Income taxes	3 Months Ended
Mar. 31, 2017
Income Tax Disclosure [Abstract]
Income taxes	10. 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 March 31, 2017 and 2016, the effective tax rate on continuing operations was 242.8% and 48.4%, respectively. The primary factors affecting the Company’s effective tax rate for the three months ended March 31, 2017, were the method for estimating income taxes at interim periods, 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. The Internal Revenue Service is currently conducting examinations of the Company’s federal income tax returns for 2012 and 2013. The Company cannot reasonably determine if these examinations will have a material impact on its financial statements and cannot predict the timing regarding resolution of these tax examinations.

Income taxes

3 Months Ended

Mar. 31, 2017

10. 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 March 31, 2017 and 2016, the effective tax rate on continuing operations was 242.8% and 48.4%, respectively. The primary factors affecting the Company’s effective tax rate for the three months ended March 31, 2017, were the method for estimating income taxes at interim periods, 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.

The Internal Revenue Service is currently conducting examinations of the Company’s federal income tax returns for 2012 and 2013. The Company cannot reasonably determine if these examinations will have a material impact on its financial statements and cannot predict the timing regarding resolution of these tax examinations.