Note 4. Income Tax (Detail) (USD $)	3 Months Ended		6 Months Ended		12 Months Ended
	Jun. 24, 2012	Jun. 26, 2011	Jun. 24, 2012	Jun. 26, 2011	Dec. 25, 2012
Income Tax Expense (Benefit)	$ 3,409,000	$ 2,558,000	$ 6,817,000	$ 5,154,000
Valuation Allowance, Deferred Tax Asset, Change in Amount	3,400,000	3,600,000
Income Tax Expense (Benefit), Continuing Operations, Discontinued Operations, Extraordinary Items	6,000,000	6,000,000
Deferred Income Tax Expense (Benefit)					14,000,000
Intraperiod Allocation Items in Other Comprehensive Income [Member]
Income Tax Expense (Benefit)		$ (1,000,000)