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Income Tax Expense
6 Months Ended
Jun. 30, 2014
Income Tax Disclosure [Abstract]  
Income Tax Expense
INCOME TAX EXPENSE

The effective tax rates for the three months ended June 30, 2014 and 2013 were 21.2% and 24.7%, respectively. The effective tax rates for the six months ended June 30, 2014 and 2013 were 22.6% and 25.4%, respectively. The change in tax expense is primarily the result of several items discrete to each quarter along with changes in activity levels among jurisdictions with different tax rates.