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INVESTMENTS (Narrative) (Details) - USD ($)
3 Months Ended
Mar. 31, 2017
Mar. 31, 2016
Dec. 31, 2016
Schedule of Investments [Line Items]      
Equity method investments, at fair value $ 15,088,000   $ 14,895,000
Available-for-sale securities $ 21,223,000   $ 17,009,000
Publicly traded common stock (in shares) 2,759,748   2,264,892
Cumulative unrealized gains $ 700,000    
Accumulated other comprehensive income 65,000   $ 33,000
Available for sale impairment 0 $ 0  
Redeemable Non Controlling Interest [Member]      
Schedule of Investments [Line Items]      
Cumulative unrealized gains 300,000    
Sierra Income Corporation [Member]      
Schedule of Investments [Line Items]      
Equity method investments, at fair value 9,000,000   $ 9,000,000
Medley LLC [Member] | AOCI Attributable to Noncontrolling Interest [Member]      
Schedule of Investments [Line Items]      
Cumulative unrealized gains 300,000    
CK Pearl Fund [Member]      
Schedule of Investments [Line Items]      
Loss from other than temporary impairment equity investments $ 0 $ 0