Income Taxes	6 Months Ended
Jun. 30, 2021
Income Tax Disclosure [Abstract]
Income Taxes	Note 10: Income Taxes Management estimates the annual effective income tax rate quarterly, based on current annual forecasted results. Items unrelated to current year ordinary income are recognized entirely in the period identified as a discrete item of tax. The quarterly income tax provision includes tax on ordinary income provided at the most recent estimated annual effective tax rate (“ETR”), increased or decreased for the tax effect of discrete items. For the six months ended June 30, 2021 and 2020, our estimated annual effective tax rates applied to ordinary income were 27.5% and 24.7%, respectively. The difference between the federal statutory rate of 21.0% and the projected annual ETR of 27.5% for 2021 is primarily due to research and development credits. Discrete items during the six months ended June 30, 2021 and 2020 were not significant and were primarily related to expense recorded upon the expiration of stock options, and our ETR for the first half of each year was 26.3% and 23.6%, respectively.

- 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.

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