Note 3. Balance Sheet Components (Detail) - Balance Sheet Components (USD $) In Thousands, unless otherwise specified	Mar. 31, 2013	Dec. 30, 2012	Mar. 25, 2012	Dec. 25, 2011
Cash and cash equivalents
Cash	$ 253,305	$ 258,126
Cash equivalents:
Money market funds	4,359	1,181
Cash and cash equivalents	261,732	262,177	197,025	194,850
Short-term investments
Commercial paper	14,984	14,980
Short-term investments	47,398	51,720
Account receivable, net
Accounts receivable, gross	106,829	107,127
Allowance for doubtful accounts	(227)	(263)
Account receivable, net	106,602	106,864
Inventories
Raw materials	8,767	8,647
Work-in-process	139,355	149,722
Finished goods	31,526	23,823
Inventories	179,648	182,192
Property, plant and equipment, net
Land	45,168	45,168
Buildings and leasehold improvements	60,975	59,807
Equipment	347,258	341,129
Construction in progress	9,604	11,694
Accumulated depreciation and amortization	(292,182)	(281,069)
Property, plant and equipment, net	170,823	176,728
Accrued Compensation and Benefits
Accrued Vacation	8,183	9,404
Others	11,810	16,676
Accrued Compensation and Benefits	19,993	26,080
Cash and Cash Equivalents [Member]
Cash equivalents:
FDIC insured certificates of deposit	4,068	2,870
Short-term Investments [Member]
Cash equivalents:
FDIC insured certificates of deposit	$ 32,414	$ 36,740