RESTRUCTURING ACTIVITIES (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2016	Dec. 26, 2015	Dec. 30, 2017
Restructuring Cost and Reserve [Line Items]
Goodwill impairment	$ 34,892
Broad Restructuring Plan
Restructuring Cost and Reserve [Line Items]
Restructuring and related cost, expected cost remaining	39,852		$ 4,581
Coatings Segment
Restructuring Cost and Reserve [Line Items]
Goodwill impairment	16,222
Coatings Segment | Broad Restructuring Plan
Restructuring Cost and Reserve [Line Items]
Restructuring and related cost, expected cost remaining	5,192
Engineered Support Structures
Restructuring Cost and Reserve [Line Items]
Goodwill impairment	18,670
Engineered Support Structures | Broad Restructuring Plan
Restructuring Cost and Reserve [Line Items]
Restructuring and related cost, expected cost remaining	16,348
Utility Support Structures Segment
Restructuring Cost and Reserve [Line Items]
Goodwill impairment	0	$ 19,000
Coatings
Restructuring Cost and Reserve [Line Items]
Goodwill impairment	0	$ 16,222
Coatings | Broad Restructuring Plan
Restructuring Cost and Reserve [Line Items]
Restructuring and related cost, expected cost remaining	6,580
Other
Restructuring Cost and Reserve [Line Items]
Goodwill impairment	0
Other | Broad Restructuring Plan
Restructuring Cost and Reserve [Line Items]
Restructuring and related cost, expected cost remaining	1,277
Other | Broad Restructuring Plan
Restructuring Cost and Reserve [Line Items]
Restructuring and related cost, expected cost remaining	10,455
Selling, General and Administrative Expenses | 2016 Plan [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring and related cost, expected cost remaining			7,825
Selling, General and Administrative Expenses | Broad Restructuring Plan
Restructuring Cost and Reserve [Line Items]
Restructuring and related cost, expected cost remaining	18,144
Selling, General and Administrative Expenses | Employee Severance [Member] | 2016 Plan [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring and related cost, expected cost remaining			585
Selling, General and Administrative Expenses | Employee Severance [Member] | Broad Restructuring Plan
Restructuring Cost and Reserve [Line Items]
Restructuring and related cost, expected cost remaining	6,719
Selling, General and Administrative Expenses | Other cash restructuring expenses | 2016 Plan [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring and related cost, expected cost remaining			2,195
Selling, General and Administrative Expenses | Other cash restructuring expenses | Broad Restructuring Plan
Restructuring Cost and Reserve [Line Items]
Restructuring and related cost, expected cost remaining	1,716
Selling, General and Administrative Expenses | Asset impairments/net loss on disposals | 2016 Plan [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring and related cost, expected cost remaining			2,780
Selling, General and Administrative Expenses | Asset impairments/net loss on disposals | Broad Restructuring Plan
Restructuring Cost and Reserve [Line Items]
Restructuring and related cost, expected cost remaining	9,709
Selling, General and Administrative Expenses | Coatings Segment | Broad Restructuring Plan
Restructuring Cost and Reserve [Line Items]
Restructuring and related cost, expected cost remaining	642
Selling, General and Administrative Expenses | Coatings Segment | Employee Severance [Member] | Broad Restructuring Plan
Restructuring Cost and Reserve [Line Items]
Restructuring and related cost, expected cost remaining	404
Selling, General and Administrative Expenses | Coatings Segment | Other cash restructuring expenses | Broad Restructuring Plan
Restructuring Cost and Reserve [Line Items]
Restructuring and related cost, expected cost remaining	238
Selling, General and Administrative Expenses | Coatings Segment | Asset impairments/net loss on disposals | Broad Restructuring Plan
Restructuring Cost and Reserve [Line Items]
Restructuring and related cost, expected cost remaining	0
Selling, General and Administrative Expenses | Engineered Support Structures | 2016 Plan [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring and related cost, expected cost remaining			7,286
Selling, General and Administrative Expenses | Engineered Support Structures | Broad Restructuring Plan
Restructuring Cost and Reserve [Line Items]
