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Fair Value Measurements (Tables) | 12 Months Ended
--- | ---
Dec. 31, 2012
Fair Value Measurements |
Financial assets and liabilities measured at fair value on a recurring basis |
(In thousands) |  | Quoted Prices in Active Markets for Identical Assets (Level 1) |  | Significant Other Observable Inputs (Level 2) |  | Significant Unobservable Inputs (Level 3) |  | Balance as of December 31, 2012 |
--- | --- | --- | --- | --- | --- | --- | --- | --- | ---
Assets |  |  |  |  |  |  |  |  |  |  |  |  |
Deferred compensation plan |  | $ | 10,608 |  | $ | — |  | $ | — |  | $ | 10,608 |
Derivative contracts |  |  | — |  |  | 9,473 |  |  | 41,351 |  |  | 50,824 |
Total assets |  | $ | 10,608 |  | $ | 9,473 |  | $ | 41,351 |  | $ | 61,432 |
Liabilities |  |  |  |  |  |  |  |  |  |  |  |  |
Deferred compensation plan |  | $ | 23,893 |  | $ | — |  | $ | — |  | $ | 23,893 |
Derivative contracts |  |  | — |  |  | — |  |  | 192 |  |  | 192 |
Total liabilities |  | $ | 23,893 |  | $ | — |  | $ | 192 |  | $ | 24,085 |
(In thousands) |  | Quoted Prices in Active Markets for Identical Assets (Level 1) |  | Significant Other Observable Inputs (Level 2) |  | Significant Unobservable Inputs (Level 3) |  | Balance as of December 31, 2011 |
--- | --- | --- | --- | --- | --- | --- | --- | --- | ---
Assets |  |  |  |  |  |  |  |  |  |  |  |  |
Deferred compensation plan |  | $ | 10,838 |  | $ | — |  | $ | — |  | $ | 10,838 |
Derivative contracts |  |  | — |  |  | — |  |  | 195,512 |  |  | 195,512 |
Total assets |  | $ | 10,838 |  | $ | — |  | $ | 195,512 |  | $ | 206,350 |
Liabilities |  |  |  |  |  |  |  |  |  |  |  |  |
Deferred compensation plan |  | $ | 20,187 |  | $ | — |  | $ | — |  | $ | 20,187 |
Derivative contracts |  |  | — |  |  | — |  |  | 385 |  |  | 385 |
Total liabilities |  | $ | 20,187 |  | $ | — |  | $ | 385 |  | $ | 20,572 |
Fair Value of Financial Assets and Liabilities Classified as Level 3 |
|  | Year Ended December 31, |
--- | --- | --- | ---
(In thousands) |  | 2012 |  | 2011 |  | 2010 |
Balance at beginning of period |  | $ | 195,127 |  | $ | 14,746 |  | $ | 112,307 |
Total gains or (losses) (realized or unrealized): |  |  |  |  |  |  |  |  |  |
Included in earnings(1) |  |  | 224,614 |  |  | 85,375 |  |  | 172,764 |
Included in other comprehensive income |  |  | (157,478 | ) |  | 181,346 |  |  | (97,335 | )
Settlements |  |  | (221,489 | ) |  | (86,340 | ) |  | (172,990 | )
Transfers in and/or out of level 3 |  |  | 385 |  |  | — |  |  | — |
Balance at end of period |  | $ | 41,159 |  | $ | 195,127 |  | $ | 14,746 |
(1) A loss of $0.5 million, $1.0 million and $0.2 million for the years ended December 31, 2012, 2011 and 2010, respectively, was unrealized and included in Natural gas revenues in the Consolidated Statement of Operations.
Carrying amounts and fair values of long-term debt |
|  | December 31, 2012 |  | December 31, 2011 |
--- | --- | --- | --- | --- | ---
(In thousands) |  | Carrying Amount |  | Estimated Fair Value |  | Carrying Amount |  | Estimated Fair Value |
Long-term debt |  | $ | 1,087,000 |  | $ | 1,213,474 |  | $ | 950,000 |  | $ | 1,082,531 |
Current maturities |  |  | (75,000 | ) |  | (77,175 | ) |  | — |  |  | — |
Long-term debt, excluding current maturities |  | $ | 1,012,000 |  | $ | 1,136,299 |  | $ | 950,000 |  | $ | 1,082,531 |

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- Definition Tabular disclosure of the fair value measurement of assets and liabilities using significant unobservable inputs (Level 3), a reconciliation of the beginning and ending balances, separately presenting changes during the period attributable to the following: (1) total gains or losses for the period (realized and unrealized), segregating those gains or losses included in earnings (or changes in net assets) and gains or losses recognized in other comprehensive income, and a description of where those gains or losses included in earnings (or changes in net assets or liabilities) are reported in the statement of income (or activities); (2) purchases, sales, issuances, and settlements (each type disclosed separately); and (3) transfers in and transfers out of Level 3 (for example, transfers due to changes in the observability of significant inputs), by class of asset or liability. + References No definition available. + Details
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- Definition Tabular disclosure of the fair value of financial instruments (as defined), including financial assets and financial liabilities (collectively, as defined), and the measurements of those instruments, assets, and liabilities. Such certain disclosures about the financial instruments, assets, and liabilities include: (1) the fair value of the required items together with their carrying amounts (as appropriate) and (2) the methodology and assumptions used in developing such estimates of fair value. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 107 -Paragraph 14 -Subparagraph a -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 Statement of Financial Accounting Standard (FAS) -Number 159 -Paragraph 18 -Subparagraph c(2), d, e, f -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 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 825 -SubTopic 10 -Section 50 -Paragraph 10 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=7491637&loc=d3e13433-108611 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 107 -Paragraph 15 -Subparagraph b-d -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 5: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 825 -SubTopic 10 -Section 50 -Paragraph 11 -URI http://asc.fasb.org/extlink&oid=7491637&loc=d3e13467-108611 Reference 6: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 159 -Paragraph 19 -Subparagraph a, b, c(1), d(1) -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 7: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 820 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=7578670&loc=d3e19207-110258 Reference 8: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 825 -SubTopic 10 -Section 45 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=6447952&loc=d3e13220-108610 Reference 9: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 157 -Paragraph 32 -Subparagraph a, c(1), c(2), c(3), d -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 10: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 107 -Paragraph 10 -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 11: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 825 -SubTopic 10 -Section 50 -Paragraph 12 -URI http://asc.fasb.org/extlink&oid=7491637&loc=d3e13476-108611 Reference 12: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 825 -SubTopic 10 -Section 50 -Paragraph 30 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=6957238&loc=d3e14172-108612 + Details
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- Definition Tabular disclosure of assets and liabilities, including [financial] instruments measured at fair value that are classified in stockholders' equity, if any, that are measured at fair value on a recurring basis. The disclosures contemplated herein include the fair value measurements at the reporting date by the level within the fair value hierarchy in which the fair value measurements in their entirety fall, segregating fair value measurements using quoted prices in active markets for identical assets (Level 1), significant other observable inputs (Level 2), and significant unobservable inputs (Level 3). + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 820 -SubTopic 10 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=7578670&loc=d3e19190-110258 + Details
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