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RESTRUCTURING ACTIVITIES - Restructuring Activities - Restructuring Expenses and Related Costs (Details) | 3 Months Ended | 9 Months Ended
--- | --- | ---
Sep. 26, 2020 USD ($) | Sep. 26, 2020 USD ($)
Restructuring Cost and Reserve [Line Items] |  |
Restructuring charges | $ 2,910,000 | $ 8,489,000
2020 Plan |  |
Restructuring Cost and Reserve [Line Items] |  |
Expected costs of restructuring plan | 20,000,000 | 20,000,000
ESS |  |
Restructuring Cost and Reserve [Line Items] |  |
Restructuring charges | 902,000 | 2,364,000
Utility |  |
Restructuring Cost and Reserve [Line Items] |  |
Restructuring charges | 579,000 | 4,253,000
Coatings |  |
Restructuring Cost and Reserve [Line Items] |  |
Restructuring charges | 1,284,000 | 1,506,000
Corporate |  |
Restructuring Cost and Reserve [Line Items] |  |
Restructuring charges | 145,000 | 366,000
Total cost of sales |  |
Restructuring Cost and Reserve [Line Items] |  |
Restructuring charges | 1,673,000 | 5,348,000
Total cost of sales | ESS |  |
Restructuring Cost and Reserve [Line Items] |  |
Restructuring charges | 0 | 447,000
Total cost of sales | Utility |  |
Restructuring Cost and Reserve [Line Items] |  |
Restructuring charges | 579,000 | 3,640,000
Total cost of sales | Coatings |  |
Restructuring Cost and Reserve [Line Items] |  |
Restructuring charges | 1,094,000 | 1,261,000
Total cost of sales | Corporate |  |
Restructuring Cost and Reserve [Line Items] |  |
Restructuring charges | 0 | 0
Total selling, general and administrative expenses |  |
Restructuring Cost and Reserve [Line Items] |  |
Restructuring charges | 1,237,000 | 3,141,000
Total selling, general and administrative expenses | ESS |  |
Restructuring Cost and Reserve [Line Items] |  |
Restructuring charges | 902,000 | 1,917,000
Total selling, general and administrative expenses | Utility |  |
Restructuring Cost and Reserve [Line Items] |  |
Restructuring charges | 0 | 613,000
Total selling, general and administrative expenses | Coatings |  |
Restructuring Cost and Reserve [Line Items] |  |
Restructuring charges | 190,000 | 245,000
Total selling, general and administrative expenses | Corporate |  |
Restructuring Cost and Reserve [Line Items] |  |
Restructuring charges | 145,000 | 366,000
Severance | Total cost of sales |  |
Restructuring Cost and Reserve [Line Items] |  |
Restructuring charges | 289,000 | 823,000
Severance | Total cost of sales | ESS |  |
Restructuring Cost and Reserve [Line Items] |  |
Restructuring charges | 0 | 399,000
Severance | Total cost of sales | Utility |  |
Restructuring Cost and Reserve [Line Items] |  |
Restructuring charges | 0 | 0
Severance | Total cost of sales | Coatings |  |
Restructuring Cost and Reserve [Line Items] |  |
Restructuring charges | 289,000 | 424,000
Severance | Total cost of sales | Corporate |  |
Restructuring Cost and Reserve [Line Items] |  |
Restructuring charges | 0 | 0
Severance | Total selling, general and administrative expenses |  |
Restructuring Cost and Reserve [Line Items] |  |
Restructuring charges | 30,000 | 1,161,000
Severance | Total selling, general and administrative expenses | ESS |  |
Restructuring Cost and Reserve [Line Items] |  |
Restructuring charges | 0 | 242,000
Severance | Total selling, general and administrative expenses | Utility |  |
Restructuring Cost and Reserve [Line Items] |  |
Restructuring charges | 0 | 613,000
Severance | Total selling, general and administrative expenses | Coatings |  |
Restructuring Cost and Reserve [Line Items] |  |
Restructuring charges | 30,000 | 85,000
Severance | Total selling, general and administrative expenses | Corporate |  |
Restructuring Cost and Reserve [Line Items] |  |
Restructuring charges | 0 | 221,000
Other cash restructuring expenses | Total cost of sales |  |
Restructuring Cost and Reserve [Line Items] |  |
Restructuring charges | 831,000 | 1,714,000
Other cash restructuring expenses | Total cost of sales | ESS |  |
Restructuring Cost and Reserve [Line Items] |  |
Restructuring charges | 0 | 48,000
Other cash restructuring expenses | Total cost of sales | Utility |  |
Restructuring Cost and Reserve [Line Items] |  |
Restructuring charges | 267,000 | 1,070,000
Other cash restructuring expenses | Total cost of sales | Coatings |  |
Restructuring Cost and Reserve [Line Items] |  |
Restructuring charges | 564,000 | 596,000
Other cash restructuring expenses | Total cost of sales | Corporate |  |
Restructuring Cost and Reserve [Line Items] |  |
Restructuring charges | 0 | 0
Other cash restructuring expenses | Total selling, general and administrative expenses |  |
Restructuring Cost and Reserve [Line Items] |  |
Restructuring charges | 1,207,000 | 1,980,000
Other cash restructuring expenses | Total selling, general and administrative expenses | ESS |  |
Restructuring Cost and Reserve [Line Items] |  |
Restructuring charges | 902,000 | 1,675,000
Other cash restructuring expenses | Total selling, general and administrative expenses | Utility |  |
Restructuring Cost and Reserve [Line Items] |  |
Restructuring charges | 0 | 0
Other cash restructuring expenses | Total selling, general and administrative expenses | Coatings |  |
Restructuring Cost and Reserve [Line Items] |  |
Restructuring charges | 160,000 | 160,000
Other cash restructuring expenses | Total selling, general and administrative expenses | Corporate |  |
Restructuring Cost and Reserve [Line Items] |  |
Restructuring charges | 145,000 | 145,000
Asset impairments | Total cost of sales |  |
Restructuring Cost and Reserve [Line Items] |  |
Restructuring charges | 553,000 | 2,811,000
Asset impairments | Total cost of sales | ESS |  |
Restructuring Cost and Reserve [Line Items] |  |
Restructuring charges | 0 | 0
Asset impairments | Total cost of sales | Utility |  |
Restructuring Cost and Reserve [Line Items] |  |
Restructuring charges | 312,000 | 2,570,000
Asset impairments | Total cost of sales | Coatings |  |
Restructuring Cost and Reserve [Line Items] |  |
Restructuring charges | 241,000 | 241,000
Asset impairments | Total cost of sales | Corporate |  |
Restructuring Cost and Reserve [Line Items] |  |
Restructuring charges | $ 0 | $ 0

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