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STOCK-BASED COMPENSATION (Tables)
12 Months Ended
Dec. 31, 2017
Disclosure of Compensation Related Costs, Share-based Payments [Abstract]  
Schedule of stock option plans, changes in options outstanding

Changes in options outstanding during 2017 were as follows:

 

           Weighted     
       Weighted   Average   Aggregate 
       Average   Remaining   Intrinsic 
   Number of   Exercise   Contractual   Value 
   Options   Price   Term   (In Thousands) 
Balance, January 1, 2017   179,159   $16.27           
Granted during 2017                  
Exercised during 2017   (50,473)   19.07           
Expired during 2017   (7,722)   26.90           
Forfeited during 2017   (881)   15.62           
Balance, December 31, 2017   120,083   $14.41    3.38 years   $2,475 
Vested and expected to vest   120,083   $14.41    3.38 years   $2,475 
Exercisable at December 31, 2017   120,083   $14.41    3.38 years   $2,475 
                     
Schedule of changes in nonvested performance-based shares

Changes in non-vested shares dependent on performance criteria for 2017 were as follows:

 

       Weighted 
       Average 
   Number of   Grant Date 
   Shares   Fair Value 
Balance, January 1, 2017   92,767   $18.12 
Granted during 2017        
Vested during 2017        
Forfeited during 2017        
Balance, December 31, 2017   92,767   $18.12 
Schedule of changes in nonvested shares

Changes in service based restricted stock awards/units for 2017 were as follows:

 

       Weighted 
       Average 
   Number of   Grant Date 
   Shares   Fair Value 
Balance, January 1, 2017   368,130   $19.26 
Granted during 2017   136,708    30.13 
Vested during 2017   (184,525)   18.93 
Forfeited during 2017   (11,688)   27.59 
Balance, December 31, 2017   308,625   $23.96