Income Taxes (Details 1) (USD $) In Thousands, unless otherwise specified	Mar. 30, 2012	Apr. 01, 2011
Deferred tax assets:
Net operating loss carryforwards	$ 163,548	$ 79,930
Tax credit carryforwards	64,013	46,355
Warranty reserve	4,482	5,086
Accrued compensation	5,547	5,125
Deferred rent	3,390	2,673
Inventory reserve	6,069	4,899
Stock-based compensation	9,793	8,830
Contract accounting	768	1,415
Other	8,027	8,060
Valuation allowance	(14,695)	(12,671)
Total deferred tax assets	250,942	149,702
Deferred tax liabilities:
Property, equipment and satellites and intangible assets	(180,096)	(87,254)
Total deferred tax liabilities	(180,096)	(87,254)
Net deferred tax assets	$ 70,846	$ 62,448