LEASES - Lease Cost (Details) $ in Thousands	3 Months Ended	9 Months Ended
	Sep. 28, 2019 USD ($)	Sep. 28, 2019 USD ($)
Leases [Abstract]
Operating lease cost	$ 5,002	$ 15,471
Short-term lease cost	650	1,919
Total lease cost	5,652	17,390
Operating cash outflows from operating leases	5,499	16,966
ROU assets obtained in exchange for lease obligations	$ 626	$ 3,057
Weighted average remaining lease term	10 years	10 years
Weighted average discount rate	3.90%	3.90%