Fair Value Measurements (Tables)

9 Months Ended

Sep. 30, 2011

Fair Value Measurements [Abstract]

Recurring Fair Value Measurements

	Fair Value as of September 30, 2011
	Level 1		Level 2		Level 3		Total
	(In thousands)
Assets:
Short-term investments:
Available-for-sale equity securities — energy industry	$	56,654	$	—	$	—	$	56,654
Available-for-sale debt securities
Commercial paper and CDs		1,160		—		—		1,160
Corporate debt securities		—		44,600		—		44,600
Mortgage-backed debt securities		—		367		—		367
Mortgage-CMO debt securities		—		2,797		—		2,797
Asset-backed debt securities		2,705		—		—		2,705
Trading securities — energy industry		11,576		—		—		11,576
Total short-term investments	$	72,095	$	47,764	$	—	$	119,859
Liabilities:
Derivative contract	$	—	$	1,900	$	—	$	1,900

Fair Value of Financial Instruments

	September 30, 2011				December 31, 2010
	Carrying Value		Fair Value		Carrying Value		Fair Value
	(In thousands)
5.375% senior notes due August 2012(1)	$	274,448	$	284,952	$	273,977	$	291,500
6.15% senior notes due February 2018		967,186		1,078,984		966,276		1,041,008
9.25% senior notes due January 2019		1,125,000		1,438,864		1,125,000		1,393,943
5.00% senior notes due September 2020		697,266		721,070		697,037		678,335
4.625% senior notes due September 2021		697,607		687,253		—		—
0.94% senior exchangeable notes due May 2011		—		—		1,378,178		1,403,315
Subsidiary preferred stock		69,188		68,625		69,188		68,625
Revolving credit facilities		600,000		600,000		—		—
Other		1,853		1,853		2,676		2,676
	$	4,432,548	$	4,881,601	$	4,512,332	$	4,879,402

(1) Includes $.4 million and $.7 million as of September 30, 2011 and December 31, 2010, respectively, related to the unamortized loss on an interest rate swap that was unwound during the fourth quarter of 2005.