Quarterly report pursuant to Section 13 or 15(d)

PENSION AND POST RETIREMENT BENEFIT PLANS (Details)

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PENSION AND POST RETIREMENT BENEFIT PLANS (Details) (USD $)
3 Months Ended 9 Months Ended
Sep. 30, 2011
Sep. 30, 2010
Sep. 30, 2011
Sep. 30, 2010
Dec. 31, 2011
Components of net periodic pension benefit costs          
Service cost $ 48,000   $ 144,000    
Interest cost 2,472,000 2,346,000 7,416,000 7,038,000  
Expected return on plan assets (3,016,000) (2,789,000) (9,048,000) (8,367,000)  
Amortization of net loss 450,000 278,000 1,350,000 834,000  
Net periodic benefit cost (Gain) (46,000) (165,000) (138,000) (495,000)  
Contribution by employer     4,800,000    
Further contributions to defined benefit retirement plan during the fiscal year         $ 400,000