FAIR VALUE MEASUREMENTS (Tables)

6 Months Ended

Jun. 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)		June 30, 2013
Assets
Deferred compensation plan	$	11,416	$	—	$	—	$	11,416
Derivative instruments	—		3,729		83,878		87,607
Total assets	$	11,416	$	3,729	$	83,878	$	99,023
Liabilities
Deferred compensation plan	$	30,385	$	—	$	—	$	30,385
Derivative instruments	—		—		—		—
Total liabilities	$	30,385	$	—	$	—	$	30,385

(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						Six Months Ended
	June 30,						June 30,
(In thousands)	2013			2012			2013			2012
Balance at beginning of period	$	(29,899	)	$	218,942		$	41,159		$	195,127
Total gains / (losses) (realized or unrealized):
Included in earnings (1)	(272		)	69,390			13,056			126,428
Included in other comprehensive income	113,777			(90,234		)	42,719			(67,541		)
Settlements	272			(68,885		)	(13,056		)	(125,186		)
Transfers in and/or out of level 3	—			—			—			385
Balance at end of period	$	83,878		$	129,213		$	83,878		$	129,213

(1)       There were no unrealized gains or losses for the three and six months ended June 30, 2013. Unrealized losses of $0.3 million for the three and six months ended June 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

	June 30, 2013						December 31, 2012
(In thousands)	Carrying Amount			Estimated Fair Value			Carrying Amount			Estimated Fair Value
Total debt	$	1,142,000		$	1,235,176		$	1,087,000		$	1,213,474
Current maturities	(75,000		)	(75,301		)	(75,000		)	(77,175		)
Long-term debt, excluding current maturities	$	1,067,000		$	1,159,875		$	1,012,000		$	1,136,299