Income Taxes

6 Months Ended

Jun. 30, 2019

Income Taxes [Abstract]

Income Taxes

Note 11.  Income Taxes

The Company's combined effective income tax rates were 23.1% and 17.3% for the three-month periods ended June 30, 2019 and 2018, respectively. The Company's combined effective income tax rates were 22.3% and 10.8% for the six-month periods ended June 30, 2019 and 2018, respectively. The Company's effective tax rate for each period includes the effect of state income taxes and other discrete items as well as a benefit for research and development credits.

The Company's recorded liability for uncertain tax positions as of June 30, 2019 has increased by approximately $101 as compared to December 31, 2018 due to exposure related to federal and state credits, plus additional taxes and interest on existing reserves.