LEASES - Lease Cost (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Oct. 02, 2021	Sep. 26, 2020	Oct. 02, 2021	Sep. 26, 2020
Leases [Abstract]
Operating lease costs	$ 3,571	$ 2,410	$ 8,647	$ 7,021
Finance lease cost - amortization of right-of-use assets	467	53	582	159
Finance lease cost - interest on lease liabilities	57	15	86	49
Short-term lease cost	113	36	268	140
Variable lease cost	946	838	2,794	2,492
Sublease income	(186)	(186)	(557)	(557)
Total lease cost	$ 4,968	$ 3,166	$ 11,820	$ 9,304
Weighted average remaining lease term:
Operating leases	5 years 11 months 8 days	6 years 4 months 20 days	5 years 11 months 8 days	6 years 4 months 20 days
Finance leases	4 years 7 months 6 days	3 years 11 months 4 days	4 years 7 months 6 days	3 years 11 months 4 days
Weighted average discount rate:
Operating leases	4.87%	6.52%	4.87%	6.52%
Finance leases	2.25%	6.24%	2.25%	6.24%