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Warranty (Tables)
 12 Months Ended
May 03, 2015
Product Warranties Disclosures [Abstract]  
Schedule of Product Warranty Liability
Changes in the Company’s warranty liability during the following periods were as follows:
 
As of
(in thousands)
May 3, 2015
 
April 27, 2014
Beginning balance
$
5,744

 
$
4,155

Additions during the period based on product sold
6,171

 
5,653

Additions during the period due to acquisitions
—

 
515

Change in estimates
(1,388
)
 
(2,022
)
Settlements and expirations
(4,076
)
 
(2,557
)
Ending balance
$
6,451

 
$
5,744