Income Taxes	9 Months Ended
Dec. 31, 2017
Income Tax Disclosure [Abstract]
Income Taxes	Income Taxes On December 22, 2017, the U.S. government enacted comprehensive tax legislation commonly referred to as the Tax Cuts and Jobs Act ("Tax Act"). The Tax Act represents significant U.S. federal tax reform legislation that includes a permanent reduction to the U.S. federal corporate income tax rate. The permanent reduction to the federal corporate income tax rate resulted in a one-time gain related to the value of our deferred tax liabilities resulting in a net gain of $281.2 million. Additionally, the tax reform legislation subjects certain of our cumulative foreign earnings and profits to U.S. income taxes through a deemed repatriation which resulted in a charge of $3.0 million during the three months ended December 31, 2017. The changes included in the Tax Act are broad and complex. The final transition impacts of the Tax Act may differ from the above estimate, possibly materially, due to, among other things, changes in interpretations of the Tax Act, any legislative action to address questions that arise because of the Tax Act, any changes in accounting standards for income taxes or related interpretations in response to the Tax Act, or any updates or changes to estimates the Company has utilized to calculate the transition impacts, including impacts from changes to current year earnings estimates and foreign exchange rates of foreign subsidiaries. The U.S. Securities and Exchange Commission has issued rules that would allow for a measurement period of up to one year after the enactment date of the Tax Act to finalize the recording of the related tax impacts. Income taxes are recorded in our quarterly financial statements based on our estimated annual effective income tax rate, subject to adjustments for discrete events, should they occur. The effective rates used in the calculation of income taxes were (446.1)% and 37.6% for the three months ended December 31, 2017 and 2016, respectively. The effective rates used in the calculation of income taxes were (137.6)% and 36.7% for the nine months ended December 31, 2017 and 2016, respectively. The decrease in the effective tax rate for the three and nine months ended December 31, 2017 was primarily due to the effects of the Tax Act discussed above. The balance in our uncertain tax liability was $7.7 million at December 31, 2017 and $3.7 million March 31, 2017. The increase in our uncertain tax liability was primarily related to a measurement period adjustment associated with our Fleet acquisition. We recognize interest and penalties related to uncertain tax positions as a component of income tax expense. We did not incur any material interest or penalties related to income taxes in any of the periods presented.

Income Taxes

On December 22, 2017, the U.S. government enacted comprehensive tax legislation commonly referred to as the Tax Cuts and Jobs Act ("Tax Act"). The Tax Act represents significant U.S. federal tax reform legislation that includes a permanent reduction to the U.S. federal corporate income tax rate. The permanent reduction to the federal corporate income tax rate resulted in a one-time gain related to the value of our deferred tax liabilities resulting in a net gain of $281.2 million. Additionally, the tax reform legislation subjects certain of our cumulative foreign earnings and profits to U.S. income taxes through a deemed repatriation which resulted in a charge of $3.0 million during the three months ended December 31, 2017.

The changes included in the Tax Act are broad and complex. The final transition impacts of the Tax Act may differ from the above estimate, possibly materially, due to, among other things, changes in interpretations of the Tax Act, any legislative action to address questions that arise because of the Tax Act, any changes in accounting standards for income taxes or related interpretations in response to the Tax Act, or any updates or changes to estimates the Company has utilized to calculate the transition impacts, including impacts from changes to current year earnings estimates and foreign exchange rates of foreign subsidiaries. The U.S. Securities and Exchange Commission has issued rules that would allow for a measurement period of up to one year after the enactment date of the Tax Act to finalize the recording of the related tax impacts.

Income taxes are recorded in our quarterly financial statements based on our estimated annual effective income tax rate, subject to adjustments for discrete events, should they occur. The effective rates used in the calculation of income taxes were (446.1)% and 37.6% for the three months ended December 31, 2017 and 2016, respectively. The effective rates used in the calculation of income taxes were (137.6)% and 36.7% for the nine months ended December 31, 2017 and 2016, respectively. The decrease in the effective tax rate for the three and nine months ended December 31, 2017 was primarily due to the effects of the Tax Act discussed above.

The balance in our uncertain tax liability was $7.7 million at December 31, 2017 and $3.7 million March 31, 2017. The increase in our uncertain tax liability was primarily related to a measurement period adjustment associated with our Fleet acquisition. We recognize interest and penalties related to uncertain tax positions as a component of income tax expense. We did not incur any material interest or penalties related to income taxes in any of the periods presented.