Goodwill (Details) (USD $)	12 Months Ended
	Dec. 29, 2013	Dec. 30, 2012	Dec. 25, 2011
Goodwill
Balance at the beginning of the period	$ 78,958,000	$ 75,085,000
Acquisitions		3,943,000
Divestitures		(636,000)
Foreign currency adjustments	433,000	566,000
Balance at the end of the period	79,391,000	78,958,000
Denver and Minneapolis markets
Goodwill
Number of restaurants acquired	56
Other Markets
Goodwill
Number of restaurants acquired	1
Domestic Company-owned Restaurants
Goodwill
Balance at the beginning of the period		55,260,000
Acquisitions		3,943,000
Divestitures		(636,000)
Balance at the end of the period	58,567,000	58,567,000
International
Goodwill
Balance at the beginning of the period	19,955,000	19,389,000
Foreign currency adjustments	433,000	566,000
Balance at the end of the period	20,388,000	19,955,000
Goodwill, accumulated impairment	2,300,000	2,300,000	2,300,000
All others
Goodwill
Balance at the beginning of the period			436,000
Balance at the end of the period	$ 436,000	$ 436,000	$ 436,000