LEASES - Lease Cost (Details) $ in Thousands	3 Months Ended	6 Months Ended
	Jun. 29, 2019 USD ($)	Jun. 29, 2019 USD ($)
Leases [Abstract]
Operating lease cost	$ 5,174	$ 10,469
Short-term lease cost	669	1,269
Total lease cost	5,843	11,738
Operating cash outflows from operating leases	5,421	11,467
ROU assets obtained in exchange for lease obligations	$ 1,195	$ 2,431
Weighted average remaining lease term	10 years	10 years
Weighted average discount rate (percent)	3.90%	3.90%