RESTRUCTURING ACTIVITIES (Details 2) - Broad Restructuring Plan $ in Thousands	Dec. 29, 2018 USD ($)
Restructuring Cost and Reserve [Line Items]
Restructuring and related cost, expected cost remaining	$ 4,581
Engineered Support Structures | Selling, General and Administrative Expenses
Restructuring Cost and Reserve [Line Items]
Restructuring and related cost, expected cost remaining	1,040
Utility Support Structures | Cost of Sales
Restructuring Cost and Reserve [Line Items]
Restructuring and related cost, expected cost remaining	528
Coatings | Selling, General and Administrative Expenses
Restructuring Cost and Reserve [Line Items]
Restructuring and related cost, expected cost remaining	602
Irrigation | Selling, General and Administrative Expenses
Restructuring Cost and Reserve [Line Items]
Restructuring and related cost, expected cost remaining	468
Other | Selling, General and Administrative Expenses
Restructuring Cost and Reserve [Line Items]
Restructuring and related cost, expected cost remaining	$ 1,943