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DIVIDENDS PER SHARE (Details) (USD $)
In Thousands, except Per Share data, unless otherwise specified
3 Months Ended 6 Months Ended
Jun. 30, 2014
Mar. 31, 2014
Jun. 30, 2013
Jun. 30, 2014
Jun. 30, 2013
DIVIDENDS PER SHARE [Abstract]          
Date declared 2014-05   2014-03 2014-05 2014-03
Cash dividend declared (in dollars per share) $ 0.345   $ 0.345    
Payment of cash dividends $ 20,355 $ 20,141,000   $ 40,511 $ 35,140
Date paid Jun. 11, 2014   Mar. 26, 2014    
Date of record May 23, 2014   Mar. 14, 2014