Income taxes	6 Months Ended
Jun. 30, 2018
Income Tax Disclosure [Abstract]
Income taxes	Income taxes As of June 30, 2018, the Company’s total liability for unrecognized tax benefits relating to tax positions that do not meet the more-likely-than-not threshold was $39,966, of which $37,123 would impact the Company's effective tax rate if recognized. The total balance increased $7,190 from the December 31, 2017 balance of $32,776. The Company recognizes accrued interest and penalties related to unrecognized tax benefits in its income tax expense. At June 30, 2018 and December 31, 2017, the Company had approximately $6,642 and $4,195, respectively, accrued for interest and penalties related to unrecognized tax benefits, net of federal tax benefits. The Company performed a provisional analysis of the Tax Cuts and Jobs Act of 2017 (2017 Tax Act) and recorded a reasonable estimate at December 31, 2017. The Company is in the process of completing its analysis with regards to the 2017 Tax Act and will record any adjustments to its estimate on or before December 22, 2018, with any adjustments to be recorded to income tax expense in the period when the adjustments are determined. As of June 30, 2018, the Company has not made any material adjustments to the December 31, 2017 estimates.

Income taxes

As of June 30, 2018, the Company’s total liability for unrecognized tax benefits relating to tax positions that do not meet the more-likely-than-not threshold was $39,966, of which $37,123 would impact the Company's effective tax rate if recognized. The total balance increased $7,190 from the December 31, 2017 balance of $32,776.

The Company recognizes accrued interest and penalties related to unrecognized tax benefits in its income tax expense. At June 30, 2018 and December 31, 2017, the Company had approximately $6,642 and $4,195, respectively, accrued for interest and penalties related to unrecognized tax benefits, net of federal tax benefits.

The Company performed a provisional analysis of the Tax Cuts and Jobs Act of 2017 (2017 Tax Act) and recorded a reasonable estimate at December 31, 2017. The Company is in the process of completing its analysis with regards to the 2017 Tax Act and will record any adjustments to its estimate on or before December 22, 2018, with any adjustments to be recorded to income tax expense in the period when the adjustments are determined. As of June 30, 2018, the Company has not made any material adjustments to the December 31, 2017 estimates.