Income Taxes	9 Months Ended
Dec. 31, 2016
Income Tax Disclosure [Abstract]
Income Taxes	Income Taxes The Company recorded tax provisions of $20.7 million and $50.8 million for the third quarter and the first nine months of fiscal 2017, respectively, representing an effective tax rate of 13% and 10%, respectively. The Company recorded tax provisions of $24.2 million and $61.2 million for the third quarter and the first nine months of fiscal 2016, respectively, representing an effective tax rate of 16% and 13%, respectively. The difference between the U.S. federal statutory tax rate of 35% and the Company’s effective tax rate in all periods is primarily due to income earned in lower tax rate jurisdictions, for which no U.S. income tax has been provided, as the Company intends to permanently reinvest these earnings outside of the U.S. The Company’s total gross unrecognized tax benefits as of December 31, 2016, determined in accordance with FASB authoritative guidance for measuring uncertain tax positions, increased by $289 thousand in the third quarter of fiscal 2017 to $26.3 million. The total amount of unrecognized tax benefits that, if realized in a future period, would favorably affect the effective tax rate was $7.6 million as of December 31, 2016. The Company’s policy is to include interest and penalties related to income tax liabilities within the provision for income taxes on the condensed consolidated statements of income. The balance of accrued interest and penalties recorded in the condensed consolidated balance sheets and the amounts of interest and penalties included in the Company's provision for income taxes were not material for all periods presented. The Company is no longer subject to U.S. federal audits by taxing authorities for years through fiscal 2011, U.S. state audits for years through fiscal 2010 and tax audits in Ireland for years through fiscal 2012. The Company had been subject to examination by the IRS for fiscal years 2012 through 2014. During the fourth quarter of fiscal 2016, the IRS completed its fieldwork and issued a Revenue Agent Report. The case was then moved forward to the Joint Committee on Taxation for review. On July 29, 2016, the Company received written notification that the Joint Committee had completed its review and had taken no exception to the conclusions reached by the IRS. As a result of the early adoption of new guidance on accounting for share-based payments, the Company recorded excess tax benefits of $1.2 million and $10.9 million for the third quarter and first nine months of fiscal 2017, respectively, in the condensed consolidated statement of income as a component of the provision for income taxes. Please refer to "Note 2. Recent Accounting Changes and Accounting Pronouncements" for more details regarding the adoption of the new guidance.

Income Taxes

The Company recorded tax provisions of $20.7 million and $50.8 million for the third quarter and the first nine months of fiscal 2017, respectively, representing an effective tax rate of 13% and 10%, respectively. The Company recorded tax provisions of $24.2 million and $61.2 million for the third quarter and the first nine months of fiscal 2016, respectively, representing an effective tax rate of 16% and 13%, respectively.

The difference between the U.S. federal statutory tax rate of 35% and the Company’s effective tax rate in all periods is primarily due to income earned in lower tax rate jurisdictions, for which no U.S. income tax has been provided, as the Company intends to permanently reinvest these earnings outside of the U.S.

The Company’s total gross unrecognized tax benefits as of December 31, 2016, determined in accordance with FASB authoritative guidance for measuring uncertain tax positions, increased by $289 thousand in the third quarter of fiscal 2017 to $26.3 million. The total amount of unrecognized tax benefits that, if realized in a future period, would favorably affect the effective tax rate was $7.6 million as of December 31, 2016.

The Company’s policy is to include interest and penalties related to income tax liabilities within the provision for income taxes on the condensed consolidated statements of income. The balance of accrued interest and penalties recorded in the condensed consolidated balance sheets and the amounts of interest and penalties included in the Company's provision for income taxes were not material for all periods presented.

The Company is no longer subject to U.S. federal audits by taxing authorities for years through fiscal 2011, U.S. state audits for years through fiscal 2010 and tax audits in Ireland for years through fiscal 2012.

The Company had been subject to examination by the IRS for fiscal years 2012 through 2014. During the fourth quarter of fiscal 2016, the IRS completed its fieldwork and issued a Revenue Agent Report. The case was then moved forward to the Joint Committee on Taxation for review. On July 29, 2016, the Company received written notification that the Joint Committee had completed its review and had taken no exception to the conclusions reached by the IRS.

As a result of the early adoption of new guidance on accounting for share-based payments, the Company recorded excess tax benefits of $1.2 million and $10.9 million for the third quarter and first nine months of fiscal 2017, respectively, in the condensed consolidated statement of income as a component of the provision for income taxes. Please refer to "Note 2. Recent Accounting Changes and Accounting Pronouncements" for more details regarding the adoption of the new guidance.