Supplemental Cash Flow Information Supplemental Cash Flow Information (Details) (USD $)	12 Months Ended
	Dec. 25, 2012	Dec. 27, 2011	Dec. 28, 2010
Other Significant Noncash Transactions [Line Items]
Interest Paid	$ 370,000	$ 390,000	$ 379,000
Income Taxes Paid	90,054,000	80,572,000	68,263,000
Non-cash investing and financing activities (in thousands):
Capital Expenditures Incurred but Not yet Paid	6,019,000	6,060,000	6,547,000
Notes Receivable, Related Parties	0	0	3,333,000
Other Noncash Income (Expense)	(4,470,000)	(2,423,000)	(1,114,000)
Costs Incurred, Asset Retirement Obligation Incurred	2,855,000	474,000	554,000
Capital Lease Obligations Incurred	3,481,000	0	0
New Jersey Franchisee Acquisition [Member]
Non-cash investing and financing activities (in thousands):
Business Combination Purchase Price Not Yet Paid	0	0	2,755,000
Milwaukee Franchise Acquisition [Member]
Non-cash investing and financing activities (in thousands):
Business Combination Purchase Price Not Yet Paid	0	2,055,000	0
Indiana Franchisee Acquisition [Member]
Non-cash investing and financing activities (in thousands):
Business Combination Purchase Price Not Yet Paid	0	510,000	0
North Carolina Franchise Acquisition [Member]
Non-cash investing and financing activities (in thousands):
Business Combination Purchase Price Not Yet Paid	3,601,000	0	0
Paradise Subsidiary [Member]
Non-cash investing and financing activities (in thousands):
Business Combination Purchase Price Not Yet Paid	0	0	764,000
Fair Value, Inputs, Level 2 [Member]
Non-cash investing and financing activities (in thousands):
Other Noncash Income (Expense)	$ (186,000)	$ 156,000	$ 1,517,000