Fair Value Measurements (Tables)

9 Months Ended

Sep. 30, 2011

Fair Value Summary of Long-Term Debt with Fixed Interest Rates

The following table summarizes the fair value of our long-term debt with fixed interest rates, which is estimated based on the published market prices for the same or similar issues as of the periods presented:

	September 30, 2011				December 31, 2010
	Fair		Carrying		Fair		Carrying
	Value		Value		Value		Value
Senior Notes due 2016	$	315,000	$	293,281	$	335,712	$	292,487
Senior Notes due 2019		279,000		300,000		-		-
Convertible Notes		4,995		4,702		225,975		214,049
	$	598,995	$	597,983	$	561,687	$	506,536

Assets and Liabilities Measured at Fair Value on a Recurring Basis

The following tables summarize the valuation of those assets and liabilities as of the periods presented:

	September 30, 2011
	Fair Value			Fair Value Measurement Classification
Description	Measurement			Level 1			Level 2		Level 3
Assets:
Publicly traded equity securities	$	3,674		$	3,674		$	-	$	-
Commodity derivative assets - current		18,336			-			18,336		-
Commodity derivative assets - noncurrent		1,508			-			1,508		-

Liabilities:
Deferred compensation - noncurrent liability		(3,802	)		(3,802	)		-		-
Commodity derivative liabilities - current		-			-			-		-
Totals	$	19,716		$	(128	)	$	19,844	$	-

	December 31, 2010
	Fair Value			Fair Value Measurement Classification
Description	Measurement			Level 1			Level 2			Level 3
Assets:
Publicly traded equity securities	$	6,440		$	6,440		$	-		$	-
Interest rate swap assets - current		1,743			-			1,743			-
Interest rate swap assets - noncurrent		847			-			847			-
Commodity derivative assets - current		15,075			-			15,075			-
Commodity derivative assets - noncurrent		3,042			-			3,042			-

Liabilities:
Deferred compensation - noncurrent liability		(6,948	)		(6,948	)		-			-
Commodity derivative liabilities - current		(388	)		-			(388	)		-
Totals	$	19,811		$	(508	)	$	20,319		$	-

- 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

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-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 6: http://www.xbrl.org/2003/role/presentationRef

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-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 12: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Statement of Financial Accounting Standard (FAS)

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-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.

+ Details