Earnings Per Share - Computation of Basic and Diluted Earnings Per Share (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	3 Months Ended
	Mar. 27, 2021	Mar. 28, 2020
Numerator:
Net income as reported	$ 57,713	$ 24,644
Weighted average shares outstanding
Basic (in shares)	24,532	24,393
Effect of dilutive securities (in shares)	360	185
Diluted (in shares)	24,892	24,578
Earnings Per Share:
Basic (loss) earnings per share (in dollars per share)	$ 2.35	$ 1.01
Diluted (loss) earnings per share (in dollars per share)	$ 2.32	$ 1.00