Segment Information - Amortization of Acquired Intangibles by Segment (Detail) (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Jun. 28, 2013	Jun. 29, 2012
Segment Reporting Information [Line Items]
Amortization of acquired intangible assets	$ 3,501	$ 4,064
Satellite Services [Member]
Segment Reporting Information [Line Items]
Amortization of acquired intangible assets	2,765	3,238
Commercial Networks [Member]
Segment Reporting Information [Line Items]
Amortization of acquired intangible assets	143	184
Government Systems [Member]
Segment Reporting Information [Line Items]
Amortization of acquired intangible assets	$ 593	$ 642