Income Taxes

6 Months Ended

Oct. 31, 2011

Income Taxes [Abstract]

Income Taxes

Note O – Income Taxes

During the three months ended October 31, 2011, the Company’s effective tax rate increased to 34.1 percent, compared to 32.5 percent in the three months ended October 31, 2010. The increase in the effective tax rate in the three months ended October 31, 2011, is primarily due to a higher Canadian effective tax rate and an increase in state income tax expense compared to the three months ended October 31, 2010.

During the six months ended October 31, 2011, the Company’s effective tax rate increased to 33.7 percent compared to 32.0 percent for the six months ended October 31, 2010. The increase in the effective tax rate in the six months ended October 31, 2011, is primarily due to an increase in the Canadian effective tax rate and higher state income tax expense compared to the six months ended October 31, 2010. Also contributing to the higher effective tax rate in the six months ended October 31, 2011, was a favorable federal income tax determination that was included in the six months ended October 31, 2010.

At October 31, 2011, the effective income tax rate varied from the U.S. statutory income tax rate primarily due to the domestic manufacturing deduction partially offset by state income taxes.

Within the next twelve months, it is reasonably possible that the Company could decrease its unrecognized tax benefits by an additional $1.1 million, primarily as a result of expiring statute of limitations periods.