Segment Information - Other Acquired Intangible Assets, Net and Goodwill Included in Segment Assets and Amortization of Acquired Intangible Assets by Segment (Detail) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Sep. 30, 2015	Oct. 03, 2014	Sep. 30, 2015	Oct. 03, 2014	Apr. 03, 2015
Segment Reporting Information [Line Items]
Other acquired intangible assets, net	$ 40,690		$ 40,690		$ 42,340
Goodwill	117,375		117,375		117,241
Amortization of acquired intangible assets	4,587	$ 4,658	9,397	$ 8,687
Satellite Services [Member]
Segment Reporting Information [Line Items]
Amortization of acquired intangible assets	2,765	2,765	5,530	5,530
Commercial Networks [Member]
Segment Reporting Information [Line Items]
Amortization of acquired intangible assets	755	373	1,251	715
Government Systems [Member]
Segment Reporting Information [Line Items]
Amortization of acquired intangible assets	1,067	$ 1,520	2,616	$ 2,442
Operating Segments [Member] | Satellite Services [Member]
Segment Reporting Information [Line Items]
Other acquired intangible assets, net	12,343		12,343		17,873
Goodwill	9,809		9,809		9,809
Operating Segments [Member] | Commercial Networks [Member]
Segment Reporting Information [Line Items]
Other acquired intangible assets, net	7,899		7,899		1,443
Goodwill	43,972		43,972		43,994
Operating Segments [Member] | Government Systems [Member]
Segment Reporting Information [Line Items]
Other acquired intangible assets, net	20,448		20,448		23,024
Goodwill	$ 63,594		$ 63,594		$ 63,438