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OTHER LONG-TERM LIABILITIES (Details) (USD $)
In Thousands, unless otherwise specified
Dec. 31, 2012
Dec. 31, 2011
OTHER LONG-TERM LIABILITIES [Abstract]    
Accrued pension liabilities $ 61,477 $ 43,400
Accrued Employee Benefits 18,276 14,656
Accrued Income Taxes, Noncurrent 13,779 0
Derivative Liabilities, Noncurrent 5,784 0
Supply agreement liability 0 19,470
Other 7,780 3,543
Other Liabilities, Noncurrent $ 107,096 $ 81,069