Earnings Per Share (Tables)

9 Months Ended

Sep. 30, 2012

Earnings Per Share

Reconciliation Between Basic and Diluted Earnings Per Share

			Quarter Ended				Nine Months Ended
			September 30,							September 30,
	2012			2011			2012				2011
Net income for basic and diluted earnings per share	$ 367,779			$ 398,958			$ 411,090				$	570,859
Weighted-average common shares outstanding	217,940			217,105			217,797				216,883
Dilutive effect of stock options and restricted stock awards			1,356	1,829			1,466				2,432
Diluted weighted-average shares outstanding			219,296			218,934		219,263					219,315
Basic earnings per share	$	1.69		$	1.84		$		1.89		$			2.63
Diluted earnings per share	$	1.68		$	1.82		$		1.87		$			2.60