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SCHEDULE II - VALUATION AND QUALIFYING ACCOUNTS - (Details) (USD $)
In Thousands, unless otherwise specified
12 Months Ended
Apr. 27, 2013
Apr. 28, 2012
Apr. 30, 2011
Allowance for Doubtful Accounts
     
Valuation and Qualifying Accounts Disclosure [Line Items]      
Balance at Beginning of Year $ 2,398 $ 2,548 $ 2,585
Charged to Costs and Expenses 782 110 101
Charged to Other Accounts 0 0 0
Deductions (462) [1] (260) [1] (138) [1]
Balance at End of Year 2,718 2,398 2,548
Allowance for Excess and Obsolete Inventories
     
Valuation and Qualifying Accounts Disclosure [Line Items]      
Balance at Beginning of Year 2,851 2,139 3,414
Charged to Costs and Expenses 3,094 2,537 2,131
Charged to Other Accounts 1 [2] 11 [2] 10 [2]
Deductions (2,660) [3] (1,836) [3] (3,416) [3]
Balance at End of Year $ 3,286 $ 2,851 $ 2,139
[1] Write-off of uncollected accounts, net of collections.
[2] Translation adjustment on foreign subsidiary balances.
[3] Obsolete and excess inventory disposals