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Derivative Instruments And Hedging Activities (Tables) | 12 Months Ended
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Dec. 31, 2012
Derivative Instruments And Hedging Activities [Abstract] |
Derivatives Designated As Hedging Instruments |
|  | As of December 31, 2012 |  | As of December 31, 2011 |
|  | Balance Sheet |  | Fair |  | Balance Sheet |  | Fair |
|  | Location |  | Value |  | Location |  | Value |
Asset Derivatives: |  |  |  |  |  |  |  |  |
Natural gas contracts |  | Other current assets | $ | - |  | Other current assets | $ | 12,957 |
Oil contracts |  | Other current assets |  | - |  | Other current assets |  | 8,567 |
Natural gas contracts |  | Other assets, net |  | - |  | Other assets, net |  | 857 |
Interest rate swaps |  | Other assets, net |  | - |  | Other assets, net |  | 327 |
|  |  | $ | - |  |  | $ | 22,708 |
Liability Derivatives: |  |  |  |  |  |  |  |  |
Oil contracts |  | Accrued liabilities | $ | - |  | Accrued liabilities | $ | 886 |
Interest rate swaps |  | Accrued liabilities |  | - |  | Accrued liabilities |  | 202 |
Oil contracts |  | Other long-term liabilities |  | - |  | Other long-term liabilities |  | 1,712 |
|  |  | $ | - |  |  | $ | 2,800 |
Derivatives Not Designated As Hedging Instruments |
|  | As of December 31, 2012 |  | As of December 31, 2011 |
|  | Balance Sheet |  | Fair |  | Balance Sheet |  | Fair |
|  | Location |  | Value |  | Location |  | Value |
Asset Derivatives: |  |  |  |  |  |  |  |  |
Oil contracts |  | Other current assets | $ | 5,800 |  | Other current assets | $ | - |
Foreign exchange forwards |  | Other current assets |  | 146 |  | Other current assets |  | 55 |
|  |  | $ | 5,946 |  |  | $ | 55 |
Liability Derivatives: |  |  |  |  |  |  |  |  |
Oil contracts |  | Accrued liabilities | $ | 15,777 |  | Accrued liabilities | $ | - |
Interest rate swaps |  | Accrued liabilities |  | 489 |  | Accrued liabilities |  | - |
Foreign exchange forwards |  | Accrued liabilities |  | - |  | Accrued liabilities |  | 159 |
Interest rate swaps |  | Other long-term liabilities |  | 32 |  | Other long-term liabilities |  | - |
|  |  | $ | 16,298 |  |  | $ | 159 |
Impact Of Derivative Instruments On Accumulated Comprehensive Income (Loss) |
|  | Gain (Loss) Recognized in OCI on Derivatives |
|  | (Effective Portion) |
|  | Year Ended December 31, |
|  | 2012 |  |  | 2011 |  |  | 2010 |
Oil and natural gas commodity contracts | $ | (12,860) |  | $ | 28,749 |  | $ | (6,486) |
Interest rate swaps |  | (81) |  |  | 1,294 |  |  | (1,213) |
| $ | (12,941) |  | $ | 30,043 |  | $ | (7,699) |
Gain (Loss) Reclassified From Accumulated OCI Into Income |
|  |  |  |  | Gain (Loss) Reclassified from |
|  | Reclassified from |  |  | Accumulated OCI into Income |
|  | Location of Gain (Loss) |  |  | (Effective Portion) |
|  | Accumulated OCI into Income |  |  | Year Ended December 31, |
|  | (Effective Portion) |  |  | 2012 |  |  | 2011 |  |  | 2010 |
Oil and natural gas commodity contracts |  | Income (loss) from discontinued operations, net of tax |  | $ | 3,184 |  | $ | (21,659) |  | $ | 25,575 |
Interest rate swaps |  | Net interest expense |  |  | (523) |  |  | (2,010) |  |  | (1,849) |
|  |  |  | $ | 2,661 |  | $ | (23,669) |  | $ | 23,726 |
Impact Of Non Designated Derivative Instruments On Income Statement |
|  |  |  |  | Gain (Loss) Recognized in Income |
|  | Location of Gain (Loss) |  |  | on Derivatives |
|  | Recognized in Income |  |  | Year Ended December 31, |
|  | on Derivatives |  |  | 2012 |  |  | 2011 |  |  | 2010 |
Oil and natural gas commodity contracts |  | Income (loss) from discontinued operations, net of tax |  | $ | 5,550 |  | $ | - |  | $ | 1,088 |
Oil and natural gas commodity contracts |  | Non-hedge loss on commodity derivative contracts |  |  | (10,507) |  |  | - |  |  | - |
Interest rate swaps |  | Other income (expense), net |  |  | (567) |  |  | - |  |  | - |
Foreign exchange forwards |  | Other income (expense), net |  |  | 411 |  |  | 249 |  |  | (2,560) |
|  |  |  | $ | (5,113) |  | $ | 249 |  | $ | (1,472) |

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- Definition Tabular disclosure of the effective portion of gains and losses on derivative instruments (and nonderivative instruments) designated and qualifying in cash flow hedges recorded in accumulated other comprehensive income (loss) during the term of the hedging relationship and reclassified into earnings during the current period. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 815 -SubTopic 10 -Section 50 -Paragraph 4C -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=7476318&loc=SL5624171-113959 + Details
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- Definition Tabular disclosure for cash flow hedging instruments of (a) the location and amount of gains and losses reported in the statement of financial performance and (b) the location and fair value amounts of the instruments reported in the statement of financial position. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 815 -SubTopic 10 -Section 50 -Paragraph 4C -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=7476318&loc=SL5624171-113959 + Details
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- Definition Tabular disclosure of the effective portion of the gains and losses on derivative instruments designated (and non-derivative instruments) designated and qualifying in cash flow hedges and net investment hedges that was recognized in other comprehensive income (loss) during the current period. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 815 -SubTopic 10 -Section 50 -Paragraph 4C -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=7476318&loc=SL5624171-113959 + Details
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