Basis of Presentation (Details 1) (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Jun. 29, 2012	Jul. 01, 2011
Derivative Instruments, Gain (Loss) [Line Items]
Amount of gain or (loss) recognized in Accumulated OCI on derivatives (effective portion)	$ (277)	$ 54
Amount of gain or (loss) reclassified from accumulated OCI into income (effective portion)	(132)	160
Foreign currency forward contracts [Member] | Cash Flow Hedging [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Amount of gain or (loss) recognized in Accumulated OCI on derivatives (effective portion)	(277)	54
Foreign currency forward contracts [Member] | Cash Flow Hedging [Member] | Cost of product revenues [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Amount of gain or (loss) reclassified from accumulated OCI into income (effective portion)	$ (132)	$ 160