Net Income Per Share (Tables)

6 Months Ended

Jun. 30, 2012

Calculation of Net Income Per Share

The calculation of net income per share for the three and six months ended June 30, 2012 and 2011 is reflected in the following table (in thousands, except per share amounts):

	Three Months Ended June 30,				Six Months Ended June 30,
	2012		2011		2012		2011
Basic net income per share:
Net income	$	45,329	$	36,425	$	93,663	$	63,130
Income allocated to participating securities—basic		228		537		494		939
Net income available to common stockholders—basic	$	45,101	$	35,888	$	93,169	$	62,191
Basic weighted average shares		138,588		141,286		138,986		141,966
Basic net income per share	$	.33	$	.25	$	.67	$	.44
Diluted net income per share:
Net income	$	45,329	$	36,425	$	93,663	$	63,130
Income allocated to participating securities—diluted		228		535		492		936
Net income available to common stockholders—diluted	$	45,101	$	35,890	$	93,171	$	62,194
Basic weighted average shares		138,588		141,286		138,986		141,966
Dilutive effect of potential common shares		1,151		1,299		1,050		1,391
Diluted weighted average shares		139,739		142,585		140,036		143,357
Diluted net income per share	$	.32	$	.25	$	.67	$	.43

Weighted Average Diluted Common Shares Outstanding

The weighted average diluted common shares outstanding for the three and six months ended June 30, 2012 and 2011, excludes the effect of the following (in thousands):

	Three Months Ended June 30,				Six Months Ended June 30,
	2012		2011		2012		2011
Total number of anti-dilutive potential common shares		239		803		233		664