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INCOME PER COMMON SHARE (Details)
3 Months Ended
Mar. 31, 2013
Mar. 31, 2012
INCOME PER COMMON SHARE [Abstract]    
Incremental shares used in calculation of diluted income per share (in shares) 245,000 625,517
Incremental shares not included in calculation of diluted earnings per share (in shares) 239,734 55,000