Earnings Per Share - Schedule of Basic and Diluted Earnings Per Share (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	3 Months Ended						9 Months Ended
	Sep. 26, 2020	Jun. 27, 2020	Mar. 28, 2020	Sep. 30, 2019	Jun. 30, 2019	Mar. 31, 2019	Sep. 26, 2020	Sep. 30, 2019
Earnings Per Share [Abstract]
Net income	$ 8,091	$ 7,424	$ (4,404)	$ 6,560	$ 5,526	$ 7,576	$ 11,111	$ 19,662
Basic	48,900			25,079			49,231	25,012
Employee stock options, employee stock purchase grants and restricted stock units - dilutive shares	231			226			320	242
Diluted earnings per share - weighted average shares outstanding	49,131			25,305			49,551	25,254
Basic	$ 0.17			$ 0.26			$ 0.23	$ 0.79
Diluted	$ 0.16			$ 0.26			$ 0.22	$ 0.78