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RESTRUCTURING ACTIVITIES - Narrative (Details) - USD ($) | 3 Months Ended | 9 Months Ended | 12 Months Ended
--- | --- | --- | ---
Sep. 24, 2016 | Sep. 26, 2015 | Dec. 31, 2016
Broad Restructuring Plan |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |
Restructuring charges |  | $ 4,581,000 |
2016 Plan |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |
Restructuring charges |  |  | $ 7,825,000
Asset impairments/net loss on disposals | 2016 Plan |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |
Restructuring charges |  |  | 1,099,000
Cost of Sales | 2016 Plan |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |
Restructuring charges |  |  | 5,045,000
Selling, General and Administrative Expenses | 2016 Plan |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |
Restructuring charges |  |  | $ 2,780,000
Energy & Mining | 2016 Plan |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |
Restructuring charges | $ 1,607,000 |  |
Coatings Segment | 2016 Plan |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |
Restructuring charges | 305,000 |  |
Corporate | 2016 Plan |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |
Restructuring charges | $ 225,000 |  |

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