Segment Information - Segment Revenues, Operating Profits (Losses) and Assets (Detail) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Mar. 29, 2013	Mar. 30, 2012	Apr. 01, 2011
Revenues
Product revenues	$ 664,417	$ 542,064	$ 523,938
Service revenues	455,273	321,563	278,268
Total revenues	1,119,690	863,627	802,206
Operating (losses) profits
Amortization of acquired intangible assets	(15,584)	(18,732)	(19,409)
(Loss) income from operations	(20,362)	2,194	39,253
Assets
Total assets	1,794,072	1,727,153
Satellite Services [Member]
Revenues
Product revenues	4,715	2,998	5,551
Service revenues	272,272	219,674	229,401
Total revenues	276,987	222,672	234,952
Operating (losses) profits
Amortization of acquired intangible assets	(12,401)	(12,951)	(12,951)
(Loss) income from operations	(79,172)	(16,790)	38,228
Assets
Total assets	89,945	95,671
Commercial Networks [Member]
Revenues
Product revenues	295,469	229,941	167,446
Service revenues	19,471	21,736	15,697
Total revenues	314,940	251,677	183,143
Operating (losses) profits
Amortization of acquired intangible assets	(666)	(3,224)	(4,001)
(Loss) income from operations	(11,079)	(12,974)	(9,482)
Assets
Total assets	175,230	170,553
Government Systems [Member]
Revenues
Product revenues	364,233	309,125	350,941
Service revenues	163,530	80,153	33,170
Total revenues	527,763	389,278	384,111
Operating (losses) profits
Amortization of acquired intangible assets	(2,517)	(2,557)	(2,457)
(Loss) income from operations	85,473	50,690	29,872
Assets
Total assets	238,057	219,199
Intersegment Elimination [Member]
Revenues
Total revenues
Operating (losses) profits
(Loss) income from operations
Operating Segments [Member]
Operating (losses) profits
(Loss) income from operations	(4,778)	20,926	58,618
Assets
Total assets	503,232	485,423
Unallocated Amount to Segment [Member]
Operating (losses) profits
(Loss) income from operations			44
Assets
Total assets	$ 1,290,840	$ 1,241,730