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Income Taxes
6 Months Ended
Jun. 30, 2017
Income Taxes  
Income Taxes

9. Income Taxes

Income tax expense decreased by $3.7 million, to $18.2 million for the three months ended June 30, 2017 compared to $21.9 million for the three months ended June 30, 2016. The Company’s effective tax rate (“ETR”) was 34.9% for the three months ended June 30, 2017, compared to 44.4% for the three months ended June 30, 2016.  The decrease in ETR was primarily driven by a reduction in non-cash fair value losses on common stock warrants, which are not tax effected, a decrease in non-deductible transaction costs and changes to the geographic mix of earnings.  

Income tax expense increased by $2.0 million, to $40.7 million for the six months ended June 30, 2017 compared to $38.7 million for the six months ended June 30, 2016. The Company’s ETR was 35.6% for the six months ended June 30, 2017, compared to 42.4% for the six months ended June 30, 2016. The decrease in ETR was primarily driven by a reduction in non-cash fair value losses on common stock warrants, which are not tax effected, a decrease in non-deductible transaction costs, offset by incremental tax expense associated with the settlement of vested restricted stock units and changes to the geographic mix of earnings.