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RETIREMENT PLANS (Schedule of Benefit Plan Funded Status) (Details) - USD ($)
$ in Thousands
 12 Months Ended
Dec. 31, 2016
Dec. 31, 2015
Dec. 31, 2014
Defined Benefit Plan, Change in Benefit Obligation [Roll Forward]      
Benefit obligation at beginning of year $ 26,670 $ 27,165  
Service cost 795 881 $ 689
Interest cost 1,136 1,040 1,035
Change in assumptions 1,059 (1,438)  
Benefits paid (1,035) (978)  
Benefit obligation at end of year 28,625 26,670 27,165
Defined Benefit Plan, Change in Fair Value of Plan Assets [Roll Forward]      
Fair value of plan assets at beginning of year 36,880 38,163  
Actual return on plan assets 2,870 (305)  
Employer contribution 0 0  
Benefits paid (1,035) (978)  
Fair value of plan assets at end of year 38,715 36,880 $ 38,163
Funded Status, included in other assets 10,090 10,210  
Amounts recognized in accumulated other comprehensive income: Total net actuarial loss 8,859 8,923  
Amounts recognized in accumulated other comprehensive income: Prior service cost 0 1  
Total included in accumulated other comprehensive loss (pretax) $ 8,859 $ 8,924