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EMPLOYEE BENEFIT PLANS - Components of net periodic benefit cost (Details) (USD $)
In Thousands, unless otherwise specified
 12 Months Ended
Dec. 31, 2013
Dec. 31, 2012
Dec. 31, 2011
Defined Benefit Plan Disclosure [Line Items]      
Amortization of net loss $ 32    
Net periodic benefit, Total 32    
Retirement Income Plan
      
Defined Benefit Plan Disclosure [Line Items]      
Service cost for benefits earned during the period         
Interest cost on projected benefit obligation 235 253 267
Expected return on plan assets (369) (328) (324)
Amortization of net loss 68 61 38
Net periodic benefit, Total $ (66) $ (14) $ (19)