DEFINED BENEFIT PLANS - Periodic Benefits Cost (Details) - USD ($) $ in Thousands	3 Months Ended
	Apr. 03, 2021	Apr. 04, 2020
Defined Benefit Plan Disclosure [Line Items]
Service cost	$ 14	$ 11
Interest cost	635	802
Expected return on assets	(1,360)	(1,398)
Amortization of prior service cost	16	16
Amortization of net actuarial loss	104	753
Net periodic benefit cost (income)	(591)	184
OPEB Plans
Defined Benefit Plan Disclosure [Line Items]
Service cost	4	4
Interest cost	44	59
Amortization of net actuarial loss	18	27
Net periodic benefit cost (income)	$ 66	$ 90