Segment Information - Amortization of Acquired Intangibles by Segment (Detail) (USD $) In Thousands, unless otherwise specified	3 Months Ended		9 Months Ended
	Dec. 28, 2012	Dec. 30, 2011	Dec. 28, 2012	Dec. 30, 2011
Segment Reporting Information [Line Items]
Amortization of acquired intangible assets	$ 3,960	$ 4,752	$ 12,065	$ 14,291
Satellite Services [Member]
Segment Reporting Information [Line Items]
Amortization of acquired intangible assets	3,159	3,238	9,635	9,714
Commercial Networks [Member]
Segment Reporting Information [Line Items]
Amortization of acquired intangible assets	163	883	523	2,650
Government Systems [Member]
Segment Reporting Information [Line Items]
Amortization of acquired intangible assets	$ 638	$ 631	$ 1,907	$ 1,927