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Income taxes | 6 Months Ended
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Jun. 30, 2018
Income Tax Disclosure [Abstract] |
Income taxes | 11. Income taxes Income tax provisions for interim periods are based on an estimated annual income tax rate, adjusted for discrete tax items. As a result, the Company’s interim effective tax rates may vary significantly from the statutory tax rate and the annual effective tax rate. For the three months ended June 30, 2018 and 2017, the effective tax rate on continuing operations was 53.8% and 45.3%, respectively. For the six months ended June 30, 2018 and 2017, the effective tax rate on continuing operations was 51.2% and 76.4%, respectively. The primary factors affecting the Company’s effective tax rate for the three and six months ended June 30, 2018, were the lower U.S. statutory tax rate enacted in December 2017, the mix of earnings among tax jurisdictions, and current period losses in certain jurisdictions for which the Company does not currently receive a tax benefit. During the first quarter of 2018, the Internal Revenue Service concluded an examination of the Company’s federal income tax return for 2012 with no material impact on the financial statements. In November 2017, the Company was notified of an examination of its federal income tax return for 2015. The Company cannot reasonably determine if this examination, or any state and local tax examinations, will have a material impact on its financial statements and cannot predict the timing regarding resolution of these tax examinations. The Company believes it is reasonably possible that, in the next 12 months, the amount of unrecognized tax benefits related to the resolution of federal, state and foreign matters could be reduced by $2.1 million to $4.1 million as audits close and statutes expire. In the fourth quarter of 2017, the Company recorded tax expense of $8.3 million that represents what it believes is the impact of the enactment of the Tax Act. The expense was based on currently available information and interpretations, which are continuing to evolve, and as a result, the expense is considered provisional. The Company has continued to analyze additional information and guidance related to the Tax Act as supplemental legislation, regulatory guidance, or evolving technical interpretations become available. Based on supplemental legislation issued during 2018, the Company recorded a tax benefit of $0.5 million during the three and six months ended June 30, 2018, respectively. The Company will continue to refine such amounts within the measurement period as provided by Staff Accounting Bulletin No. 118 and expects to complete its analysis no later than the fourth quarter of 2018.

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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://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -URI http://asc.fasb.org/topic&trid=2144680 + Details
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