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Contingencies (Details) In Thousands, except Per Share data, unless otherwise specified | 3 Months Ended | 12 Months Ended
--- | --- | ---
Apr. 02, 2011 USD ($) | Dec. 31, 2011 USD ($) | Dec. 31, 2010 USD ($) | Dec. 31, 2009 USD ($) | Dec. 31, 2011 Huntsville Site [Member] USD ($) | Dec. 31, 2011 Norco Site [Member] USD ($) | Dec. 31, 2011 Pending or Threatened Litigation [Member] USD ($) | Dec. 31, 2011 Tekelec Matter [Member] EUR (€) | Dec. 31, 2011 E ON AG [Member] USD ($) | Dec. 31, 2011 Groundwater Removal [Member] Huntsville Site [Member] USD ($) | Dec. 31, 2011 Groundwater Removal [Member] Norco Site [Member] USD ($) | Dec. 31, 2011 Project Management [Member] Norco Site [Member] USD ($) | Dec. 31, 2011 Investigation Report [Member] Norco Site [Member] USD ($)
Site Contingency [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Settlement of legal matter |  | $ 5,875 | $ 0 | $ 0 |  |  | $ 5,875 |  |  |  |  |  |
Settlement of legal matter | (3,609) | 3,609 | 0 | 0 |  |  | 3,609 |  |  |  |  |  |
Loss Related to Litigation Settlement Per Share |  |  |  |  |  |  | $ 0.03 |  |  |  |  |  |
Loss Contingency, Range of Possible Loss, Maximum |  |  |  |  |  |  |  | 11,333 |  |  |  |  |
Loss Contingency Damages Sought Value |  |  |  |  |  | 16,000 |  | 3,742 |  |  |  |  |
Loss Contingency, Expenses Sought, Value |  |  |  |  |  |  |  | 312 |  |  |  |  |
Site Contingency, Loss Exposure Not Accrued, Low Estimate |  |  |  |  | 3,000 |  |  |  |  |  |  |  |
Site Contingency, Loss Exposure Not Accrued, High Estimate |  |  |  |  | 4,000 |  |  |  |  |  |  |  |
Environmental Remediation Expense To Date |  |  |  |  |  |  |  |  |  | 4,000 | 11,000 | 30,000 |
Additional Expected Project Expenditures Low Estimate |  |  |  |  |  |  |  |  |  | 500 | 12,500 | 200 | 250
Additional Expected Project Expenditures High Estimate |  |  |  |  |  |  |  |  |  | 750 | 24,250 | 300 | 500
Future Costs Expected to Be Covered by Indeminifcations |  | 450 |  |  |  |  |  |  |  |  |  |  |
Loss Contingency, Related Receivable Carrying Value |  | 48,954 |  |  |  |  |  |  |  |  |  |  |
Loss Contingency, Related Receivable Carrying Value, Period Increase (Decrease) |  | 4,751 |  |  |  |  |  |  |  |  |  |  |
Environmental Cost Recognized, Recovery Credited to Expense |  | 13,000 |  |  |  |  |  |  |  |  |  |  |
Claim For Reimbursement of Pre Acquisition Tax Liabilities |  |  |  |  |  |  |  |  | 8,729 |  |  |  |
Pre Acquisition Tax Liabilities Acknowledged by Acquiree |  |  |  |  |  |  |  |  | 6,335 |  |  |  |
Business Combination, Tax Receivable Assumed, Expected to be Recovered |  |  |  |  |  |  |  |  | $ 4,495 |  |  |  |

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- Definition The net proceeds or assets obtained in excess of (less than) the net carrying amount of assets recorded, or assets distributed and liabilities assumed less than (in excess of) estimated litigation liability extinguished, in settlement of a litigation matter. Represents (for other than an insurance entity in its normal claims settlement process), the amount of income (expense) recognized in the period to settle pending or threatened litigation and insurance claims. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 5 -Paragraph 9, 10, 11, 12 -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy. Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 450 -SubTopic 20 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6952336&loc=d3e14326-108349 + Details
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