Income Taxes - Components of Net Deferred Tax Assets (Detail) (USD $) In Thousands, unless otherwise specified	Mar. 29, 2013	Mar. 30, 2012
Deferred tax assets:
Net operating loss carryforwards	$ 240,402	$ 163,548
Tax credit carryforwards	82,910	64,013
Warranty reserve	5,325	4,482
Accrued compensation	5,846	5,547
Deferred rent	3,618	3,390
Inventory reserve	7,578	6,069
Stock-based compensation	8,214	9,793
Contract accounting	3,018	768
Other	7,775	8,027
Valuation allowance	(15,965)	(14,695)
Total deferred tax assets	348,721	250,942
Deferred tax liabilities:
Property, equipment and satellites and intangible assets	(227,965)	(180,096)
Total deferred tax liabilities	(227,965)	(180,096)
Net deferred tax assets	$ 120,756	$ 70,846