Income Taxes (Tables)

6 Months Ended

Jun. 30, 2018

Income Tax Disclosure [Abstract]

Provision for income taxes

Provision for income taxes is based on the following:

	For Three Months Ended						For Six Months Ended
	June 30,						June 30,
	2018			2017			2018			2017
Taxes calculated using the estimated annual effective tax rate	$	344		$	458		$	660		$	840
Discrete tax items		(43	)		(28	)		(172	)		(152	)
Provision for income taxes	$	301		$	430		$	488		$	688
Estimated annual effective tax rate		20	%		31	%		20	%		31	%
Actual effective tax rate		18	%		29	%		15	%		25	%