Consolidated Balance Sheets (Parenthetical) (USD $) In Thousands, except Share data, unless otherwise specified	Mar. 29, 2015	Dec. 28, 2014
Property and equipment, accumulated depreciation	$ 211,304	$ 206,448
Franchise rights, accumulated amortization	84,297	83,184
Franchise agreements, accumulated amortization	7,796	7,502
Favorable leases, accumulated amortization	956	841
Unfavorable leases, accumulated amortization	$ 2,572	$ 2,240
Preferred stock, par value	$ 0.01	$ 0.01
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	35,499,066	35,222,667
Common stock, shares, outstanding	34,895,803	34,827,240