Note 20. Allowances for Sales Returns and Doubtful Accounts (Detail) - Activity for the Allowance for Sales Returns and Allowance and for Doubtful Accounts (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Mar. 31, 2013	Apr. 01, 2012	Mar. 27, 2011
Allowance for Sales Returns [Member]
Allowance for sales returns:
Balance at Beginning of Year	$ 1,429	$ 1,245	$ 1,250
Additions	15,176	15,701	14,790
Write-offs and Recoveries	15,521	15,517	14,795
Balance at End of Year	1,084	1,429	1,245
Allowance for Doubtful Accounts [Member]
Allowance for sales returns:
Balance at Beginning of Year	167	278	186
Additions	39	69	145
Write-offs and Recoveries		180	53
Balance at End of Year	$ 206	$ 167	$ 278