Restructuring and related cost, expected cost remaining	5,888		1,040
Selling, General and Administrative Expenses | Engineered Support Structures | Employee Severance [Member] | 2016 Plan [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring and related cost, expected cost remaining			349
Selling, General and Administrative Expenses | Engineered Support Structures | Employee Severance [Member] | Broad Restructuring Plan
Restructuring Cost and Reserve [Line Items]
Restructuring and related cost, expected cost remaining	3,665
Selling, General and Administrative Expenses | Engineered Support Structures | Other cash restructuring expenses | 2016 Plan [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring and related cost, expected cost remaining			1,961
Selling, General and Administrative Expenses | Engineered Support Structures | Other cash restructuring expenses | Broad Restructuring Plan
Restructuring Cost and Reserve [Line Items]
Restructuring and related cost, expected cost remaining	0
Selling, General and Administrative Expenses | Engineered Support Structures | Asset impairments/net loss on disposals | 2016 Plan [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring and related cost, expected cost remaining			2,310
Selling, General and Administrative Expenses | Engineered Support Structures | Asset impairments/net loss on disposals | Broad Restructuring Plan
Restructuring Cost and Reserve [Line Items]
Restructuring and related cost, expected cost remaining	2,223
Selling, General and Administrative Expenses | Coatings | 2016 Plan [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring and related cost, expected cost remaining			305
Selling, General and Administrative Expenses | Coatings | Broad Restructuring Plan
Restructuring Cost and Reserve [Line Items]
Restructuring and related cost, expected cost remaining	606		602
Selling, General and Administrative Expenses | Coatings | Employee Severance [Member] | 2016 Plan [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring and related cost, expected cost remaining			236
Selling, General and Administrative Expenses | Coatings | Employee Severance [Member] | Broad Restructuring Plan
Restructuring Cost and Reserve [Line Items]
Restructuring and related cost, expected cost remaining	270
Selling, General and Administrative Expenses | Coatings | Other cash restructuring expenses | 2016 Plan [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring and related cost, expected cost remaining			0
Selling, General and Administrative Expenses | Coatings | Other cash restructuring expenses | Broad Restructuring Plan
Restructuring Cost and Reserve [Line Items]
Restructuring and related cost, expected cost remaining	336
Selling, General and Administrative Expenses | Coatings | Asset impairments/net loss on disposals | 2016 Plan [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring and related cost, expected cost remaining			236
Selling, General and Administrative Expenses | Coatings | Asset impairments/net loss on disposals | Broad Restructuring Plan
Restructuring Cost and Reserve [Line Items]
Restructuring and related cost, expected cost remaining	0
Selling, General and Administrative Expenses | Other | Broad Restructuring Plan
Restructuring Cost and Reserve [Line Items]
Restructuring and related cost, expected cost remaining	553		468
Selling, General and Administrative Expenses | Other | Employee Severance [Member] | Broad Restructuring Plan
Restructuring Cost and Reserve [Line Items]
Restructuring and related cost, expected cost remaining	423
Selling, General and Administrative Expenses | Other | Other cash restructuring expenses | Broad Restructuring Plan
Restructuring Cost and Reserve [Line Items]
Restructuring and related cost, expected cost remaining	0
Selling, General and Administrative Expenses | Other | Asset impairments/net loss on disposals | Broad Restructuring Plan
Restructuring Cost and Reserve [Line Items]
Restructuring and related cost, expected cost remaining	130
Selling, General and Administrative Expenses | Other | Broad Restructuring Plan
Restructuring Cost and Reserve [Line Items]
Restructuring and related cost, expected cost remaining	10,455		1,943
Selling, General and Administrative Expenses | Other | Employee Severance [Member] | Broad Restructuring Plan
Restructuring Cost and Reserve [Line Items]
