EARNINGS PER SHARE - Earnings Per Share (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 26, 2020	Sep. 28, 2019	Sep. 26, 2020	Sep. 28, 2019
Reconciliation of shares for basic and diluted net income per share
Net income	$ 51,445	$ 21,302	$ 93,407	$ 45,692
Weighted average common shares outstanding—basic (in shares)	87,032	85,285	86,933	84,686
Effect of dilutive securities (in shares)	1,062	1,088	744	1,466
Weighted average common shares outstanding—diluted (in shares)	88,094	86,373	87,677	86,152
Earnings per share
Basic (in dollars per share)	$ 0.59	$ 0.25	$ 1.07	$ 0.54
Diluted (in dollars per share)	$ 0.58	$ 0.25	$ 1.07	$ 0.53