Acquired Intangible Assets - Components of Expense (Details) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Mar. 30, 2013	Mar. 31, 2012	Apr. 02, 2011
Acquired Finite-Lived Intangible Assets [Line Items]
Amortization of acquired intangible assets	$ 4,784	$ 1,722	$ 1,964
Cost of Sales
Acquired Finite-Lived Intangible Assets [Line Items]
Amortization of acquired intangible assets	4,239	1,157	1,157
Selling, service and administration
Acquired Finite-Lived Intangible Assets [Line Items]
Amortization of acquired intangible assets	305	315	576
Research, development and engineering
Acquired Finite-Lived Intangible Assets [Line Items]
Amortization of acquired intangible assets	$ 240	$ 250	$ 231