Note 14 - Shareholders' Equity (Detail) - Reconciliation of Outstanding Stock Options (USD $) In Thousands, except Share data, unless otherwise specified	12 Months Ended
Dec. 29, 2012
Outstanding December 31, 2011	1,064,251
Outstanding December 31, 2011 (in Dollars per share)	$ 34.42
Outstanding December 29, 2012	788,450
Outstanding December 29, 2012 (in Dollars per share)	$ 40.53
Outstanding December 29, 2012	3 years 109 days
Outstanding December 29, 2012 (in Dollars)	$ 15,895
Exercisable December 29, 2012	522,263
Exercisable December 29, 2012 (in Dollars per share)	$ 35.64
Exercisable December 29, 2012	2 years 109 days
Exercisable December 29, 2012 (in Dollars)	$ 12,774
Granted	128,140
Granted (in Dollars per share)	$ 63.09
Exercised	(377,094)
Exercised (in Dollars per share)	$ 30.73
Forfeited	(26,847)
Forfeited (in Dollars per share)	$ 43.45

Amount of difference between fair value of the underlying shares reserved for issuance and exercise price of vested portions of options outstanding and currently exercisable.

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The number of shares into which fully or partially vested stock options outstanding as of the balance sheet date can be currently converted under the option plan.

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The weighted-average price as of the balance sheet date at which grantees can acquire the shares reserved for issuance on vested portions of options outstanding and currently exercisable under the stock option plan.

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The number of shares reserved for issuance under stock option agreements awarded under the plan that validly exist and are outstanding as of the balance sheet date, including vested options.

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Weighted average remaining contractual term for option awards outstanding, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

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