Supplemental Cash Flow Information Supplemental Cash Flow Information (Details) - USD ($)	12 Months Ended
	Dec. 29, 2015	Dec. 30, 2014	Dec. 31, 2013
Other Significant Noncash Transactions [Line Items]
Interest Paid	$ 3,073,000	$ 773,000	$ 253,000
Income Taxes Paid	92,964,000	91,187,000	104,072,000
Non-cash investing and financing activities (in thousands):
Change in Accrued Capital Expenditures	(2,894,000)	15,479,000	16,194,000
Noncash or Part Noncash Acquisition, Fixed Assets Acquired	12,680,000	0	0
Other Noncash Income (Expense)	(3,505,000)	(4,617,000)	(6,353,000)
Costs Incurred, Asset Retirement Obligation Incurred	635,000	9,341,000	664,000
Florida Franchise Acquisition [Member]
Non-cash investing and financing activities (in thousands):
Business Combination Purchase Price Not Yet Paid	0	0	270,000
Fair Value, Inputs, Level 2 [Member]
Non-cash investing and financing activities (in thousands):
Other Noncash Income (Expense)	$ (186,000)	$ (186,000)	$ (186,000)