Operating Segment Information (Details 1) (USD $) In Thousands, unless otherwise specified	3 Months Ended		9 Months Ended
	Dec. 28, 2013	Dec. 29, 2012	Dec. 28, 2013	Dec. 29, 2012
Reconciliation of "All other" category:
Share-based compensation expense			$ (24,750)	$ (24,124)
Income (loss) from operations	15,392	5,680	28,083	(17,337)
All other [Member]
Reconciliation of "All other" category:
Share-based compensation expense	(4,882)	(8,832)	(24,750)	(24,124)
Amortization of intangible assets	(7,219)	(6,456)	(21,182)	(15,780)
Acquisition-related costs and restructuring expenses	0	(4,577)	(130)	(4,577)
Restructuring and disposal costs associated with the phase out of manufacturing and sale of the U.K. facility	(149)	0	(7,958)	0
Loss on asset transfer transaction	0	0	0	(5,042)
IPR litigation costs	(2,333)	(1,173)	(5,059)	(4,691)
Inventory revaluation resulting from transfer of MBE operations	0	0	0	(2,518)
Certain consulting expense	(3,430)	0	(10,430)	0
Expenses related to a potential strategic transaction that was terminated	(2,883)	0	(2,883)	0
Other expenses (including restructuring, (gain) loss on property and equipment, and start-up costs)	(3,697)	(106)	(4,699)	(964)
Income (loss) from operations	$ (24,593)	$ (21,144)	$ (77,091)	$ (57,696)