Segment Information - Other Net Acquired Intangible Assets and Goodwill Included in Segment Assets (Detail) (USD $) In Thousands, unless otherwise specified	Dec. 28, 2012	Mar. 30, 2012
Segment Reporting Information [Line Items]
Other acquired intangible assets, net	$ 51,069	$ 63,041
Goodwill	83,561	83,461
Satellite Services [Member]
Segment Reporting Information [Line Items]
Other acquired intangible assets, net	42,755	52,390
Goodwill	9,809	9,809
Commercial Networks [Member]
Segment Reporting Information [Line Items]
Other acquired intangible assets, net	1,662	2,186
Goodwill	43,729	43,739
Government Systems [Member]
Segment Reporting Information [Line Items]
Other acquired intangible assets, net	6,652	8,465
Goodwill	$ 30,023	$ 29,913