Income Taxes

6 Months Ended

Sep. 30, 2011

Income Taxes [Abstract]

Income Taxes

16. Income Taxes

The estimated annual effective tax rate as of September 30, 2011 for fiscal year 2012 is 34.2%, compared to an estimated annual effective rate of 35.6% as of September 30, 2010 for fiscal year 2011. Generally, the estimated annual effective tax rates differ from statutory rates primarily due to the impact of the domestic production activities deduction, differences in tax rates in foreign jurisdictions and federal and state tax credits.