Income tax provision (Tables)

3 Months Ended

Mar. 31, 2020

Income Tax Disclosure [Abstract]

Effective income tax rate reconciliation

The effective tax rate on pretax (loss) income reconciles to the U.S. federal statutory tax rate as follows:

	Quarter Ended March 31, 2020		Year Ended December 31, 2019
Income tax at federal statutory rate	21.0	%	21.0	%
Goodwill impairment charges	(18.8	%)	(29.3	%)
Change in valuation allowances	—		(4.5	%)
Net tax impact of share-based compensation	(0.9	%)	(1.1	%)
Foreign tax rate differences	3.9	%	1.3	%
State income tax expense, net of federal income tax benefit	2.2	%	4.9	%
Other	(2.3	%)	—
Effective tax rate	5.1	%	(7.7	%)