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EMPLOYEE BENEFIT PLAN (Detail Textuals) (USD $)
3 Months Ended
Mar. 31, 2013
Multiple Employer Retirement Income Plan
Mar. 31, 2013
Non-qualified Supplemental Retirement Plan ("SERP")
Dec. 31, 2012
Non-qualified Supplemental Retirement Plan ("SERP")
Multiemployer Plans [Line Item]      
Contribution by employer for retirement income plan $ 800,000    
SERP assets   $ 11,717,000 $ 11,103,000