Calculation of Earnings Per Share (Tables)

6 Months Ended

Jun. 30, 2011

Calculation of Earnings per Share [Abstract]

Calculation of Basic and Diluted Earnings per Share

	Three Months Ended				Six Months Ended
	June 30,				June 30,
	2011		2010		2011		2010
Net income attributable to VCA Antech, Inc	$	39,612	$	29,404	$	68,451	$	61,339
Weighted-average common shares outstanding:
Basic		86,535		86,041		86,445		85,933
Effect of dilutive potential common shares:
Stock options		647		951		664		943
Nonvested shares		122		186		194		193
Diluted		87,304		87,178		87,303		87,069
Basic earnings per share	$	0.46	$	0.34	$	0.79	$	0.71
Diluted earnings per share	$	0.45	$	0.34	$	0.78	$	0.70