Quarterly report pursuant to Section 13 or 15(d)

EMPLOYEE BENEFIT PLANS (Details)

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EMPLOYEE BENEFIT PLANS (Details) (Defined benefit pension plan, USD $)
In Thousands, unless otherwise specified
3 Months Ended 6 Months Ended
Jun. 30, 2012
Jun. 30, 2011
Jun. 30, 2012
Jun. 30, 2011
Defined benefit pension plan
       
Net periodic benefit costs for qualified benefit pension plan        
Service Cost $ 1,750 $ 1,550 $ 3,500 $ 3,100
Interest Cost 1,375 1,325 2,750 2,650
Expected Return on Plan Assets (1,700) (1,650) (3,400) (3,300)
Prior Service Cost Amortization 100 125 200 250
Net Loss (Gain) Amortization 850 550 1,700 1,100
Net Periodic Benefit Cost $ 2,375 $ 1,900 $ 4,750 $ 3,800
Discount Rate ( in percent) 5.00% 5.55%   5.55%
Long-Term Rate of Return on Assets ( in percent) 8.00% 8.00% 8.00% 8.00%