IN REAL ESTATE, NET OF ACCUMULATED DEPRECIATION - Investments in Other Real Estate 1 (Details)

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INVESTMENTS IN REAL ESTATE, NET OF ACCUMULATED DEPRECIATION - Investments in Other Real Estate 1 (Details) - USD ($)
$ in Thousands
Dec. 31, 2016
Dec. 31, 2015
Dec. 31, 2014
Dec. 31, 2013
Investment [Line Items]        
Initial cost - land $ 84,981      
Initial cost - building and improvements 132,506      
Initial cost - furniture, fixtures and equipment 16,361      
Initial cost - construction In-progress 5,590      
Costs Capitalized Subsequent to Acquisition 42,909      
Gross Carrying Amount - land and improvements 84,319      
Gross Carrying Amount - buildings and improvements 144,690      
Gross Carrying Amount - furniture, fixtures and equipment 49,976      
Gross Carrying Amount - Construction in-progress 3,362      
Gross Carrying Amount - total 282,347 $ 276,119 $ 263,103 $ 250,208
Accumulated depreciation (64,736) $ (48,212) $ (23,820) $ 0
Net Book Value 217,611      
Managed Properties        
Investment [Line Items]        
Initial cost - land 0      
Initial cost - building and improvements 0      
Initial cost - furniture, fixtures and equipment 59      
Initial cost - construction In-progress 0      
Costs Capitalized Subsequent to Acquisition 1,639      
Gross Carrying Amount - land and improvements 0      
Gross Carrying Amount - buildings and improvements 0      
Gross Carrying Amount - furniture, fixtures and equipment 1,698      
Gross Carrying Amount - Construction in-progress 0      
Gross Carrying Amount - total 1,698      
Accumulated depreciation (324)      
Net Book Value 1,374      
Managed Properties | El Cariso | Sylmar, CA        
Investment [Line Items]        
Initial cost - land 0      
Initial cost - building and improvements 0      
Initial cost - furniture, fixtures and equipment 0      
Initial cost - construction In-progress 0      
Costs Capitalized Subsequent to Acquisition 32      
Gross Carrying Amount - land and improvements 0      
Gross Carrying Amount - buildings and improvements 0      
Gross Carrying Amount - furniture, fixtures and equipment 32      
Gross Carrying Amount - Construction in-progress 0      
Gross Carrying Amount - total 32      
Accumulated depreciation (6)      
Net Book Value 26      
Managed Properties | Fullerton | Fullerton, CA        
Investment [Line Items]        
Initial cost - land 0      
Initial cost - building and improvements 0      
Initial cost - furniture, fixtures and equipment 0      
Initial cost - construction In-progress 0      
Costs Capitalized Subsequent to Acquisition 373      
Gross Carrying Amount - land and improvements 0      
Gross Carrying Amount - buildings and improvements 0      
Gross Carrying Amount - furniture, fixtures and equipment 373      
Gross Carrying Amount - Construction in-progress 0      
Gross Carrying Amount - total 373      
Accumulated depreciation (103)      
Net Book Value 270      
Managed Properties | John A White | Atlanta, GA        
Investment [Line Items]        
Initial cost - land 0      
Initial cost - building and improvements 0      
Initial cost - furniture, fixtures and equipment 0      
Initial cost - construction In-progress 0      
Costs Capitalized Subsequent to Acquisition 0      
Gross Carrying Amount - land and improvements 0      
Gross Carrying Amount - buildings and improvements 0      
Gross Carrying Amount - furniture, fixtures and equipment 0      
Gross Carrying Amount - Construction in-progress 0      
Gross Carrying Amount - total 0      
Accumulated depreciation 0      
Net Book Value 0      
Managed Properties | Lomas Santa Fe | Solana Beach, CA        
Investment [Line Items]        
Initial cost - land 0      
Initial cost - building and improvements 0      
Initial cost - furniture, fixtures and equipment 8      
Initial cost - construction In-progress 0      
Costs Capitalized Subsequent to Acquisition 500      
Gross Carrying Amount - land and improvements 0      
Gross Carrying Amount - buildings and improvements 0      
Gross Carrying Amount - furniture, fixtures and equipment 508      
Gross Carrying Amount - Construction in-progress 0      
Gross Carrying Amount - total 508      
Accumulated depreciation (93)      
Net Book Value 415      
Managed Properties | Paradise Knolls | Riverdale, CA        
Investment [Line Items]        
Initial cost - land 0      
Initial cost - building and improvements 0      
Initial cost - furniture, fixtures and equipment 46      
Initial cost - construction In-progress 0      
Costs Capitalized Subsequent to Acquisition 0      
Gross Carrying Amount - land and improvements 0      
Gross Carrying Amount - buildings and improvements 0      
