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Cash, Cash Equivalents and Short-Term Investments - Effective Maturities of Short-Term Investments (Detail) (USD $) In Thousands, unless otherwise specified	Dec. 29, 2012
Amortized Cost [Member]
Schedule of Available-for-sale Securities [Line Items]
Securities amortized cost, Due in one year or less	$ 7,407
Estimated Fair Value [Member]
Schedule of Available-for-sale Securities [Line Items]
Securities fair value, Due in one year or less	$ 7,421

Amount of available-for-sale debt securities at cost, net of adjustments, maturing in the next fiscal year following the latest fiscal year. Adjustments include, but are not limited to, accretion, amortization, collection of cash, previous other-than-temporary impairments (OTTI) recognized in earnings (less any cumulative-effect adjustments, as defined) and fair value hedge accounting adjustments.

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