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		9 Months Ended
	Dec. 31, 2015	Jan. 02, 2015	Dec. 31, 2015	Jan. 02, 2015	Apr. 03, 2015
Segment Reporting Information [Line Items]
Other acquired intangible assets, net	$ 36,410		$ 36,410		$ 42,340
Goodwill	117,186		117,186		117,241
Amortization of acquired intangible assets	4,261	$ 4,651	13,658	$ 13,338
Satellite Services [Member]
Segment Reporting Information [Line Items]
Amortization of acquired intangible assets	2,488	2,765	8,018	8,295
Commercial Networks [Member]
Segment Reporting Information [Line Items]
Amortization of acquired intangible assets	706	369	1,957	1,084
Government Systems [Member]
Segment Reporting Information [Line Items]
Amortization of acquired intangible assets	1,067	$ 1,517	3,683	$ 3,959
Operating Segments [Member] | Satellite Services [Member]
Segment Reporting Information [Line Items]
Other acquired intangible assets, net	9,855		9,855		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	7,193		7,193		1,443
Goodwill	43,937		43,937		43,994
Operating Segments [Member] | Government Systems [Member]
Segment Reporting Information [Line Items]
Other acquired intangible assets, net	19,362		19,362		23,024
Goodwill	$ 63,440		$ 63,440		$ 63,438