CONSOLIDATED STATEMENTS OF CHANGES IN STOCKHOLDERS' EQUITY (Parenthetical)	12 Months Ended
	Dec. 30, 2012	Dec. 25, 2011	Dec. 26, 2010
Retirement units, shares	0	0	18,038
Employee stock purchase plans, shares	0	603,114	722,916
Stock options, shares	176,400	100,200	257,600
Stock conversions, shares	500	240	6,350
Restricted stock unit vested, shares	92,847	210,769	203,566
401(k) - Company stock match, shares	490,031	781,088	435,895