Restructuring and related cost, expected cost remaining	1,957
Selling, General and Administrative Expenses | Other | Other cash restructuring expenses | Broad Restructuring Plan
Restructuring Cost and Reserve [Line Items]
Restructuring and related cost, expected cost remaining	1,142
Selling, General and Administrative Expenses | Other | Asset impairments/net loss on disposals | Broad Restructuring Plan
Restructuring Cost and Reserve [Line Items]
Restructuring and related cost, expected cost remaining	7,356
Selling, General and Administrative Expenses | Corporate and Other [Member] | 2016 Plan [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring and related cost, expected cost remaining			234
Selling, General and Administrative Expenses | Corporate and Other [Member] | Employee Severance [Member] | 2016 Plan [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring and related cost, expected cost remaining			0
Selling, General and Administrative Expenses | Corporate and Other [Member] | Other cash restructuring expenses | 2016 Plan [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring and related cost, expected cost remaining			234
Selling, General and Administrative Expenses | Corporate and Other [Member] | Asset impairments/net loss on disposals | 2016 Plan [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring and related cost, expected cost remaining			234
Cost of Sales | 2016 Plan [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring and related cost, expected cost remaining			5,045
Cost of Sales | Broad Restructuring Plan
Restructuring Cost and Reserve [Line Items]
Restructuring and related cost, expected cost remaining	21,708
Cost of Sales | Employee Severance [Member] | 2016 Plan [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring and related cost, expected cost remaining			1,689
Cost of Sales | Employee Severance [Member] | Broad Restructuring Plan
Restructuring Cost and Reserve [Line Items]
Restructuring and related cost, expected cost remaining	7,204
Cost of Sales | Other cash restructuring expenses | 2016 Plan [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring and related cost, expected cost remaining			2,257
Cost of Sales | Other cash restructuring expenses | Broad Restructuring Plan
Restructuring Cost and Reserve [Line Items]
Restructuring and related cost, expected cost remaining	4,377
Cost of Sales | Asset impairments/net loss on disposals | 2016 Plan [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring and related cost, expected cost remaining			1,099
Cost of Sales | Asset impairments/net loss on disposals | Broad Restructuring Plan
Restructuring Cost and Reserve [Line Items]
Restructuring and related cost, expected cost remaining	10,127
Cost of Sales | Coatings Segment | Broad Restructuring Plan
Restructuring Cost and Reserve [Line Items]
Restructuring and related cost, expected cost remaining	4,550		528
Cost of Sales | Coatings Segment | Employee Severance [Member] | Broad Restructuring Plan
Restructuring Cost and Reserve [Line Items]
Restructuring and related cost, expected cost remaining	1,555
Cost of Sales | Coatings Segment | Other cash restructuring expenses | Broad Restructuring Plan
Restructuring Cost and Reserve [Line Items]
Restructuring and related cost, expected cost remaining	1,853
Cost of Sales | Coatings Segment | Asset impairments/net loss on disposals | Broad Restructuring Plan
Restructuring Cost and Reserve [Line Items]
Restructuring and related cost, expected cost remaining	1,142
Cost of Sales | Engineered Support Structures | 2016 Plan [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring and related cost, expected cost remaining			4,976
Cost of Sales | Engineered Support Structures | Broad Restructuring Plan
Restructuring Cost and Reserve [Line Items]
Restructuring and related cost, expected cost remaining	10,460
Cost of Sales | Engineered Support Structures | Employee Severance [Member] | 2016 Plan [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring and related cost, expected cost remaining			1,620
Cost of Sales | Engineered Support Structures | Employee Severance [Member] | Broad Restructuring Plan
Restructuring Cost and Reserve [Line Items]
Restructuring and related cost, expected cost remaining	4,417
