Acquisitions - Business Acquisition Pro Forma Information (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended
	Mar. 27, 2021	Mar. 28, 2020
Business Combinations [Abstract]
Net sales	$ 470,832	$ 363,617
Income before income taxes	77,288	31,431
Net income	$ 61,317	$ 21,438
Net income per share — basic (in dollars per share)	$ 2.50	$ 0.88
Net income per share — diluted (in dollars per share)	$ 2.46	$ 0.87