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Income Taxes
6 Months Ended
Jun. 30, 2013
Income Taxes [Abstract]  
Income Tax Disclosure [Text Block]
Income Taxes

The effective tax rates of income attributable to VCA for the three and six months ended June 30, 2013 were 39.0% and 38.8%, respectively, as compared to the three and six months ended June 30, 2012, of 38.5% and 37.0%, respectively. The increase in the effective rate for the six months ended June 30, 2013 was in part, due to a non-taxable gain of $5.7 million in the prior year related to the increase in value of our historic noncontrolling interest in AVC, realized upon the acquisition of the remaining equity interest.