Income Taxes

3 Months Ended

Mar. 31, 2019

Income Tax Disclosure [Abstract]

Income taxes

3. Income taxes

Our estimated annual effective tax rate is about 16%, which does not include discrete tax items. This differs from the 21% statutory corporate tax rate due to the effect of U.S. tax benefits.

Provision for income taxes is based on the following:

	For Three Months Ended
	March 31,
	2019			2018
Taxes calculated using the estimated annual effective tax rate	$	220		$	316
Discrete tax items		(60	)		(129	)
Provision for income taxes	$	160		$	187
Actual effective tax rate		12	%		12	%