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SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (Narrative) (Details) - USD ($)
 12 Months Ended
Dec. 31, 2015
Dec. 31, 2014
Dec. 31, 2013
Summary Of Significant Accounting Policies [Line Items]      
Trading gains $ 666,000 $ 133,000
Allowance for doubtful accounts receivable 2,063,000 2,391,000  
Intangible asset impairment loss 255,000    
Goodwill 3,356,000 4,041,000 $ 5,433,000 [1]
Goodwill impairment loss 674,000 879,000 3,093,000
Severance expenses 1,386,000 1,460,000 882,000
Advertising expenses $ 6,800,000 6,700,000 $ 7,600,000
Deferred expenses amortization period 20 months    
Investment impairment loss $ 0 0  
Antidilutive shares 0    
Minimum [Member]      
Summary Of Significant Accounting Policies [Line Items]      
Ownership percentage, equity method 20.00%    
Maximum [Member]      
Summary Of Significant Accounting Policies [Line Items]      
Ownership percentage, equity method 50.00%    
Certain Reporting Units [Member]      
Summary Of Significant Accounting Policies [Line Items]      
Goodwill $ 700,000    
Goodwill impairment loss 700,000    
Goodwill, fair value $ 0    
Certain Reporting Unit One [Member]      
Summary Of Significant Accounting Policies [Line Items]      
Goodwill   1,500,000  
Goodwill impairment loss   900,000  
Goodwill, fair value   $ 700,000  
[1] The accumulated amount of impairment loss as of December 31, 2013, December 31, 2014 and December 31, 2015 was US$ 5,545,000, US$ 6,424,000 and US$ 7,098,000, respectively.