Income Taxes (Tables)

3 Months Ended

Mar. 31, 2018

Income Tax Disclosure [Abstract]

Schedule of differences between U.S. statutory rate and effective rate

The primary differences between the U.S. statutory rate and our effective rate are as follows: 

	Three Months Ended March 31,
	2018		2017
U.S. statutory rate	21.0	%	35.0	%
Foreign provision	(19.1	)	(11.1	)
Other	(5.4	)	(2.0	)
Effective rate	(3.5	)%	21.9	%