Earnings Per Share (Tables)

9 Months Ended

Sep. 30, 2011

Earnings Per Share [Abstract]

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

	Three Months Ended				Nine Months Ended
	September 30,				September 30,
	2011		2010		2011		2010
	(In thousands, except per share data)
Net income — basic (numerator):	$	256,854	$	198,524	$	774,052	$	713,770
Effect of dilutive potential shares Convertible debentures		—		—		—		56
Net income including conversions — diluted (numerator)	$	256,854	$	198,524	$	774,052	$	713,826
Weighted average shares — basic (denominator):		139,027		139,027		139,027		139,026
Effect of dilutive potential shares Convertible debentures		—		—		—		28
Stock options and stock appreciation rights.		14		10		21		27
Weighted average shares including conversions — diluted (denominator)		139,041		139,037		139,048		139,081
Earnings per share:
Basic	$	1.85	$	1.43	$	5.57	$	5.13
Diluted	$	1.85	$	1.43	$	5.57	$	5.13

Securities excluded from computation of diluted earning per share

	Three Months Ended				Nine Months Ended
	September 30,				September 30,
	2011		2010		2011		2010
	(In thousands)
Employee and director:
Stock options		19		19		10		9
Stock appreciation rights		815		621		719		579