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EMPLOYEE BENEFITS (Asset Allocation) (Details) - Pension Plan [Member] - USD ($)
$ in Thousands
12 Months Ended
Dec. 31, 2015
Dec. 31, 2014
Dec. 31, 2013
Defined Benefit Plan Disclosure [Line Items]      
Plan Assets $ 106,600 $ 102,800 $ 92,219
Actual % of Total 100.00% 100.00%  
Fixed Maturity Securities - Corporate Bonds [Member]      
Defined Benefit Plan Disclosure [Line Items]      
Plan Assets $ 6,894 $ 9,035  
Actual % of Total 6.50% 8.80%  
Target Allocation, Minimum Percentage 0.00%    
Target Allocations, Maximum Percentage 15.00%    
Redeemable Preferred Stock [Member]      
Defined Benefit Plan Disclosure [Line Items]      
Plan Assets $ 3,744 $ 2,254  
Actual % of Total 3.50% 2.20%  
Target Allocation, Minimum Percentage 0.00%    
Target Allocations, Maximum Percentage 10.00%    
Equity Securities [Member]      
Defined Benefit Plan Disclosure [Line Items]      
Plan Assets $ 58,613 $ 58,223  
Actual % of Total 55.00% 56.60%  
Target Allocation, Minimum Percentage 50.00%    
Target Allocations, Maximum Percentage 70.00%    
Core Plus Bond Separate Account Fund [Member]      
Defined Benefit Plan Disclosure [Line Items]      
Plan Assets $ 6,605 $ 6,417  
Actual % of Total 6.20% 6.30%  
Target Allocation, Minimum Percentage 0.00%    
Target Allocations, Maximum Percentage 40.00%    
U.S. Property Separate Account Fund [Member]      
Defined Benefit Plan Disclosure [Line Items]      
Plan Assets $ 11,252 $ 9,895  
Actual % of Total 10.50% 9.60%  
Target Allocation, Minimum Percentage 0.00%    
Target Allocations, Maximum Percentage 25.00%    
Arbitrage Fund [Member]      
Defined Benefit Plan Disclosure [Line Items]      
Plan Assets $ 7,856 $ 7,637  
Actual % of Total 7.40% 7.40%  
Target Allocation, Minimum Percentage 0.00%    
Target Allocations, Maximum Percentage 10.00%    
United Life Annuity [Member]      
Defined Benefit Plan Disclosure [Line Items]      
Plan Assets $ 8,931 $ 8,506  
Actual % of Total 8.40% 8.30%  
Target Allocation, Minimum Percentage 5.00%    
Target Allocations, Maximum Percentage 10.00%    
Cash and Cash Equivalents [Member]      
Defined Benefit Plan Disclosure [Line Items]      
Plan Assets $ 2,705 $ 833  
Actual % of Total 2.50% 0.80%  
Target Allocation, Minimum Percentage 0.00%    
Target Allocations, Maximum Percentage 10.00%