Amount of investment in debt and equity securities categorized neither as held-to-maturity nor trading.

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+ Details

Additional Balance Sheet And Cash Flow Information (Marketable Securities) (Detail) (USD $) In Thousands, unless otherwise specified	Jul. 01, 2012	Dec. 31, 2011	Jun. 26, 2011
Restricted Cash and Cash Equivalents Items [Line Items]
Available-for-sale securities	$ 135,848	$ 153,380	$ 244,555
U.S. Treasuries [Member]
Restricted Cash and Cash Equivalents Items [Line Items]
Available-for-sale securities			49,999
Corporate Bonds [Member]
Restricted Cash and Cash Equivalents Items [Line Items]
Available-for-sale securities	$ 135,848	$ 153,380	$ 194,556