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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

X

- 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.

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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.

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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).

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