Note 6. Income Tax (Details) (USD $)	3 Months Ended		9 Months Ended
	Sep. 30, 2013	Sep. 23, 2012	Sep. 30, 2013	Sep. 23, 2012
Note 6. Income Tax (Details) [Line Items]
Income Tax Expense (Benefit)	$ 2,517,000	$ 3,406,000	$ 7,725,000	$ 10,223,000
Deferred Income Tax Expense (Benefit)	3,300,000	3,400,000	9,800,000	10,200,000
Income Tax Expense (Benefit), Intraperiod Tax Allocation			(2,128,000)
Impact from "Naked Credit" [Member]
Note 6. Income Tax (Details) [Line Items]
Income Tax Expense (Benefit), Intraperiod Tax Allocation	$ 800,000		$ 2,100,000