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Income Taxes	9 Months Ended
Income Taxes	Jan. 31, 2013
Income Tax Disclosure [Abstract]
Income Taxes	Note 15: Income Taxes During the three months ended January 31, 2013 and 2012, the Company’s effective tax rate was 34.1 percent. During the nine months ended January 31, 2013 and 2012, the Company’s effective tax rate was 33.8 percent. 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 $3.1 million, primarily as a result of expiring statute of limitations periods.

The entire disclosure for income taxes. Disclosures may include net deferred tax liability or asset recognized in an enterprise's statement of financial position, net change during the year in the total valuation allowance, approximate tax effect of each type of temporary difference and carryforward that gives rise to a significant portion of deferred tax liabilities and deferred tax assets, utilization of a tax carryback, and tax uncertainties information.

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+ Details