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 $)
In Thousands, unless otherwise specified
3 Months Ended 9 Months Ended 12 Months Ended
Sep. 30, 2013
Sep. 30, 2012
Sep. 30, 2013
Sep. 30, 2012
Dec. 31, 2013
Dec. 31, 2012
Components of net periodic pension benefit Gain            
Interest and service cost $ 2,166 $ 2,337 $ 6,498 $ 7,011    
Expected return on plan assets (2,897) (2,961) (8,691) (8,883)    
Amortization of net loss 977 632 2,931 1,896    
Net periodic benefit gain/(loss) 246 8 738 24    
Contribution by employer     2,500 2,300   5,200
Further contributions to defined benefit retirement plan during the fiscal year         $ 2,500