Earnings Per Share (Tables)

12 Months Ended

Dec. 31, 2012

Computations of Basic and Diluted Net Earnings Per Share

The computations of basic and diluted net earnings per share are as follows (in thousands, except per share data):

	2012		2011		2010
Basic net earnings per share:
Basic net earnings	$	504,619	$	778,188	$	134,092
Earnings allocated to participating securities		(1,713)		(2,653)		(1,823)
Net earnings available to common stockholders	$	502,906	$	775,535	$	132,269
Average shares outstanding		318,172		316,997		315,962
Basic net earnings per share		$1.58		$2.45		$0.42
Diluted net earnings per share:
Diluted net earnings	$	504,619	$	778,188	$	134,092
Earnings allocated to participating securities		(1,714)		(2,654)		(1,823)
Net earnings available to common stockholders	$	502,905	$	775,534	$	132,269
Diluted average shares outstanding:
Basic shares outstanding		318,172		316,997		315,962
Dilutive effect of stock options and other		68		164		548
		318,240		317,161		316,510
Diluted net earnings per share		$1.58		$2.45		$0.42

Anti-Dilutive Stock Options

The following stock options were excluded from the computation of diluted net earnings per share because their effect would have been anti-dilutive (shares in thousands):

	2012		2011		2010
Anti-dilutive stock options:
Weighted average shares		801		801		242
Weighted average exercise price	$	42.07	$	42.07	$	41.43