CONDENSED CONSOLIDATED BALANCE SHEETS (Unaudited) (Parenthetical) - $ / shares	Jul. 11, 2020	Dec. 28, 2019
Statement Of Financial Position [Abstract]
Common stock, par value
Common stock, shares authorized	100,000,000	100,000,000
Common stock, shares outstanding	35,842,000	36,351,000
Preferred stock, par value
Preferred stock, shares authorized	10,000,000	10,000,000
Preferred stock, shares outstanding	0	0