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CONSOLIDATED STATEMENT OF COMPREHENSIVE INCOME (USD $) In Thousands, unless otherwise specified	3 Months Ended		6 Months Ended
	Oct. 26, 2013	Oct. 27, 2012	Oct. 26, 2013	Oct. 27, 2012
Statement of Comprehensive Income [Abstract]
Net income	$ 11,790	$ 11,547	$ 17,509	$ 18,225
Other comprehensive income (loss):
Cumulative translation adjustments	290	219	323	(8)
Unrealized gain (loss) on available-for-sale securities, net of tax	11	(12)	(20)	(38)
Total other comprehensive income (loss), net of tax	301	207	303	(46)
Comprehensive income	$ 12,091	$ 11,754	$ 17,812	$ 18,179

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Amount after tax of increase (decrease) in equity from transactions and other events and circumstances from net income and other comprehensive income, attributable to parent entity. Excludes changes in equity resulting from investments by owners and distributions to owners.

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The portion of profit or loss for the period, net of income taxes, which is attributable to the parent.

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