Note 4 - Taxes on Income (Detail) - Reconciliation of the beginning and ending balances of the gross liability for uncertain tax positions: (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 25, 2011	Dec. 26, 2010	Dec. 31, 2012
Uncertain tax position liability, balance	$ 1,428	$ 8,146	$ 1,422
Additions for tax positions for prior years	67	381
Reductions for tax positions for prior years	(73)	(1,858)
Decreases due to settlements		(5,241)
Uncertain tax position liability, balance	$ 1,422	$ 1,428	$ 1,422