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Subsequent Event	6 Months Ended
	Oct. 31, 2012
Subsequent Event [Abstract]
Subsequent Event	(17) Subsequent Event: During our third fiscal quarter, our board of directors authorized our management to repurchase up to $20.0 million of our common stock, subject to certain conditions, in the open market or privately negotiated transactions on or prior to June 30, 2013.

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The entire disclosure for significant events or transactions that occurred after the balance sheet date through the date the financial statements were issued or the date the financial statements were available to be issued. Examples include: the sale of a capital stock issue, purchase of a business, settlement of litigation, catastrophic loss, significant foreign exchange rate changes, loans to insiders or affiliates, and transactions not in the ordinary course of business.

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