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EMPLOYEE BENEFIT PLANS (Details) - USD ($)
$ in Thousands
 12 Months Ended
Dec. 31, 2015
Dec. 31, 2014
Dec. 31, 2013
CHANGE IN PLAN ASSETS:      
Fair value of plan assets at beginning of year $ 27,367    
Fair value of plan assets at end of year 28,429 $ 27,367  
Pension Plans, Defined Benefit [Member]      
CHANGE IN BENEFIT OBLIGATION:      
Benefit obligation at beginning of year 33,701 30,249  
Service cost 1,557 1,601 $ 1,703
Interest cost 1,341 1,368 1,189
Actuarial (gain) loss (1,063) 3,406  
Curtailments 0 328  
Special/contractual termination benefits 0 376  
Benefits paid (2,419) (3,627)  
Benefit obligation at end of year 33,117 33,701 30,249
CHANGE IN PLAN ASSETS:      
Fair value of plan assets at beginning of year 27,367 26,288  
Actual return on plan assets (154) 2,056  
Employer contributions 3,635 2,650  
Benefits paid (2,419) (3,627)  
Fair value of plan assets at end of year 28,429 27,367 $ 26,288
Funded status of the plan - under funded $ (4,688) $ (6,334)