v2.4.0.6

Asset Retirement Obligations (Tables) | 12 Months Ended
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Dec. 31, 2012
Asset Retirement Obligations [Abstract] |
Asset Retirement Obligation Rollforward Analysis | The following table presents the reconciliation of the beginning and ending aggregate carrying amounts of short-term and long-term legal obligations associated with the retirement of property, plant and equipment for the years ended December 31, 2012 and 2011 (in thousands):
|  | 2012 |  | 2011
Carrying Amount at Beginning of Period | $ | 587,084 | $ | 498,288
| Liabilities Incurred |  | 107,378 |  | 68,703
| Liabilities Settled (1) |  | (77,384) |  | (66,129)
| Accretion |  | 30,020 |  | 27,907
| Revisions |  | 15,287 |  | 58,786
| Foreign Currency Translations |  | 3,559 |  | (471)
Carrying Amount at End of Period | $ | 665,944 | $ | 587,084
Current Portion | $ | 30,127 | $ | 29,527
Noncurrent Portion | $ | 635,817 | $ | 557,557
(1) Includes settlements related to asset sales.

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- Definition Tabular disclosure of the carrying amount of a liability for asset retirement obligations. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 410 -SubTopic 20 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6392692&loc=d3e7535-110849 + Details
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