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EMPLOYEE BENEFIT PLANS (Details Textual) - USD ($)
 12 Months Ended
Dec. 31, 2016
Dec. 31, 2015
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 Benefit Plan, Future Amortization of Gain (Loss) [1],[2] $ 788,000 $ 946,000    
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 $ 1,300,000      
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 Recognized $ 447,000 $ 433,000    
Equity Securities [Member]        
Defined Benefit Plan Disclosure [Line Items]        
Defined Benefit Plan, Target Plan Asset Allocations 60.00%      
Defined Benefit Plan, Target Plan Asset Allocations Range Minimum 50.00%      
Defined Benefit Plan, Target Plan Asset Allocations Range Maximum 60.00%      
Debt Securities [Member]        
Defined Benefit Plan Disclosure [Line Items]        
Defined Benefit Plan, Target Plan Asset Allocations Range Minimum 40.00%      
Defined Benefit Plan, Target Plan Asset Allocations Range Maximum 50.00%      
Pension Plans, Defined Benefit [Member]        
Defined Benefit Plan Disclosure [Line Items]        
Defined Benefit Plan, Amount of Employer and Related Party Securities Included in Plan Assets $ 770,000      
Defined Benefit Plan Maximum Percent Of Assets Comprised Of Entity Common Stock 10.00%      
Defined Benefit Plan, Future Amortization of Gain (Loss) $ 1,583,000      
Defined Benefit Plan, Assumptions Used Calculating Net Periodic Benefit Cost, Expected Long-term Return on Assets 7.75% 8.00% 8.00% 7.75%
Defined Benefit Plan Percent Of Assets Comprised Of Entity Common Stock 2.50%      
Defined Benefit Plans, Estimated Future Employer Contributions in Next Fiscal Year $ 3,000,000      
[1] Amounts in parentheses indicate credits.
[2] These accumulated other comprehensive loss components are included in the computation of net periodic benefit cost (see Note 14 for additional details).