Gross Carrying Amount - furniture, fixtures and equipment 46      
Gross Carrying Amount - Construction in-progress 0      
Gross Carrying Amount - total 46      
Accumulated depreciation (46)      
Net Book Value 0      
Managed Properties | Santa Clara | Santa Clara, CA        
Investment [Line Items]        
Initial cost - land 0      
Initial cost - building and improvements 0      
Initial cost - furniture, fixtures and equipment 0      
Initial cost - construction In-progress 0      
Costs Capitalized Subsequent to Acquisition 0      
Gross Carrying Amount - land and improvements 0      
Gross Carrying Amount - buildings and improvements 0      
Gross Carrying Amount - furniture, fixtures and equipment 0      
Gross Carrying Amount - Construction in-progress 0      
Gross Carrying Amount - total 0      
Accumulated depreciation 0      
Net Book Value 0      
Managed Properties | Tustin Ranch | Tustin, CA        
Investment [Line Items]        
Initial cost - land 0      
Initial cost - building and improvements 0      
Initial cost - furniture, fixtures and equipment 0      
Initial cost - construction In-progress 0      
Costs Capitalized Subsequent to Acquisition 0      
Gross Carrying Amount - land and improvements 0      
Gross Carrying Amount - buildings and improvements 0      
Gross Carrying Amount - furniture, fixtures and equipment 0      
Gross Carrying Amount - Construction in-progress 0      
Gross Carrying Amount - total 0      
Accumulated depreciation 0      
Net Book Value 0      
Managed Properties | Westchester | Los Angeles, CA        
Investment [Line Items]        
Initial cost - land 0      
Initial cost - building and improvements 0      
Initial cost - furniture, fixtures and equipment 0      
Initial cost - construction In-progress 0      
Costs Capitalized Subsequent to Acquisition 53      
Gross Carrying Amount - land and improvements 0      
Gross Carrying Amount - buildings and improvements 0      
Gross Carrying Amount - furniture, fixtures and equipment 53      
Gross Carrying Amount - Construction in-progress 0      
Gross Carrying Amount - total 53      
Accumulated depreciation (10)      
Net Book Value 43      
Managed Properties | Woodlands | Wayne, MI        
Investment [Line Items]        
Initial cost - land 0      
Initial cost - building and improvements 0      
Initial cost - furniture, fixtures and equipment 0      
Initial cost - construction In-progress 0      
Costs Capitalized Subsequent to Acquisition 8      
Gross Carrying Amount - land and improvements 0      
Gross Carrying Amount - buildings and improvements 0      
Gross Carrying Amount - furniture, fixtures and equipment 8      
Gross Carrying Amount - Construction in-progress 0      
Gross Carrying Amount - total 8      
Accumulated depreciation (2)      
Net Book Value 6      
Managed Properties | Yorba Linda | Yorba Linda, CA        
Investment [Line Items]        
Initial cost - land 0      
Initial cost - building and improvements 0      
Initial cost - furniture, fixtures and equipment 5      
Initial cost - construction In-progress 0      
Costs Capitalized Subsequent to Acquisition 673      
Gross Carrying Amount - land and improvements 0      
Gross Carrying Amount - buildings and improvements 0      
Gross Carrying Amount - furniture, fixtures and equipment 678      
Gross Carrying Amount - Construction in-progress 0      
Gross Carrying Amount - total 678      
Accumulated depreciation (64)      
Net Book Value 614      
Total Leased Properties (D)        
Investment [Line Items]        
Initial cost - land 0      
Initial cost - building and improvements 46,067      
Initial cost - furniture, fixtures and equipment 8,067      
Initial cost - construction In-progress 1,228      
Costs Capitalized Subsequent to Acquisition 20,119      
Gross Carrying Amount - land and improvements 0      
Gross Carrying Amount - buildings and improvements 48,768      
Gross Carrying Amount - furniture, fixtures and equipment 25,976      
Gross Carrying Amount - Construction in-progress 737      
Gross Carrying Amount - total 75,481      
Accumulated depreciation (29,823)      
Net Book Value 45,658      
Corporate        
Investment [Line Items]        
Initial cost - land 0      
Initial cost - building and improvements 0      
Initial cost - furniture, fixtures and equipment 3,219      
Initial cost - construction In-progress 0      
Costs Capitalized Subsequent to Acquisition 3,179      
Gross Carrying Amount - land and improvements 0      
Gross Carrying Amount - buildings and improvements 0      
Gross Carrying Amount - furniture, fixtures and equipment 5,704      
Gross Carrying Amount - Construction in-progress 694      
Gross Carrying Amount - total 6,398      
Accumulated depreciation (5,039)      
Net Book Value $ 1,359