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Liabilities for Dispositions and Discontinued Operations Analysis of Activity (Details) (USD $) In Thousands, unless otherwise specified | 12 Months Ended
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Dec. 31, 2011 | Dec. 31, 2010 | Dec. 31, 2009
Accrual for Environmental Loss Contingencies [Roll Forward] |  |  |
Balance, January 1 | $ 93,160 | $ 98,591 | $ 104,575
Expenditures charged to liabilities | (9,209) | (8,632) | (8,095)
Increase to liabilities | 6,873 | 3,201 | 2,111
Balance, December 31 | 90,824 | 93,160 | 98,591
Less: Current Portion | (9,931) | (11,500) | (10,648)
Non-Current Portion | $ 80,893 | $ 81,660 | $ 87,943

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- Definition The Increase or Decrease in the accrual for environmental loss in the period from revisions in estimates to existing obligations. The amount does not relate to changes in the environmental accrual related to business acquisitions or divestitures, or to currency movements. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 450 -SubTopic 20 -Section S99 -Paragraph 1 -Subparagraph (SAB TOPIC 5.Y.Q2) -URI http://asc.fasb.org/extlink&oid=6572457&loc=d3e149879-122751 + Details
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