Stockholders’ Equity and EPS

EPS

Basic EPS is the amount of earnings available to each share of common stock outstanding during the reporting period. Diluted EPS is the amount of earnings available to each share of common stock outstanding during the reporting period adjusted to include the effect of potentially dilutive common shares. Potentially dilutive common shares include incremental shares issued for stock options and restricted stock units outstanding under our equity incentive plans and our ESPP. Potentially dilutive common shares are excluded from the computation of dilutive EPS in periods in which the effect would be antidilutive. The following is a reconciliation of basic EPS to diluted EPS for the three months ended March 31, 2013 and 2012:



	Three months ended March 31,
(Dollars and shares in thousands, except per share amounts)	2013		2012
Numerator:
Net income available to common stockholders	$	40,891	$	34,790
Denominator:
Weighted average common shares outstanding-basic	44,802		43,780
Weighted average effect of dilutive securities:
Stock options and ESPP	402		501
Restricted stock units	189		179
Denominator for diluted calculation	45,393		44,460
Earnings per common share:
Basic	$	0.91	$	0.79
Diluted	$	0.90	$	0.78

The following table summarizes the weighted-average common shares excluded from the diluted EPS calculation as they were deemed to be antidilutive for the three months ended March 31, 2013 and 2012:



	Three months ended March 31,
(Shares in thousands)	2013	2012
Stock options	708	121
Restricted stock units	—	1
Total	708	122