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EMPLOYEE BENEFIT PLANS (Details) (USD $)
 3 Months Ended 6 Months Ended
Jun. 30, 2012
Jun. 30, 2011
Jun. 30, 2012
Jun. 30, 2011
EMPLOYEE BENEFIT PLANS [Abstract]        
Defined Benefit Plan, Contributions by Employer $ 1,100,000   $ 1,700,000  
Defined Benefit Plan, Estimated Future Employer Contributions in Current Fiscal Year 4,900,000   4,900,000  
Defined Benefit Plan, Interest Cost 1,133,000 1,272,000 2,266,000 2,544,000
Defined Benefit Plan, Expected Return on Plan Assets (1,252,000) (1,315,000) (2,504,000) (2,630,000)
Other Comprehensive Income (Loss), Amortization, Pension and Other Postretirement Benefit Plans, Net Prior Service Cost (Credit) Recognized in Net Periodic Benefit Cost, before Tax 34,000 34,000 68,000 68,000
Amortization of Unrecognized Deferred Taxes 0 (14,000) 0 (28,000)
Defined Benefit Plan, Amortization of Gains (Losses) 1,293,000 936,000 2,586,000 1,872,000
Defined Benefit Plan, Net Periodic Benefit Cost $ 1,208,000 $ 913,000 $ 2,416,000 $ 1,826,000