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Income Taxes
6 Months Ended
Jun. 30, 2015
Income Tax Disclosure [Abstract]  
Income Taxes

2. INCOME TAXES

Our effective tax rate increased from 34.2% in the six months ended June 30, 2014 to 39.1% in the six months ended June 30, 2015. The increase in the effective tax rate between the two periods is primarily attributable to the release of a valuation allowance attributable to a foreign subsidiary in 2014.