Earnings Per Share (Tables)

6 Months Ended

Jun. 30, 2011

Earnings Per Share [Abstract]

Reconciliation of the numerators and the denominators of basic and diluted per-share computations

	Three Months Ended				Six Months Ended
	June 30,				June 30,
	2011		2010		2011		2010
	(In thousands, except per share data)
Net income — basic (numerator):	$	266,586	$	224,393	$	517,198	$	515,246
Effect of dilutive potential shares
Convertible debentures		—		32		—		56
Net income including conversions — diluted (numerator)	$	266,586	$	224,425	$	517,198	$	515,302
Weighted average shares — basic (denominator):		139,027		139,026		139,027		139,026
Effect of dilutive potential shares
Convertible debentures		—		32		—		42
Stock options and stock appreciation rights		25		21		25		36
Weighted average shares including conversions — diluted (denominator)		139,052		139,079		139,052		139,104
Earnings per share:
Basic	$	1.92	$	1.61	$	3.72	$	3.71
Diluted	$	1.92	$	1.61	$	3.72	$	3.70

Securities excluded from computation of diluted earning per share

	Three Months Ended				Six Months Ended
	June 30,				June 30,
	2011		2010		2011		2010
			(In thousands)
Employee and director:
Stock options		8		8		8		4
Stock appreciation rights		693		672		669		557