Calculation of Earnings per Share

6 Months Ended

Jun. 30, 2014

Earnings Per Share [Abstract]

Calculation of Earnings per Share

Calculation of Earnings per Share

Basic earnings per share is calculated by dividing net income by the weighted-average number of shares outstanding during the period. Diluted earnings per share is calculated by dividing net income attributable to VCA Inc. by the weighted-average number of common shares outstanding, after giving effect to all dilutive potential common shares outstanding during the period. Basic and diluted earnings per share were calculated as follows (in thousands, except per share amounts):

	Three Months Ended June 30,				Six Months Ended June 30,
	2014		2013		2014		2013
Net income attributable to VCA Inc.	$	45,584	$	41,662	$	79,627	$	72,147
Weighted-average common shares outstanding:
Basic	88,041		88,509		88,188		88,455
Effect of dilutive potential common shares:
Stock options	265		321		260		298
Nonvested shares and units	885		823		864		778
Diluted	89,191		89,653		89,312		89,531
Basic earnings per share	$	0.52	$	0.47	$	0.90	$	0.82
Diluted earnings per share	$	0.51	$	0.46	$	0.89	$	0.81

There were no potential common shares excluded from the computation of diluted earnings per share for the three months ended June 30, 2014. For the three months ended June 30, 2013, potential common shares of 12,909 were excluded from the computation of diluted earnings per share because their inclusion would have had an antidilutive effect.

There were no potential common shares excluded from the computation of diluted earnings per share for the six months ended June 30, 2014. For the six months ended June 30, 2013, potential common shares of 26,987 were excluded from the computation of diluted earnings per share because their inclusion would have had an antidilutive effect.