CONSOLIDATED STATEMENTS OF STOCKHOLDERS' EQUITY (Parenthetical)	12 Months Ended
	Dec. 30, 2012	Dec. 25, 2011	Dec. 26, 2010
Treasury stock, purchased	454,860	144,125	78,143
Treasury stock, retired	708,996
Common Class A
Class A shares issued	942,250	587,118	573,347