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DIVIDENDS PER SHARE (Details) (USD $)
In Thousands, except Per Share data, unless otherwise specified
3 Months Ended
Mar. 31, 2013
Mar. 31, 2012
DIVIDENDS PER SHARE [Abstract]    
Date declared 2013-02  
Cash dividend declared (in dollars per share) $ 0.30  
Payment of cash dividends $ 17,514 $ 12,458
Date paid Mar. 13, 2013  
Date of record Feb. 22, 2013