FAIR VALUE MEASUREMENTS (Tables)

3 Months Ended

Mar. 31, 2013

Fair Value Hierarchy Table for Assets and Liabilities Measured at Fair Value

	Fair Value Measurements at March31, 2013 using:
	QuotedPrices in Active Markets for IdenticalAssets (Level 1)	Significant Other Observable Inputs (Level 2)	Significant Unobservable Inputs (Level 3)	Total Carrying Valueasof March31, 2013
Trading securities held in the deferred compensation plans	$71,440	$ —	$—	$71,440
Derivatives–swaps	—	(27,880)	—	(27,880)
–collars	—	27,287	—	27,287

	Fair Value Measurements at December31, 2012 using:
	Quoted Prices in Active Markets for IdenticalAssets (Level 1)	Significant Other Observable Inputs (Level 2)	Significant Unobservable Inputs (Level 3)	Total Carrying Value as of December31, 2012
Trading securities held in the deferred compensation plans	$57,776	$ —	$—	$57,776
Derivatives–swaps	—	23,326	—	23,326
–collars	—	121,014	—	121,014
–basis swaps	—	993	—	993

Carrying Amounts and Fair Values of Financial Instruments

Fair Values—Reported

The following table presents the carrying amounts and the fair values of our financial instruments as of March31, 2013 and December31, 2012 (in thousands):

	March31, 2013		December31, 2012
	Carrying Value	Fair Value	Carrying Value	Fair Value
Assets:
Commodity swaps and collars	$27,439	$27,439	$153,267	$153,267
Marketable securities(a)	71,440	71,440	57,776	57,776
(Liabilities):
Commodity swaps and collars	(28,032)	(28,032)	(7,934)	(7,934)
Bank credit facility(b)	(47,000)	(47,000)	(739,000)	(739,000)
Deferred compensation plan	(222,700)	(222,700)	(187,604)	(187,604)
7.25% senior subordinated notes due 2018(b)	(250,000)	(260,000)	(250,000)	(262,500)
8.00% senior subordinated notes due 2019(b)	(289,505)	(328,500)	(289,185)	(332,250)
6.75% senior subordinated notes due 2020(b)	(500,000)	(550,000)	(500,000)	(542,500)
5.75% senior subordinated notes due 2021(b)	(500,000)	(536,250)	(500,000)	(535,000)
5.00% senior subordinated notes due 2022(b)	(600,000)	(613,500)	(600,000)	(627,000)
5.00% senior subordinated notes due 2023(b)	(750,000)	(766,875)	—	—

(a)Marketable securities, which are held in our deferred compensation plans, are actively traded on major exchanges. Refer to Note 13 for additional

information.

(b)The book value of our bank debt approximates fair value because of its floating rate structure. The fair value of our senior subordinated notes is basedon end of period market quotes which are Level 2 market values. Refer to Note 8 for additional information.