Valuation and Qualifying Accounts (Details) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Mar. 31, 2012	Apr. 02, 2011	Apr. 03, 2010
Allowance for doubtful accounts [Member]
Valuation and Qualifying Accounts
Valuation Allowances and Reserves, Beginning of Year	$ 3,579	$ 3,628	$ 3,629
Valuation Allowances And Reserves, Additions	180
Valuation Allowances and Reserves, Deductions	313	49	1
Valuation Allowances and Reserves, End of Year	3,446	3,579	3,628
Allowance for deferred tax assets [Member]
Valuation and Qualifying Accounts
Valuation Allowances and Reserves, Beginning of Year	17,841
Valuation Allowances And Reserves, Additions	11,745	17,841
Valuation Allowances and Reserves, Deductions	623
Valuation Allowances and Reserves, End of Year	$ 28,963	$ 17,841