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Accrued Environmental Remediation Costs (Tables)
12 Months Ended
Dec. 31, 2011
Accrued Environmental Remediation Costs [Abstract]  
Accrued Environmental Remediation Costs
      $000,000       $000,000  
  in thousands   2011     2010  
     

  Accrued Environmental Remediation Costs

               

  Continuing operations

    $6,335       $6,138  

  Retained from former Chemicals business

    5,652       4,645  

  Total

    $11,987       $10,783