Net Income Per Share (Tables)

3 Months Ended

Mar. 31, 2013

Calculation of Net Income Per Share

The calculation of net income per share for the three months ended March 31, 2013 and 2012 is reflected in the following table (in thousands, except per share amounts):

	Three Months Ended March 31,
	2013		2012
Basic net income per share:
Net income	$	55,863	$	48,334
Income allocated to participating securities—basic		2		265
Net income available to common stockholders—basic	$	55,861	$	48,069
Basic weighted average shares		137,311		139,384
Basic net income per share	$	.41	$	.34
Diluted net income per share:
Net income	$	55,863	$	48,334
Income allocated to participating securities—diluted		2		264
Net income available to common stockholders—diluted	$	55,861	$	48,070
Basic weighted average shares		137,311		139,384
Dilutive effect of potential common shares		1,083		1,059
Diluted weighted average shares		138,394		140,433
Diluted net income per share	$	.40	$	.34

Weighted Average Diluted Common Shares Outstanding

The weighted average diluted common shares outstanding for the three months ended March 31, 2013 and 2012, excludes the effect of the following (in thousands):

	Three Months Ended March 31,
	2013		2012
Total number of anti-dilutive potential common shares		—		752