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TAXES
6 Months Ended
Sep. 30, 2017
Income Tax Disclosure [Abstract]  
TAXES
TAXES
In accordance with GAAP, we estimate the full-year effective tax rate from continuing operations and apply this rate to our year-to-date income from continuing operations. In addition, we separately calculate the tax impact of unusual or infrequent items, if any. The tax impacts of such unusual or infrequent items are treated discretely in the quarter in which they occur. During the three months ended September 30, 2017 and 2016, our effective tax rate was (8.6)% and 14.8%, respectively, and (22.4)% and 9.5% during the six months ended September 30, 2017 and 2016, respectively. The effective tax rate for the three and six months ended September 30, 2017 and 2016 were both impacted by valuation allowances against future realization of foreign tax credits. For the three and six months ended September 30, 2017, our effective tax rate also includes the impact of $4.7 million of unrecognized tax benefits in certain foreign jurisdictions. Additionally, we continue to value against net operating losses in certain foreign jurisdictions.
The relationship between our provision for or benefit from income taxes and our pre-tax book income can vary significantly from period to period considering, among other factors, (a) the overall level of pre-tax book income, (b) changes in the blend of income that is taxed based on gross revenues or at high effective tax rates versus pre-tax book income or at low effective tax rates and (c) our geographical blend of pre-tax book income. Consequently, our income tax expense does not change proportionally with our pre-tax book income. Significant decreases in our pre-tax book income typically result in higher effective tax rates, while significant increases in pre-tax book income can lead to lower effective tax rates, subject to the other factors impacting income tax expense noted above. The increase in our effective tax rate excluding discrete items for the three months ended September 30, 2017 compared to the three months ended September 30, 2016 primarily related to an increase in the blend of earnings taxed in relatively high taxed jurisdictions versus low taxed jurisdictions. Additionally, we increased our valuation allowance by $0.2 million and $2.5 million for the three months ended September 30, 2017 and 2016, respectively, and $11.3 million and $15.7 million for the six months ended September 30, 2017 and 2016, respectively, which also increased our effective tax rate.
As of September 30, 2017, there were $6.0 million of unrecognized tax benefits, all of which would have an impact on our effective tax rate if recognized.