Segment Information (Details) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Mar. 30, 2012	Apr. 01, 2011	Apr. 02, 2010
Revenues
Product revenues	$ 542,064	$ 523,938	$ 584,074
Service revenues	321,563	278,268	104,006
Total revenues	863,627	802,206	688,080
Operating (losses) profits
Amortization of acquired intangible assets	(18,732)	(19,409)	(9,494)
Income (loss) from operations	2,194	39,253	43,010
Assets
Total assets	1,727,153	1,405,748
Satellite Services [Member]
Revenues
Product revenues	2,998	5,551	1,012
Service revenues	219,674	229,401	74,797
Total revenues	222,672	234,952	75,809
Operating (losses) profits
Amortization of acquired intangible assets	(12,951)	(12,951)	(3,779)
Income (loss) from operations	(16,790)	38,228	(9,305)
Assets
Total assets	95,671	93,857
Commercial Networks [Member]
Revenues
Product revenues	229,941	167,446	213,142
Service revenues	21,736	15,697	13,978
Total revenues	251,677	183,143	227,120
Operating (losses) profits
Amortization of acquired intangible assets	(3,224)	(4,001)	(4,629)
Income (loss) from operations	(12,974)	(9,482)	6,091
Assets
Total assets	170,553	133,158
Government Systems [Member]
Revenues
Product revenues	309,125	350,941	369,920
Service revenues	80,153	33,170	15,231
Total revenues	389,278	384,111	385,151
Operating (losses) profits
Amortization of acquired intangible assets	(2,557)	(2,457)	(1,086)
Income (loss) from operations	50,690	29,872	55,720
Assets
Total assets	219,199	228,194
Unallocated Amount to Segment [Member]
Operating (losses) profits
Income (loss) from operations		44	(2)
Assets
Total assets	1,241,730	950,539
Operating Segments [Member]
Operating (losses) profits
Income (loss) from operations	20,926	58,618	52,506
Assets
Total assets	485,423	455,209
Intersegment Elimination [Member]
Revenues
Total revenues
Operating (losses) profits
Income (loss) from operations