FAIR VALUE MEASUREMENTS (Tables)

9 Months Ended

Sep. 30, 2013

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)		September 30, 2013
Assets
Deferred compensation plan	$	11,865	$	—	$	—	$	11,865
Derivative instruments	—		93		65,446		65,539
Total assets	$	11,865	$	93	$	65,446	$	77,404
Liabilities
Deferred compensation plan	$	31,800	$	—	$	—	$	31,800
Total liabilities	$	31,800	$	—	$	—	$	31,800

(In thousands)	Quoted Prices in Active Markets for Identical Assets (Level 1)		Significant Other Observable Inputs (Level 2)		Significant Unobservable Inputs (Level 3)		December 31, 2012
Assets
Deferred compensation plan	$	10,608	$	—	$	—	$	10,608
Derivative instruments	—		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 instruments	—		—		192		192
Total liabilities	$	23,893	$	—	$	192	$	24,085

Fair Value of Financial Assets and Liabilities Classified as Level 3

	Three Months Ended						Nine Months Ended
	September 30,						September 30,
(In thousands)	2013			2012			2013			2012
Balance at beginning of period	$	83,878		$	129,213		$	41,159		$	195,127
Total gains / (losses) (realized or unrealized):
Included in earnings (1)	20,766			56,990			33,822			183,418
Included in other comprehensive income	(18,432		)	(85,466		)	24,287			(153,008		)
Settlements	(20,766		)	(55,915		)	(33,822		)	(181,100		)
Transfers in and/or out of level 3	—			—			—			385
Balance at end of period	$	65,446		$	44,822		$	65,446		$	44,822

(1) There were no unrealized gains or losses for the three and nine months ended September 30, 2013. Unrealized losses of $0.1 million and $0.4 million for the three and nine months ended September 30, 2012, respectively, were included in natural gas revenues in the Condensed Consolidated Statement of Operations.

Carrying amounts and fair values of long-term debt

	September 30, 2013				December 31, 2012
(In thousands)	Carrying Amount		Estimated Fair Value		Carrying Amount			Estimated Fair Value
Total debt	$	1,162,000	$	1,258,627	$	1,087,000		$	1,213,474
Current maturities	—		—		(75,000		)	(77,175		)
Long-term debt, excluding current maturities	$	1,162,000	$	1,258,627	$	1,012,000		$	1,136,299