Income Taxes	3 Months Ended
Mar. 31, 2019
Income Tax Disclosure [Abstract]
Income Taxes	Income Taxes Our effective tax rates of 22.2% and 27.3% for the three months ended March 31, 2019 and 2018, respectively, differ from the U.S. statutory rate of 21.0% due to the impacts of state income taxes, income attributable to the noncontrolling interests in partially-owned leasing subsidiaries for which no income tax expense is provided, the incremental tax on profits of branches taxed in both U.S. and foreign jurisdictions, and tax return true-ups in foreign jurisdictions. Additionally, during the three months ended March 31, 2018, we adjusted our initial assessment of the tax effects of the 2017 Tax Cuts and Jobs Act and recorded a $0.5 million income tax benefit. Our federal tax years remain open under statute from 2014 forward. The 2014-2017 tax years have been reviewed by the Internal Revenue Service but remain open due to tax loss carryback claims that have been filed. We have state tax returns that are under audit in the normal course of business, and our Mexican subsidiaries remain open from 2013 forward. We believe we are appropriately reserved for any potential issues. During the three months ended March 31, 2019, we effectively settled a state tax audit resulting in a decrease in uncertain tax positions of $5.7 million. During the three months ended March 31, 2018, we increased our uncertain tax positions by $1.5 million due to state tax issues.

Income Taxes

Our effective tax rates of 22.2% and 27.3% for the three months ended March 31, 2019 and 2018, respectively, differ from the U.S. statutory rate of 21.0% due to the impacts of state income taxes, income attributable to the noncontrolling interests in partially-owned leasing subsidiaries for which no income tax expense is provided, the incremental tax on profits of branches taxed in both U.S. and foreign jurisdictions, and tax return true-ups in foreign jurisdictions. Additionally, during the three months ended March 31, 2018, we adjusted our initial assessment of the tax effects of the 2017 Tax Cuts and Jobs Act and recorded a $0.5 million income tax benefit.

Our federal tax years remain open under statute from 2014 forward. The 2014-2017 tax years have been reviewed by the Internal Revenue Service but remain open due to tax loss carryback claims that have been filed. We have state tax returns that are under audit in the normal course of business, and our Mexican subsidiaries remain open from 2013 forward. We believe we are appropriately reserved for any potential issues.

During the three months ended March 31, 2019, we effectively settled a state tax audit resulting in a decrease in uncertain tax positions of $5.7 million. During the three months ended March 31, 2018, we increased our uncertain tax positions by $1.5 million due to state tax issues.