Consolidated Balance Sheets (Parenthetical) - USD ($) $ in Thousands	Sep. 27, 2015	Dec. 28, 2014
Property and equipment, accumulated depreciation	$ 219,623	$ 206,448
Franchise rights, accumulated amortization	86,618	83,184
Franchise agreements, accumulated amortization	8,126	7,502
Favorable leases, accumulated amortization	1,247	841
Unfavorable leases, accumulated amortization	$ 3,226	$ 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	35,508,660	35,222,667
Common stock, shares, outstanding	35,036,710	34,827,240