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Income Taxes | 3 Months Ended
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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 | %

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- Definition The entire disclosure for income taxes. Disclosures may include net deferred tax liability or asset recognized in an enterprise's statement of financial position, net change during the year in the total valuation allowance, approximate tax effect of each type of temporary difference and carryforward that gives rise to a significant portion of deferred tax liabilities and deferred tax assets, utilization of a tax carryback, and tax uncertainties information. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -URI http://asc.fasb.org/topic&trid=2144680 + Details
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