Consolidated Balance Sheets (Parenthetical) (USD $) In Thousands, except Share data, unless otherwise specified	Mar. 31, 2013	Dec. 30, 2012
Franchise agreements, accumulated amortization	$ 7,462	$ 7,188
Favorable leases, accumulated amortization	261	183
Unfavorable leases, accumulated amortization	725	508
Franchise rights, accumulated amortization	75,692	74,699
Property and equipment, accumulated depreciation	$ 177,891	$ 171,024
Preferred stock, par value	$ 0	$ 0
Preferred stock, shares authorized	20,000,000	20,000,000
Preferred stock, shares issued	100	100
Preferred stock, shares outstanding	100	100
Common stock, par value	$ 0.01	$ 0.01
Common stock, shares authorized	100,000,000	100,000,000
Common stock, shares issued	23,668,936	23,682,869
Common stock, shares, outstanding	22,894,633	22,748,241