Segment Information - Segment Revenues, Operating (Losses) Profits and Assets (Parenthetical) (Detail) (USD $) In Thousands, unless otherwise specified	3 Months Ended		6 Months Ended
	Oct. 03, 2014	Oct. 04, 2013	Oct. 03, 2014	Oct. 04, 2013
Segment Reporting Information [Line Items]
Product revenue	$ 193,924	$ 210,391	$ 362,053	$ 392,552
Income (loss) from operations	46,456	(510)	45,287	2,914
Implied license [Member] | Satellite Services [Member]
Segment Reporting Information [Line Items]
Product revenue	21,000
Operating Segments [Member]
Segment Reporting Information [Line Items]
Income (loss) from operations	51,114	3,286	53,974	10,211
Operating Segments [Member] | Satellite Services [Member]
Segment Reporting Information [Line Items]
Product revenue	21,289	4	21,319	20
Income (loss) from operations	39,351	(14,638)	37,402	(27,616)
Operating Segments [Member] | Implied license [Member] | Satellite Services [Member]
Segment Reporting Information [Line Items]
Product revenue	21,000		21,000
Operating Segments [Member] | Implied license and other damages [Member] | Satellite Services [Member]
Segment Reporting Information [Line Items]
Income (loss) from operations	$ 39,700		$ 39,700