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EMPLOYEE BENEFIT PLANS (Details Textual)
 12 Months Ended
Dec. 31, 2018
USD ($)
Dec. 31, 2017
USD ($)
Dec. 31, 2016
USD ($)
Dec. 31, 2014
Dec. 31, 2013
Defined Benefit Plan Disclosure [Line Items]          
Defined Benefit Plan Minimum Number Of Annual Employee Hours 1,000        
Defined Benefit Plan Maximum Percent Of Assets Comprised Of Entity Common Stock 10.00%        
Defined Contribution Plan Maximum Annual Contribution Per Union Employee Percent 4.00% 4.00%      
Defined Contribution Plan Amount Of Entity Common Stock And Securities Held $ 1,200,000        
Defined Contribution Plan, Employer Matching Contribution, Percent of Match       6.00% 2.00%
Defined Contribution Plan, Maximum Annual Contributions Per Employee, Percent       3.00% 1.00%
Defined Contribution Plan, Cost 503,000 $ 469,000 $ 447,000    
Defined Benefit Plan, Expected Amortization of Gain (Loss), Next Fiscal Year $ 1,610,000        
Equity Securities [Member]          
Defined Benefit Plan Disclosure [Line Items]          
Defined Benefit Plan, Plan Assets, Target Allocation, Percentage 60.00%        
Equity Securities [Member] | Minimum [Member]          
Defined Benefit Plan Disclosure [Line Items]          
Defined Benefit Plan, Plan Assets, Target Allocation, Percentage 50.00%        
Equity Securities [Member] | Maximum [Member]          
Defined Benefit Plan Disclosure [Line Items]          
Defined Benefit Plan, Plan Assets, Target Allocation, Percentage 60.00%        
Debt Securities [Member] | Minimum [Member]          
Defined Benefit Plan Disclosure [Line Items]          
Defined Benefit Plan, Plan Assets, Target Allocation, Percentage 40.00%        
Debt Securities [Member] | Maximum [Member]          
Defined Benefit Plan Disclosure [Line Items]          
Defined Benefit Plan, Plan Assets, Target Allocation, Percentage 50.00%        
Pension Plans, Defined Benefit [Member]          
Defined Benefit Plan Disclosure [Line Items]          
Defined Benefit Plan Maximum Percent Of Assets Comprised Of Entity Common Stock 10.00%        
Defined Benefit Plan, Assumptions Used Calculating Net Periodic Benefit Cost, Expected Long-term Rate of Return on Plan Assets 7.50% 7.75% 7.75%    
Defined Benefit Plan Percent Of Assets Comprised Of Entity Common Stock 3.10%        
Defined Benefit Plan, Expected Future Employer Contributions, Next Fiscal Year $ 2,000,000        
Pension Plans, Defined Benefit [Member] | Debt Securities [Member]          
Defined Benefit Plan Disclosure [Line Items]          
Defined Benefit Plan, Plan Assets, Employer, Related Party, Amount $ 1,200,000