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PENSION PLANS (Details 3) (USD $)
12 Months Ended
Dec. 31, 2012
Dec. 31, 2011
Dec. 31, 2010
Defined Benefit Retirement Plan
     
PENSION PLANS      
Fair value $ 23,780,000 $ 22,559,000 $ 23,220,000
Expected contribution      
Expected contribution to the defined benefit retirement plan 1,700,000    
Estimated future benefit payments      
2013 2,342,000    
2014 2,372,000    
2015 2,360,000    
2016 2,384,000    
2017 2,362,000    
2018-2022 11,518,000    
Total 23,338,000    
Estimated amortization of components included in AOCI that will be recognized into net periodic cost for the next fiscal year      
Amortization of net actuarial gain 2,400,000    
Defined Benefit Retirement Plan | Level 1
     
PENSION PLANS      
Fair value 17,038,000 16,404,000  
Defined Benefit Retirement Plan | Level 1 | Money market accounts
     
PENSION PLANS      
Fair value 1,022,000 1,869,000  
Defined Benefit Retirement Plan | Level 1 | Mutual funds
     
PENSION PLANS      
Fair value 9,524,000 439,000  
Defined Benefit Retirement Plan | Level 1 | Common Stock
     
PENSION PLANS      
Fair value 6,213,000 5,376,000  
Defined Benefit Retirement Plan | Level 1 | Exchange traded funds
     
PENSION PLANS      
Fair value   8,494,000  
Defined Benefit Retirement Plan | Level 1 | Preferred Stock
     
PENSION PLANS      
Fair value 279,000 226,000  
Defined Benefit Retirement Plan | Level 2
     
PENSION PLANS      
Fair value 6,742,000 6,155,000  
Defined Benefit Retirement Plan | Level 2 | Government obligations
     
PENSION PLANS      
Fair value 3,317,000 3,264,000  
Defined Benefit Retirement Plan | Level 2 | Corporate bonds and debentures
     
PENSION PLANS      
Fair value 3,425,000 2,891,000  
Defined Benefit Retirement Plan | Total
     
PENSION PLANS      
Fair value 23,780,000 22,559,000  
Defined Benefit Retirement Plan | Total | Money market accounts
     
PENSION PLANS      
Fair value 1,022,000 1,869,000  
Defined Benefit Retirement Plan | Total | Mutual funds
     
PENSION PLANS      
Fair value 9,524,000 439,000  
Defined Benefit Retirement Plan | Total | Government obligations
     
PENSION PLANS      
Fair value 3,317,000 3,264,000  
Defined Benefit Retirement Plan | Total | Common Stock
     
PENSION PLANS      
Fair value 6,213,000 5,376,000  
Defined Benefit Retirement Plan | Total | Exchange traded funds
     
PENSION PLANS      
Fair value   8,494,000  
Defined Benefit Retirement Plan | Total | Preferred Stock
     
PENSION PLANS      
Fair value 279,000 226,000  
Defined Benefit Retirement Plan | Total | Corporate bonds and debentures
     
PENSION PLANS      
Fair value 3,425,000 2,891,000  
SERP
     
Expected contribution      
Expected contribution to the defined benefit retirement plan 200,000    
Estimated future benefit payments      
2013 215,000    
2014 211,000    
2015 208,000    
2016 223,000    
2017 413,000    
2018-2022 2,109,000    
Total 3,379,000    
Estimated amortization of components included in AOCI that will be recognized into net periodic cost for the next fiscal year      
Amortization of transition obligation 17,000    
Amortization of prior service cost 18,000    
Amortization of net actuarial gain $ 71,000