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Income Tax Expense
3 Months Ended
Mar. 31, 2014
Income Tax Disclosure [Abstract]  
Income Tax Expense
INCOME TAX EXPENSE

The effective tax rates for the three months ended March 31, 2014 and 2013 were 24.0% and 26.1%, respectively. The change in tax expense primarily reflects the change in items discrete to the quarters and the change in activity levels among jurisdictions with different tax rates.