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Income Taxes
3 Months Ended
Mar. 31, 2013
Income Tax Disclosure [Abstract]  
Income Taxes
Income Taxes
 
Our consolidated effective income tax rate for the three-month period ended March 31, 2013 of 13.9% included the impact of various discrete tax items, the majority of which was attributable to the recognition of a liability for unrecognized tax benefits of $4.9 million associated with a tax position taken in prior years. Excluding the impact of the aforementioned discrete tax items, our consolidated effective income tax rate for the three-month period ended March 31, 2013 was 12.2%, which is equivalent to the consolidated effective income tax rate, excluding discrete tax items, of 12.2% for the three-month period ended March 31, 2012.