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EMPLOYEE BENEFIT PLANS (Details) - Pension Plans, Defined Benefit [Member] - USD ($)
$ in Thousands
 12 Months Ended
Dec. 31, 2016
Dec. 31, 2015
Dec. 31, 2014
CHANGE IN BENEFIT OBLIGATION:      
Benefit obligation at beginning of year $ 33,117 $ 33,701  
Service cost 1,468 1,557 $ 1,601
Interest cost 1,430 1,341 1,368
Actuarial (gain) loss 4,578 (1,063)  
Benefits paid (1,956) (2,419)  
Benefit obligation at end of year 38,637 33,117 33,701
CHANGE IN PLAN ASSETS:      
Fair value of plan assets at beginning of year 28,429 27,367  
Actual return on plan assets 348 (154)  
Employer contributions 3,850 3,635  
Benefits paid (1,956) (2,419)  
Fair value of plan assets at end of year 30,671 28,429 $ 27,367
Funded status of the plan - under funded $ (7,966) $ (4,688)