Segment Information - Segment Revenues and Operating Profits (Losses) (Detail) - USD ($) $ in Thousands	3 Months Ended
	Jun. 30, 2015	Jul. 04, 2014
Revenues:
Product revenues	$ 168,348	$ 168,129
Service revenues	176,030	151,342
Total revenues	344,378	319,471
Operating profits (losses):
Income (loss) from operations	9,414	(1,169)
Amortization of acquired intangible assets	(4,810)	(4,029)
Satellite Services [Member]
Operating profits (losses):
Amortization of acquired intangible assets	(2,765)	(2,765)
Commercial Networks [Member]
Operating profits (losses):
Amortization of acquired intangible assets	(496)	(343)
Government Systems [Member]
Operating profits (losses):
Amortization of acquired intangible assets	(1,549)	(921)
Operating Segments [Member]
Operating profits (losses):
Income (loss) from operations	14,224	2,860
Operating Segments [Member] | Satellite Services [Member]
Revenues:
Product revenues	6,276	30
Service revenues	126,140	109,685
Total revenues	132,416	109,715
Operating profits (losses):
Income (loss) from operations	17,041	(1,949)
Operating Segments [Member] | Commercial Networks [Member]
Revenues:
Product revenues	61,511	88,592
Service revenues	5,244	3,636
Total revenues	66,755	92,228
Operating profits (losses):
Income (loss) from operations	(18,733)	(5,990)
Operating Segments [Member] | Government Systems [Member]
Revenues:
Product revenues	100,561	79,507
Service revenues	44,646	38,021
Total revenues	145,207	117,528
Operating profits (losses):
Income (loss) from operations	15,916	10,799
Material Reconciling Items [Member]
Operating profits (losses):
Amortization of acquired intangible assets	$ (4,810)	$ (4,029)