Cost of Sales | Engineered Support Structures | Other cash restructuring expenses | 2016 Plan [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring and related cost, expected cost remaining			2,257
Cost of Sales | Engineered Support Structures | Other cash restructuring expenses | Broad Restructuring Plan
Restructuring Cost and Reserve [Line Items]
Restructuring and related cost, expected cost remaining	2,349
Cost of Sales | Engineered Support Structures | Asset impairments/net loss on disposals | 2016 Plan [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring and related cost, expected cost remaining			1,099
Cost of Sales | Engineered Support Structures | Asset impairments/net loss on disposals | Broad Restructuring Plan
Restructuring Cost and Reserve [Line Items]
Restructuring and related cost, expected cost remaining	3,694
Cost of Sales | Coatings | 2016 Plan [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring and related cost, expected cost remaining			69
Cost of Sales | Coatings | Broad Restructuring Plan
Restructuring Cost and Reserve [Line Items]
Restructuring and related cost, expected cost remaining	5,974
Cost of Sales | Coatings | Employee Severance [Member] | 2016 Plan [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring and related cost, expected cost remaining			69
Cost of Sales | Coatings | Employee Severance [Member] | Broad Restructuring Plan
Restructuring Cost and Reserve [Line Items]
Restructuring and related cost, expected cost remaining	508
Cost of Sales | Coatings | Other cash restructuring expenses | 2016 Plan [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring and related cost, expected cost remaining			0
Cost of Sales | Coatings | Other cash restructuring expenses | Broad Restructuring Plan
Restructuring Cost and Reserve [Line Items]
Restructuring and related cost, expected cost remaining	175
Cost of Sales | Coatings | Asset impairments/net loss on disposals | 2016 Plan [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring and related cost, expected cost remaining			0
Cost of Sales | Coatings | Asset impairments/net loss on disposals | Broad Restructuring Plan
Restructuring Cost and Reserve [Line Items]
Restructuring and related cost, expected cost remaining	5,291
Cost of Sales | Other | Broad Restructuring Plan
Restructuring Cost and Reserve [Line Items]
Restructuring and related cost, expected cost remaining	724
Cost of Sales | Other | Employee Severance [Member] | Broad Restructuring Plan
Restructuring Cost and Reserve [Line Items]
Restructuring and related cost, expected cost remaining	724
Cost of Sales | Other | Other cash restructuring expenses | Broad Restructuring Plan
Restructuring Cost and Reserve [Line Items]
Restructuring and related cost, expected cost remaining	0
Cost of Sales | Other | Asset impairments/net loss on disposals | Broad Restructuring Plan
Restructuring Cost and Reserve [Line Items]
Restructuring and related cost, expected cost remaining	0
Cost of Sales | Other | Broad Restructuring Plan
Restructuring Cost and Reserve [Line Items]
Restructuring and related cost, expected cost remaining	0
Cost of Sales | Other | Employee Severance [Member] | Broad Restructuring Plan
Restructuring Cost and Reserve [Line Items]
Restructuring and related cost, expected cost remaining	0
Cost of Sales | Other | Other cash restructuring expenses | Broad Restructuring Plan
Restructuring Cost and Reserve [Line Items]
Restructuring and related cost, expected cost remaining	0
Cost of Sales | Other | Asset impairments/net loss on disposals | Broad Restructuring Plan
Restructuring Cost and Reserve [Line Items]
Restructuring and related cost, expected cost remaining	$ 0
Cost of Sales | Corporate and Other [Member] | 2016 Plan [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring and related cost, expected cost remaining			0
Cost of Sales | Corporate and Other [Member] | Employee Severance [Member] | 2016 Plan [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring and related cost, expected cost remaining			0
Cost of Sales | Corporate and Other [Member] | Other cash restructuring expenses | 2016 Plan [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring and related cost, expected cost remaining			0
Cost of Sales | Corporate and Other [Member] | Asset impairments/net loss on disposals | 2016 Plan [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring and related cost, expected cost remaining			$ 0