Restaurant Impairment and Dispositions (Restaurant Impairment and Disposition Losses (Gains)) (Detail) (USD $)	12 Months Ended
	Dec. 25, 2011	Dec. 26, 2010		Dec. 27, 2009
Restaurant Impairment and Dispositions [Line Items]
Net book value of divested restaurants		$ 2,828,000		$ 659,000
Cash proceeds received		1,397,000		830,000
Fair value of notes receivable		1,431,000	[1]	312,000	[1]
Total consideration at fair value		2,828,000	[1]	1,142,000	[1]
Gain on restaurants sold				(483,000)
(Gain) loss on domestic restaurant closures	(203,000)	95,000		1,140,000
Adjustment to long-lived asset impairment reserves	117,000	158,000
Total restaurant impairment and disposition (gains) losses	(86,000)	253,000		657,000
Domestic Company-owned Restaurant [Member]
Restaurant Impairment and Dispositions [Line Items]
Number of restaurants sold		12		12
Notes receivable received as part of agreements to sell restaurants		$ 1,400,000		$ 500,000

[1] We sold 12 Company-owned restaurants to franchisees in 2010 and 2009. As a part of the agreements to sell the restaurants, we received notes receivable totaling $1.4 million in 2010 and $500,000 (fair value of $312,000) in 2009.