Note 9. Fair Value Measurement (Detail) - Financial Assets and Liabilities Categorized Based Upon the Fair Value Hierarchy (USD $) In Thousands, unless otherwise specified	Mar. 31, 2013		Dec. 30, 2012
Financial assets	$ 26,829		$ 20,723
Financial liabilities	295		810
Money Market Funds [Member] | Fair Value, Inputs, Level 1 [Member]
Financial assets	4,359		1,181
Money Market Funds [Member]
Financial assets	4,359	[1]	1,181	[2]
Commercial Paper [Member] | Fair Value, Inputs, Level 2 [Member]
Financial assets	14,984		14,980
Commercial Paper [Member]
Financial assets	14,984	[1]	14,980	[2]
Foreign Currency Forward Contracts [Member] | Fair Value, Inputs, Level 2 [Member]
Financial assets	7,486		3,032
Financial liabilities	44		296
Foreign Currency Forward Contracts [Member]
Financial assets	7,486		3,032
Financial liabilities	44		296
Auction Rate Securities [Member] | Fair Value, Inputs, Level 2 [Member]
Financial assets			1,530
Auction Rate Securities [Member]
Financial assets			1,530
Interest Rate Swaps [Member] | Fair Value, Inputs, Level 2 [Member]
Financial liabilities	251		514
Interest Rate Swaps [Member]
Financial liabilities	251		514
Fair Value, Inputs, Level 1 [Member]
Financial assets	4,359		1,181
Fair Value, Inputs, Level 2 [Member]
Financial assets	22,470		19,542
Financial liabilities	$ 295		$ 810

[1] Total cash and cash equivalents, short-term investments of $309.1 million as of March 31, 2013 includes cash of $253.3 million held in operating accounts, $4.3 million in money market funds, $15.0 million in commercial paper and $36.5 million in FDIC insured certificates of deposit.

[2] Total cash and cash equivalents, short-term investments of $313.9 million as of December 30, 2012 includes cash of $297.7 million held in operating accounts, $1.2 million in money market funds and $15.0 million in commercial paper.