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Income Taxes | 9 Months Ended
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Sep. 30, 2017
Income Tax Disclosure [Abstract] |
Income Taxes | 8. INCOME TAXES The determination of the annual effective tax is based upon a number of significant estimates and judgments, including the estimated annual pretax income in each tax jurisdiction in which we operate and the ongoing development of tax planning strategies during the year. In addition, our provision for income taxes can be impacted by changes in tax rates or laws, the finalization of tax audits and reviews, as well as other factors that cannot be predicted with certainty. As such, there can be significant volatility in interim tax provisions. The following is a summary of our provision for income taxes and effective tax rate from continuing operations (dollars in thousands):
|  | For the Quarter Ended September 30, |  |  | For the Year to Date Ended September 30, |
|  | 2017 |  |  | 2016 |  |  | 2017 |  |  | 2016 |
Pretax income (loss) |  | $ | 5,095 |  |  | $ | (479 | ) |  | $ | 24,901 |  |  | $ | 23,990 |
Provision for income taxes |  | $ | 1,597 |  |  | $ | 21 |  |  | $ | 11,143 |  |  | $ | 8,776 |
Effective rate |  |  | 31.3 | % |  |  | 4.4 | % |  |  | 44.7 | % |  |  | 36.6 | %
As of December 31, 2016, a valuation allowance of $49.7 million was maintained with respect to our foreign tax credits, separate state net operating losses and Illinois edge credits. After considering both positive and negative evidence related to the realization of these deferred tax assets, we have determined that it is necessary to continue to record the valuation allowance against these credits and separate state net operating losses as of September 30, 2017. The effective tax rate for the quarter and year to date ended September 30, 2017, was primarily impacted by tax reserves and the tax effect of expenses that are not deductible for tax purposes. For the current quarter we recognized less than $0.1 million of benefit associated with the adoption of ASU 2016-09, Compensation – Stock Compensation (Topic 718), improvements to Employee Share-Based Payment Accounting, which decreased our quarterly effective tax rate by 0.6%. For the year to date ended September 30, 2017, we recognized a $1.1 million unfavorable adjustment associated with the adoption of ASU 2016-09, which increased the effective tax rate by 4.6%. For the year to date ended September 30, 2016, the effective tax rate includes a $2.1 million favorable tax adjustment related to the closure of a federal tax audit for the tax years 2013 and 2014. The effect of this discrete item was to decrease the year to date effective tax rate by 8.8%. We estimate that it is reasonably possible that the gross liability for unrecognized tax benefits for a variety of uncertain tax positions will decrease by up to $1.8 million in the next twelve months as a result of the completion of various tax audits currently in process and the expiration of the statute of limitations in several jurisdictions. The income tax rate for the quarter and year to date ended September 30, 2017 does not take into account the possible reduction of the liability for unrecognized tax benefits. The impact of a reduction to the liability will be treated as a discrete item in the period the reduction occurs. We recognize interest and penalties related to unrecognized tax benefits in tax expense. As of September 30, 2017, we had accrued $1.9 million as an estimate for reasonably possible interest and accrued penalties. Our tax returns are routinely examined by federal, state, local and foreign tax authorities and these audits are at various stages of completion at any given time. The Internal Revenue Service has completed its examination of our U.S. income tax returns through our tax year ended December 31, 2014.

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- Definition The entire disclosure for income taxes. Disclosures may include net deferred tax liability or asset recognized in an enterprise's statement of financial position, net change during the year in the total valuation allowance, approximate tax effect of each type of temporary difference and carryforward that gives rise to a significant portion of deferred tax liabilities and deferred tax assets, utilization of a tax carryback, and tax uncertainties information. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -URI http://asc.fasb.org/topic&trid=2144680 + Details
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