Supplemental Cash Flow Information Supplemental Cash Flow Information (Details) (USD $)	12 Months Ended
	Dec. 31, 2013	Dec. 25, 2012	Dec. 27, 2011
Other Significant Noncash Transactions [Line Items]
Interest Paid	$ 253,000	$ 370,000	$ 390,000
Income Taxes Paid	104,072,000	90,054,000	80,572,000
Non-cash investing and financing activities (in thousands):
Capital Expenditures Incurred but Not yet Paid	16,194,000	6,019,000	6,060,000
Other Noncash Income (Expense)	(589,000)	(475,000)	(634,000)
Costs Incurred, Asset Retirement Obligation Incurred	664,000	2,855,000	474,000
Capital Lease Obligations Incurred	0	3,481,000	0
Milwaukee Franchise Acquisition [Member]
Non-cash investing and financing activities (in thousands):
Business Combination Purchase Price Not Yet Paid	0	0	2,055,000
Indiana Franchisee Acquisition [Member]
Non-cash investing and financing activities (in thousands):
Business Combination Purchase Price Not Yet Paid	0	0	510,000
North Carolina Franchise Acquisition [Member]
Non-cash investing and financing activities (in thousands):
Business Combination Purchase Price Not Yet Paid	0	3,601,000	0
Florida Franchise Acquisition [Member]
Non-cash investing and financing activities (in thousands):
Business Combination Purchase Price Not Yet Paid	270,000	0	0
Fair Value, Inputs, Level 2 [Member]
Non-cash investing and financing activities (in thousands):
Other Noncash Income (Expense)	$ (186,000)	$ (186,000)	$ 156,000