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Income Taxes
9 Months Ended
Dec. 31, 2011
Income Taxes [Abstract]  
Income Taxes
17. Income Taxes

The estimated annual effective tax rate as of December 31, 2011 for fiscal year 2012 is 34.9%, compared to an estimated annual effective rate of 33.6% as of December 31, 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.