Goodwill and Acquired Intangible Assets (Details 1) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Mar. 30, 2012 Y	Apr. 01, 2011
Allocation of other acquired intangible assets and related accumulated amortization
Other acquired intangible assets, gross	$ 163,585	$ 176,121
Other acquired intangible assets, accumulated amortization	(100,544)	(94,232)
Other acquired intangible assets, net	63,041	81,889
Technology [Member]
Allocation of other acquired intangible assets and related accumulated amortization
Weighted average useful life	6
Other acquired intangible assets, gross	54,240	54,344
Other acquired intangible assets, accumulated amortization	(47,959)	(43,930)
Other acquired intangible assets, net	6,281	10,414
Contracts and customer relationships [Member]
Allocation of other acquired intangible assets and related accumulated amortization
Weighted average useful life	7
Other acquired intangible assets, gross	88,758	88,834
Other acquired intangible assets, accumulated amortization	(39,966)	(28,597)
Other acquired intangible assets, net	48,792	60,237
Non-compete agreements [Member]
Allocation of other acquired intangible assets and related accumulated amortization
Weighted average useful life	4
Other acquired intangible assets, gross	413	9,332
Other acquired intangible assets, accumulated amortization	(267)	(9,101)
Other acquired intangible assets, net	146	231
Satellite co-location rights [Member]
Allocation of other acquired intangible assets and related accumulated amortization
Weighted average useful life	9
Other acquired intangible assets, gross	8,600	8,600
Other acquired intangible assets, accumulated amortization	(2,119)	(1,194)
Other acquired intangible assets, net	6,481	7,406
Trade Names [Member]
Allocation of other acquired intangible assets and related accumulated amortization
Weighted average useful life	3
Other acquired intangible assets, gross	5,680	5,680
Other acquired intangible assets, accumulated amortization	(4,339)	(2,446)
Other acquired intangible assets, net	1,341	3,234
Other intangibles [Member]
Allocation of other acquired intangible assets and related accumulated amortization
Weighted average useful life	6
Other acquired intangible assets, gross	5,894	9,331
Other acquired intangible assets, accumulated amortization	(5,894)	(8,964)
Other acquired intangible assets, net		$ 367