Segment Information (Details 2) (USD $) In Thousands, unless otherwise specified	3 Months Ended		9 Months Ended
	Dec. 30, 2011	Dec. 31, 2010	Dec. 30, 2011	Dec. 31, 2010
Amortization of acquired intangibles by segment
Amortization of acquired intangible assets	$ 4,752	$ 4,923	$ 14,291	$ 14,627
Government Systems [Member]
Amortization of acquired intangibles by segment
Amortization of acquired intangible assets	631	714	1,927	1,806
Commercial Networks [Member]
Amortization of acquired intangibles by segment
Amortization of acquired intangible assets	883	971	2,650	3,107
Satellite Services [Member]
Amortization of acquired intangibles by segment
Amortization of acquired intangible assets	$ 3,238	$ 3,238	$ 9,714	$ 9,714