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TREASURY STOCK (Details) - USD ($)
Mar. 31, 2016
Dec. 31, 2015
Oct. 29, 2014
Aug. 19, 2014
Equity, Class of Treasury Stock [Line Items]        
Treasury stock, shares 6,061,503 6,061,503    
Treasury stock, value $ 150,804,000 $ 150,804,000    
Additional shares available to repurchase, value $ 149,196,000      
Class A Common Stock [Member]        
Equity, Class of Treasury Stock [Line Items]        
Repurchased amount       $ 200,000,000
Additional shares authorized, value     $ 100,000,000  
Repurchase Program [Member] | Class A Common Stock [Member]        
Equity, Class of Treasury Stock [Line Items]        
Treasury stock, shares 6,050,000.00      
Treasury stock, value $ 150,804,000