Fair Value Measurement (Details) (USD $)	12 Months Ended
	Dec. 25, 2012 restaurant	Dec. 27, 2011 restaurant
Fair value of financial instruments
Interest rate swaps	$ (4,016,000)	$ (4,247,000)
Depreciation expense		100,000
Number of underperforming restaurants related to goodwill	1	2
Fair value measured on a recurring basis
Fair value of financial instruments
Total	(4,031,000)	(4,213,000)
Fair value measured on a recurring basis | Level 1
Fair value of financial instruments
Deferred compensation plan - assets	9,145,000	6,748,000
Deferred compensation plan - liabilities	(9,160,000)	(6,714,000)
Fair value measured on a recurring basis | Level 2
Fair value of financial instruments
Interest rate swaps	(4,016,000)	(4,247,000)
Fair value measured on a nonrecurring basis
Fair value of financial instruments
Total	3,077,000	3,653,000
Total losses	465,000
Fair value measured on a nonrecurring basis | Level 2
Fair value of financial instruments
Long-lived assets held for sale	1,398,000	1,398,000
Long-lived assets held for use	939,000	1,017,000
Fair value measured on a nonrecurring basis | Level 3
Fair value of financial instruments
Goodwill and intangible assets	740,000	1,238,000
Total losses	$ 465,000