Income Taxes	3 Months Ended
Mar. 31, 2020
Income Taxes
Income Taxes	8. Income Taxes The U.S. federal statutory tax rate was 21% for each of the three months ended March 31, 2020 and 2019. The Company’s effective tax rate for the three months ended March 31, 2020 was 29.1% of pretax income compared to the effective tax rate for the three months ended March 31, 2019 of 27.8%. The difference between the U.S. federal statutory tax rate and the Company’s effective tax rate for the three months ended March 31, 2020 was primarily due to state income taxes and excess tax expense pertaining to the vesting of stock awards related to the Company’s stock compensation program along with foreign earnings and the associated impact of the global intangible low tax income (“GILTI”). The difference between the U.S. federal statutory tax rate and the Company’s effective tax rate for the three months ended March 31, 2019, was primarily due to state income taxes offset by the impact of the Company’s noncontrolling interest. The Company had unrecognized tax benefits of approximately $0.2 million as of March 31, 2020 and December 31, 2019 , which were included in other liabilities in the accompanying consolidated balance sheets. The Company’s policy is to recognize interest and penalties related to income tax liabilities as a component of income tax expense in the consolidated statements of operations. The amount of interest and penalties charged to income tax expense related to unrecognized tax benefits was not significant for the three months ended March 31, 2020. The Company is subject to taxation in various jurisdictions. The Company’s 2017 and 2018 tax returns are subject to examination by U.S. federal authorities. The Company’s tax returns are subject to examination by various state authorities for the years 2015 through 2018.

8. Income Taxes

The U.S. federal statutory tax rate was 21% for each of the three months ended March 31, 2020 and 2019. The Company’s effective tax rate for the three months ended March 31, 2020 was 29.1% of pretax income compared to the effective tax rate for the three months ended March 31, 2019 of 27.8%.

The difference between the U.S. federal statutory tax rate and the Company’s effective tax rate for the three months ended March 31, 2020 was primarily due to state income taxes and excess tax expense pertaining to the vesting of stock awards related to the Company’s stock compensation program along with foreign earnings and the associated impact of the global intangible low tax income (“GILTI”).

The difference between the U.S. federal statutory tax rate and the Company’s effective tax rate for the three months ended March 31, 2019, was primarily due to state income taxes offset by the impact of the Company’s noncontrolling interest.

The Company had unrecognized tax benefits of approximately $0.2 million as of March 31, 2020 and December 31, 2019 , which were included in other liabilities in the accompanying consolidated balance sheets.

The Company’s policy is to recognize interest and penalties related to income tax liabilities as a component of income tax expense in the consolidated statements of operations. The amount of interest and penalties charged to income tax expense related to unrecognized tax benefits was not significant for the three months ended March 31, 2020.

The Company is subject to taxation in various jurisdictions. The Company’s 2017 and 2018 tax returns are subject to examination by U.S. federal authorities. The Company’s tax returns are subject to examination by various state authorities for the years 2015 through 2018.