Segment Information - Segment Revenues, Operating Profits (Losses) and Assets (Detail) (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Jun. 28, 2013	Jun. 29, 2012	Mar. 29, 2013
Revenues:
Product revenues	$ 182,161	$ 147,729
Service revenues	138,941	94,034
Total revenues	321,102	241,763
Operating profits (losses):
Amortization of acquired intangible assets	(3,501)	(4,064)
Income (loss) from operations	3,424	(13,789)
Assets
Total assets	1,837,271		1,794,072
Satellite Services [Member]
Revenues:
Product revenues	16	531
Service revenues	85,831	58,788
Total revenues	85,847	59,319
Operating profits (losses):
Amortization of acquired intangible assets	(2,765)	(3,238)
Income (loss) from operations	(12,978)	(22,516)
Assets
Total assets	86,859		89,945
Commercial Networks [Member]
Revenues:
Product revenues	91,824	70,762
Service revenues	5,575	5,373
Total revenues	97,399	76,135
Operating profits (losses):
Amortization of acquired intangible assets	(143)	(184)
Income (loss) from operations	3,336	(2,069)
Assets
Total assets	211,986		175,230
Government Systems [Member]
Revenues:
Product revenues	90,321	76,436
Service revenues	47,535	29,873
Total revenues	137,856	106,309
Operating profits (losses):
Amortization of acquired intangible assets	(593)	(642)
Income (loss) from operations	16,567	14,860
Assets
Total assets	215,323		238,057
Intersegment Elimination [Member]
Revenues:
Total revenues
Operating profits (losses):
Income (loss) from operations
Operating Segments [Member]
Operating profits (losses):
Income (loss) from operations	6,925	(9,725)
Assets
Total assets	514,168		503,232
Unallocated Amount to Segment [Member]
Operating profits (losses):
Income (loss) from operations
Assets
Total assets	$ 1,323,103		$ 1,290,840