Earnings Per Share - Computation of Basic and Diluted Earnings Per Share (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	3 Months Ended				6 Months Ended
	Jun. 27, 2020	Mar. 28, 2020	Jun. 29, 2019	Mar. 30, 2019	Jun. 27, 2020	Jun. 29, 2019
Numerator:
Net (loss) income as reported	$ (8,991)	$ 24,644	$ 43,792	$ 36,989	$ 15,653	$ 80,781
Weighted average shares outstanding
Basic (in shares)	24,312		24,740		24,353	24,729
Effect of dilutive securities (in shares)	0		243		167	269
Diluted (in shares)	24,312		24,983		24,520	24,998
(Loss) Earnings Per Share:
Basic (loss) earnings per share (in dollars per share)	$ (0.37)		$ 1.77		$ 0.64	$ 3.27
Diluted (loss) earnings per share (in dollars per share)	$ (0.37)		$ 1.75		$ 0.64	$ 3.23