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STOCK-BASED COMPENSATION, Restricted Stock Awards and Long Term Cash Incentive Plan (Details) - USD ($)
$ / shares in Units, $ in Thousands
12 Months Ended
Dec. 31, 2017
Dec. 31, 2016
Dec. 31, 2015
Restricted Stock [Member]      
Summary of Restricted Stock Awards [Roll Forward]      
Unvested allocated shares outstanding, beginning of period (in shares) 152,409 223,894  
Shares granted (in shares) 122,329 60,675  
Shares vested (in shares) (87,455) (116,042)  
Shares forfeited (in shares) (36,716) (16,118)  
Unvested allocated shares outstanding, end of period (in shares) 150,567 152,409 223,894
Weighted-Average Grant-Date Fair Value [Abstract]      
Unvested allocated shares outstanding, beginning of period (in dollars per share) $ 16.56 $ 15.36  
Shares granted (in dollars per share) 19.61 18.11  
Shares vested (in dollars per share) 16.43 15.09  
Shares forfeited (in dollars per share) 17.65 16.29  
Unvested allocated shares outstanding, end of period (in dollars per share) $ 18.85 $ 16.56 $ 15.36
Compensation expense recognized $ 1,358 $ 1,549 $ 1,855
Income tax benefit recognized $ 95 $ 78 $ 39
Weighted average remaining years for which compensation expense is to be recognized 2 years 8 months 12 days 1 year 7 months 6 days 1 year
Restricted Stock [Member] | Outside Directors [Member]      
Restricted Stock Awards [Abstract]      
Award vesting period 1 year    
Restricted Stock [Member] | Certain Officers [Member]      
Restricted Stock Awards [Abstract]      
Award vesting period 4 years    
Long Term Cash Incentive Payment Plan [Member] | Certain Officers [Member]      
Weighted-Average Grant-Date Fair Value [Abstract]      
Compensation expense recognized $ 190 $ 443 $ 946
Long Term Cash Incentive Payment Plan [Abstract]      
Percentage of threshold target for each award eligible to be earned based on relative performance 50.00%    
Percentage of target for each award eligible to be earned based on relative performance 100.00%    
Percentage of maximum target for each award eligible to be earned based on relative performance 150.00%    
Measurement period goals related to long term cash incentive payment plan award payment 3 years    
Liability for expected future cash -based long-term incentive payments $ 556