Segment Information (Details 1) (USD $) In Thousands	Jul. 01, 2011	Apr. 01, 2011
Other net acquired intangible assets and goodwill included in segment assets
Other acquired intangible assets, net	$ 77,088	$ 81,889
Goodwill	83,702	83,532
Government Systems [Member]
Other net acquired intangible assets and goodwill included in segment assets
Other acquired intangible assets, net	10,468	11,157
Goodwill	29,988	30,023
Commercial Networks [Member]
Other net acquired intangible assets and goodwill included in segment assets
Other acquired intangible assets, net	4,517	5,391
Goodwill	43,905	43,700
Satellite Services [Member]
Other net acquired intangible assets and goodwill included in segment assets
Other acquired intangible assets, net	62,103	65,341
Goodwill	$ 9,809	$ 9,809