Accrued Expenses and Other Current Liabilities (Details) (USD $) In Thousands, unless otherwise specified	Apr. 27, 2013	Apr. 28, 2012
Accrued Expenses and Other Current Liabilities [Abstract]
Payroll and other compensation	$ 39,270	$ 36,638
Accrued product warranty, current portion	9,532	8,230
Customer deposits	15,852	12,204
Other current liabilities	34,454	34,228
Accrued expenses and other current liabilities	$ 99,108	$ 91,300

Carrying value as of the balance sheet date of obligations incurred through that date and payable arising from transactions not otherwise specified in the taxonomy. Used to reflect the current portion of the liabilities (due within one year or within the normal operating cycle if longer).

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Aggregate carrying amount of current liabilities (due within one year or within the normal operating cycle if longer) not separately disclosed in the balance sheet. Includes costs that are statutory in nature, are incurred on contractual obligations, or accumulate over time and for which invoices have not yet been received or will not be rendered and of liabilities not separately disclosed.

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- Definition

Carrying value as of the balance sheet date of obligations incurred through that date and payable for estimated claims under standard and extended warranty protection rights granted to customers. For classified balance sheets, represents the current portion of the liabilities (due within one year or within the normal operating cycle if longer).

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