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Income Taxes - Unrecognized Tax Benefits (Details) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Apr. 27, 2013	Apr. 28, 2012	Apr. 30, 2011
Reconciliation of Changes in Unrecognized Tax Benefits
Unrecognized tax benefits, beginning balance	$ 449	$ 527	$ 538
Gross increases related to prior period tax positions	0	14	132
Gross decreases related to prior period tax positions	(11)	(178)	(104)
Gross increases related to current period tax positions	129	86	81
Lapse of statute of limitations	(188)	0	(120)
Unrecognized tax benefits, ending balance	$ 379	$ 449	$ 527

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- Definition

The gross amount of unrecognized tax benefits pertaining to uncertain tax positions taken in tax returns as of the balance sheet date.

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The gross amount of decreases in unrecognized tax benefits resulting from tax positions taken in prior period tax returns, excluding amounts pertaining to examined tax returns.

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The gross amount of increases in unrecognized tax benefits resulting from tax positions that have been or will be taken in the tax return for the current period, excluding amounts pertaining to examined tax returns.

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