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HEALTH, SAFETY AND ENVIRONMENTAL MATTERS Table 2 (Details) (USD $)
In Thousands, unless otherwise specified
Dec. 31, 2013
Dec. 31, 2012
Dec. 31, 2011
Environmental Accruals by Balance Sheet Location [Line Items]      
Accrued liabilities $ 3,299 $ 10,627  
Other long-term liabilities 2,934 2,824  
Accruals for environmental matters $ 6,233 $ 13,451 $ 23,113