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Income Taxes
6 Months Ended
Jun. 30, 2013
Income Taxes [Abstract]  
Income Taxes
8.Income Taxes

The effective income tax rates for the quarters ended June 30, 2013 and 2012 were 27.7% and 30.1%, respectively. For the six months ended June 30, 2013 and 2012, the effective income tax rates were 30.0% and 30.7%, respectively. The effective tax rates in both 2013 and 2012 were reduced by changes in estimates associated with the finalization of prior year foreign and domestic tax items, including the reversal of valuation allowances related to tax loss carryovers. The 2013 rates in the three- and six-month periods include the impact of the restructuring costs.