Condensed Consolidated Balance Sheets (Parenthetical) - USD ($) $ in Thousands	Mar. 27, 2021	Dec. 26, 2020
Statement Of Financial Position [Abstract]
Allowance for doubtful accounts and customer credits	$ 1,210	$ 1,260
Accumulated amortization of intangible assets	$ 10,040	$ 9,194
Common stock, par value	$ 0.01	$ 0.01
Common stock, shares authorized	50,000,000	50,000,000
Common stock, shares issued	32,115,528	32,168,740
Common stock, shares outstanding	32,115,528	32,168,740