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Fair Value Measurements (Tables)

6 Months Ended

Jun. 30, 2011

Fair Value Measurements

Assets and liabilities measured at fair value on a recurring basis

						Fair value measurements at reporting date using
Description		June 30, 2011				Quoted prices in active markets for identical assets (Level 1)				Significant other observable inputs (Level 2)				Significant unobservable inputs (Level 3)
		(Thousands)
Assets
Derivative instruments, at fair value		$	211,986			$	2,698			$	107,316			$	101,972
Total assets		$	211,986			$	2,698			$	107,316			$	101,972
Liabilities
Derivative instruments, at fair value		$	97,531			$	3,339			$	94,192			$	–
Total liabilities		$	97,531			$	3,339			$	94,192			$	–

Fair value measurements using significant unobservable inputs (Level 3)

		Fair value measurements using significant unobservable inputs (Level 3)
		Derivative instruments, at fair value, net
		(Thousands)
Balance at January 1, 2011		$	116,672
Total gains or losses:
Included in earnings		14
Included in other comprehensive income		11,020
Settlements		(25,734)
Transfers in and/or out of Level 3		–
Balance at June 30, 2011		$	101,972
The amount of total gains or losses for the period included in earnings attributable to the change in unrealized gains or losses relating to assets and liabilities still held as of June 30, 2011		$	–

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- Definition

This element represents 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 a description of where those gains or losses included in earnings (or changes in net assets) are reported in the statement of income (or activities); (2) purchases, sales, issuances, and settlements (net); and (3) transfers in and transfers out of Level 3 (for example, transfers due to changes in the observability of significant inputs).

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- Definition

This element represents the disclosure related to 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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