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STOCK-BASED COMPENSATION (Narrative) (Details) - USD ($)
shares in Thousands
3 Months Ended 13 Months Ended
Mar. 31, 2016
Mar. 31, 2015
Mar. 31, 2016
Mar. 13, 2015
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Stock-based compensation $ 2,100,000 $ 1,800,000    
Income tax benefit 500,000 500,000    
Share repurchase program shares authorized       $ 300,000,000
Repurchases of common stock (in shares)     3,500  
Repurchases of common stock 4,998,000   $ 182,700,000  
Stock repurchase program, remaining authorized repurchase amount $ 117,300,000   117,300,000  
Minimum        
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Restriction period 3 years      
Maximum        
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Restriction period 5 years      
Restricted stock awards        
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Unrecognized compensation cost $ 12,400,000   12,400,000  
Period for recognition 2 years 329 days      
Fair value restricted stock $ 3,800,000 3,200,000    
Performance stock awards        
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Unrecognized compensation cost 600,000   $ 600,000  
Fair value restricted stock $ 400,000 $ 300,000    
Common Stock        
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Repurchases of common stock (in shares) 104      
Repurchases of common stock $ 1,000