Condensed Consolidated Balance Sheets (Parenthetical) - USD ($) $ in Thousands	Sep. 25, 2021	Dec. 26, 2020
Statement Of Financial Position [Abstract]
Allowance for doubtful accounts and customer credits	$ 1,248	$ 1,260
Common stock, par value	$ 0.01	$ 0.01
Common stock, shares authorized	50,000,000	50,000,000
Common stock, shares issued	31,658,703	32,168,740
Common stock, shares outstanding	31,658,703	32,168,740