Income taxes	3 Months Ended
Mar. 31, 2018
Income Tax Disclosure [Abstract]
Income taxes	13. Income taxes For the three months ended March 31, 2018, the Company’s income tax expense was $943, compared to $623 for the prior year period. The increase in the income tax provision for the three months ended March 31, 2018 primarily related to a change in the geographical mix of income which increased taxable non-U.S. earnings before income taxes when compared to the prior year period. This increase was partially offset by lower deferred tax expense in the current period related to the impact of the Tax Cuts and Jobs Act to the amortization of tax goodwill. As of March 31, 2018 and December 31, 2017, the Company maintained a valuation allowance against its net deferred tax assets primarily attributable to operations in the United States, as the realization of such assets was not considered more likely than not. There were no changes to the Company’s unrecognized tax benefits during the three months ended March 31, 2018. The Company does not expect any significant changes to its unrecognized tax positions during the next twelve months. The Company recognizes interest and penalties related to uncertain tax positions in income tax expense. No interest and penalties related to uncertain tax positions were recognized during the three months ended March 31, 2018. The Company has not finalized its computations associated with the U.S. Tax Cuts and Jobs Act of 2017. The Company has not adjusted any of its provisional estimates for the three months ended March 31, 2018. The Company continues to evaluate its provisional estimates and does not expect any cash tax payments for the transition tax.

13. Income taxes

For the three months ended March 31, 2018, the Company’s income tax expense was $943, compared to $623 for the prior year period. The increase in the income tax provision for the three months ended March 31, 2018 primarily related to a change in the geographical mix of income which increased taxable non-U.S. earnings before income taxes when compared to the prior year period. This increase was partially offset by lower deferred tax expense in the current period related to the impact of the Tax Cuts and Jobs Act to the amortization of tax goodwill.

As of March 31, 2018 and December 31, 2017, the Company maintained a valuation allowance against its net deferred tax assets primarily attributable to operations in the United States, as the realization of such assets was not considered more likely than not.

There were no changes to the Company’s unrecognized tax benefits during the three months ended March 31, 2018. The Company does not expect any significant changes to its unrecognized tax positions during the next twelve months.

The Company recognizes interest and penalties related to uncertain tax positions in income tax expense. No interest and penalties related to uncertain tax positions were recognized during the three months ended March 31, 2018.

The Company has not finalized its computations associated with the U.S. Tax Cuts and Jobs Act of 2017. The Company has not adjusted any of its provisional estimates for the three months ended March 31, 2018. The Company continues to evaluate its provisional estimates and does not expect any cash tax payments for the transition tax.