Condensed Consolidated Balance Sheets (Parenthetical) - $ / shares	Sep. 28, 2019	Dec. 29, 2018
Statement Of Financial Position [Abstract]
Preferred stock, par value	$ 0.01	$ 0.01
Preferred stock, Shares authorized	10,000,000	10,000,000
Preferred stock, shares outstanding	0	0
Common stock, par value	$ 0.01	$ 0.01
Common stock, Shares authorized	200,000,000	200,000,000
Common stock, shares issued	61,712,000	60,729,000
Common stock, shares outstanding	58,354,000	58,082,000