Other Net Acquired Intangible Assets and Goodwill Included in Segment Assets (Detail) (USD $) In Thousands, unless otherwise specified	Sep. 28, 2012	Mar. 30, 2012
Segment Reporting Information [Line Items]
Other acquired intangible assets, net	$ 55,059	$ 63,041
Goodwill	83,537	83,461
Satellite Services [Member]
Segment Reporting Information [Line Items]
Other acquired intangible assets, net	45,914	52,390
Goodwill	9,809	9,809
Commercial Networks [Member]
Segment Reporting Information [Line Items]
Other acquired intangible assets, net	1,825	2,186
Goodwill	43,670	43,739
Government Systems [Member]
Segment Reporting Information [Line Items]
Other acquired intangible assets, net	7,320	8,465
Goodwill	$ 30,058	$ 29,913