RESTRUCTURING ACTIVITIES - Narrative (Details) - USD ($) $ in Thousands	3 Months Ended	12 Months Ended
	Mar. 31, 2018	Dec. 29, 2018
Restructuring Cost and Reserve [Line Items]
Restructuring charges	$ 4,400
Total cost of sales
Restructuring Cost and Reserve [Line Items]
Restructuring charges	2,340
Selling, General and Administrative Expenses
Restructuring Cost and Reserve [Line Items]
Restructuring charges	2,060
ESS
Restructuring Cost and Reserve [Line Items]
Restructuring charges	3,628
ESS | Total cost of sales
Restructuring Cost and Reserve [Line Items]
Restructuring charges	1,568	$ 23,515
ESS | Selling, General and Administrative Expenses
Restructuring Cost and Reserve [Line Items]
Restructuring charges	$ 2,060	$ 18,460