Income Taxes	3 Months Ended
Jun. 30, 2012
Income Tax Disclosure [Abstract]
Income Taxes	Income Taxes The Company recorded a tax provision of $25.1 million for the first quarter of fiscal 2013 as compared to $26.1 million in the same prior year period, representing effective tax rates of 16% and 14%, respectively. The difference between the U.S. federal statutory tax rate of 35% and the Company’s effective tax rate 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 June 30, 2012, determined in accordance with FASB authoritative guidance for measuring uncertain tax positions, increased by $677 thousand in the first quarter of fiscal 2013 to $65.7 million. The total amount of unrecognized tax benefits that, if realized in a future period, would favorably affect the effective tax rate was $41.8 million as of June 30, 2012. It is reasonably possible that changes to our unrecognized tax benefits could be significant in the next twelve months due to tax audit settlements and lapses of statutes of limitation. As a result of uncertainties regarding tax audit settlements and their possible outcomes, an estimate of the range of increase or decrease that could occur in the next twelve months cannot be made. The Company’s policy is to include interest and penalties related to income tax liabilities within the provision for income taxes on the consolidated statements of income. The balance of accrued interest and penalties recorded in the condensed consolidated balance sheet as of June 30, 2012 was $938 thousand. The increase of interest and penalties included in the Company’s provision for income taxes totaled $99 thousand in the first quarter of fiscal 2013. The Company is no longer subject to U.S. federal audits by taxing authorities for years through fiscal 2008. The Company is no longer subject to U.S. state audits for years through fiscal 2004, except for fiscal years 1996 through 2001 which are still open for audit purposes. The Company is no longer subject to tax audits in Ireland for years through fiscal 2007.

Income Taxes

3 Months Ended

Jun. 30, 2012

The Company recorded a tax provision of $25.1 million for the first quarter of fiscal 2013 as compared to $26.1 million in the same prior year period, representing effective tax rates of 16% and 14%, respectively.

The difference between the U.S. federal statutory tax rate of 35% and the Company’s effective tax rate 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 June 30, 2012, determined in accordance with FASB authoritative guidance for measuring uncertain tax positions, increased by $677 thousand in the first quarter of fiscal 2013 to $65.7 million. The total amount of unrecognized tax benefits that, if realized in a future period, would favorably affect the effective tax rate was $41.8 million as of June 30, 2012. It is reasonably possible that changes to our unrecognized tax benefits could be significant in the next twelve months due to tax audit settlements and lapses of statutes of limitation. As a result of uncertainties regarding tax audit settlements and their possible outcomes, an estimate of the range of increase or decrease that could occur in the next twelve months cannot be made.

The Company’s policy is to include interest and penalties related to income tax liabilities within the provision for income taxes on the consolidated statements of income. The balance of accrued interest and penalties recorded in the condensed consolidated balance sheet as of June 30, 2012 was $938 thousand. The increase of interest and penalties included in the Company’s provision for income taxes totaled $99 thousand in the first quarter of fiscal 2013.

The Company is no longer subject to U.S. federal audits by taxing authorities for years through fiscal 2008. The Company is no longer subject to U.S. state audits for years through fiscal 2004, except for fiscal years 1996 through 2001 which are still open for audit purposes. The Company is no longer subject to tax audits in Ireland for years through fiscal 2007.