Note 4 - Taxes on Income (Detail) - Significant components of income taxes from continuing operations: (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2012	Dec. 25, 2011	Dec. 26, 2010
Federal			$ (2,931)
Current			(2,931)
Federal	11,480	10,109	12,331
State	2,151	2,134	2,310
Deferred	13,631	12,243	14,641
Change in reserve for uncertain tax positions		(25)	(1,667)
Income tax expense	$ 13,631	$ 12,218	$ 10,043