Segment Information - Other Net Acquired Intangible Assets, Net and Goodwill Included in Segment Assets and Amortization of Acquired Intangible Assets by Segment (Detail) (USD $) In Thousands, unless otherwise specified	3 Months Ended		9 Months Ended
	Jan. 02, 2015	Jan. 03, 2014	Jan. 02, 2015	Jan. 03, 2014	Apr. 04, 2014
Segment Reporting Information [Line Items]
Other acquired intangible assets, net	$ 46,529		$ 46,529		$ 35,397
Goodwill	117,276		117,276		83,627
Amortization of acquired intangible assets	4,651	3,652	13,338	10,949
Satellite Services [Member]
Segment Reporting Information [Line Items]
Amortization of acquired intangible assets	2,765	2,765	8,295	8,295
Satellite Services [Member] | Operating Segments [Member]
Segment Reporting Information [Line Items]
Other acquired intangible assets, net	20,636		20,636		28,931
Goodwill	9,809		9,809		9,809
Commercial Networks [Member]
Segment Reporting Information [Line Items]
Amortization of acquired intangible assets	369	343	1,084	994
Commercial Networks [Member] | Operating Segments [Member]
Segment Reporting Information [Line Items]
Other acquired intangible assets, net	1,811		1,811		2,583
Goodwill	43,936		43,936		44,148
Government Systems [Member]
Segment Reporting Information [Line Items]
Amortization of acquired intangible assets	1,517	544	3,959	1,660
Government Systems [Member] | Operating Segments [Member]
Segment Reporting Information [Line Items]
Other acquired intangible assets, net	24,082		24,082		3,883
Goodwill	$ 63,531		$ 63,531		$ 29,670