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EARNINGS PER SHARE - Reconciliation of weighted average shares outstanding (Details) (USD $)
In Thousands, unless otherwise specified
 3 Months Ended 6 Months Ended
Jun. 30, 2014
Jun. 30, 2013
Jun. 30, 2014
Jun. 30, 2013
Earnings Per Share        
Net income available for stockholders $ 3,013 $ 1,935 $ 4,991 $ 3,384
Less: Dividends paid (1,147) (1,142) (2,291) (2,283)
Undistributed earnings $ 1,866 $ 793 $ 2,700 $ 1,101
Basic shares outstanding:        
Common stock 35,741 35,558 35,743 35,515
Restricted shares of common stock 1,248 1,271 1,230 1,259
Basic shares outstanding, Total 36,989 36,829 36,973 36,774
Diluted shares outstanding:        
Common stock 35,741 35,558 35,743 35,515
Dilutive effect of stock based awards 191 194 267 229
Diluted shares outstanding excluding restricted shares of common stock, Total 35,932 35,752 36,010 35,744
Restricted shares of common stock 1,248 1,271 1,230 1,259
Diluted shares outstanding, Total 37,180 37,023 37,240 37,003