Segment Information - Segment Revenues, Operating Profits (Losses) and Assets (Detail) (USD $) In Thousands, unless otherwise specified	3 Months Ended		9 Months Ended
	Jan. 03, 2014	Dec. 28, 2012	Jan. 03, 2014	Dec. 28, 2012	Mar. 29, 2013
Revenues:
Product revenues	$ 193,846	$ 164,694	$ 586,398	$ 480,898
Service revenues	138,709	121,748	421,140	330,129
Total revenues	332,555	286,442	1,007,538	811,027
Operating profits (losses):
Amortization of acquired intangible assets	(3,652)	(3,960)	(10,949)	(12,065)
Income (loss) from operations	1,524	1,266	4,438	(13,382)
Assets
Total assets	1,929,408		1,929,408		1,794,072
Satellite Services [Member]
Operating profits (losses):
Amortization of acquired intangible assets	(2,765)	(3,159)	(8,295)	(9,635)
Commercial Networks [Member]
Operating profits (losses):
Amortization of acquired intangible assets	(343)	(163)	(994)	(523)
Government Systems [Member]
Operating profits (losses):
Amortization of acquired intangible assets	(544)	(638)	(1,660)	(1,907)
Operating Segments [Member]
Operating profits (losses):
Income (loss) from operations	5,176	5,226	15,387	(1,317)
Assets
Total assets	530,584		530,584		503,232
Operating Segments [Member] | Satellite Services [Member]
Revenues:
Product revenues	11	653	31	4,159
Service revenues	98,637	71,097	284,815	194,217
Total revenues	98,648	71,750	284,846	198,376
Operating profits (losses):
Income (loss) from operations	(9,761)	(18,356)	(37,377)	(60,245)
Assets
Total assets	87,694		87,694		89,945
Operating Segments [Member] | Commercial Networks [Member]
Revenues:
Product revenues	87,845	64,241	284,815	216,116
Service revenues	4,014	4,411	14,630	15,208
Total revenues	91,859	68,652	299,445	231,324
Operating profits (losses):
Income (loss) from operations	(6,528)	(3,399)	(3,558)	(7,304)
Assets
Total assets	246,498		246,498		175,230
Operating Segments [Member] | Government Systems [Member]
Revenues:
Product revenues	105,990	99,800	301,552	260,623
Service revenues	36,058	46,240	121,695	120,704
Total revenues	142,048	146,040	423,247	381,327
Operating profits (losses):
Income (loss) from operations	21,465	26,981	56,322	66,232
Assets
Total assets	196,392		196,392		238,057
Intersegment Elimination [Member]
Revenues:
Total revenues
Operating profits (losses):
Income (loss) from operations
Corporate, Non-Segment [Member]
Operating profits (losses):
Income (loss) from operations
Assets
Total assets	1,398,824		1,398,824		1,290,840
Material Reconciling Items [Member]
Operating profits (losses):
Amortization of acquired intangible assets	$ (3,652)	$ (3,960)	$ (10,949)	$ (12,065)