RESTRUCTURING ACTIVITIES - Pre-tax Restructuring Expenses Recognized (Details) - USD ($)	3 Months Ended	9 Months Ended	12 Months Ended
	Sep. 24, 2016	Sep. 26, 2015	Dec. 31, 2016
2016 Plan
Restructuring Cost and Reserve [Line Items]
Restructuring charges			$ 7,825,000
2016 Plan | Cost of Sales
Restructuring Cost and Reserve [Line Items]
Restructuring charges			5,045,000
2016 Plan | Selling, General and Administrative Expenses
Restructuring Cost and Reserve [Line Items]
Restructuring charges			2,780,000
2016 Plan | Asset impairments/net loss on disposals
Restructuring Cost and Reserve [Line Items]
Restructuring charges			$ 1,099,000
2016 Plan | Energy & Mining
Restructuring Cost and Reserve [Line Items]
Restructuring charges	$ 1,607,000
2016 Plan | Coatings
Restructuring Cost and Reserve [Line Items]
Restructuring charges	$ 305,000
Broad Restructuring Plan
Restructuring Cost and Reserve [Line Items]
Restructuring charges		$ 4,581,000