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BUSINESS SEGMENTS (Details) $ in Thousands | 3 Months Ended | 9 Months Ended
--- | --- | ---
Sep. 26, 2020 USD ($) | Sep. 28, 2019 USD ($) | Sep. 26, 2020 USD ($) segment | Sep. 28, 2019 USD ($)
Business Segments |  |  |  |
Number of reportable segments | segment |  |  | 4 |
Net sales | $ 733,970 | $ 690,340 | $ 2,096,978 | $ 2,083,350
Operating income | 61,479 | 61,064 | 171,814 | 177,140
Engineered Support Structures Segment |  |  |  |
Business Segments |  |  |  |
Net sales | 254,945 | 266,494 | 731,184 | 752,028
Operating income | 25,434 | 21,825 | 46,183 | 55,152
Utility Support Structures Segment |  |  |  |
Business Segments |  |  |  |
Net sales | 272,479 | 204,196 | 723,900 | 656,463
Operating income | 25,881 | 20,362 | 75,255 | 61,443
Coatings Segment |  |  |  |
Business Segments |  |  |  |
Net sales | 68,698 | 76,922 | 199,955 | 228,242
Operating income | 12,416 | 13,865 | 33,618 | 39,037
Irrigation Segment |  |  |  |
Business Segments |  |  |  |
Net sales | 137,848 | 142,728 | 441,939 | 446,617
Operating income | 14,687 | 18,204 | 60,701 | 59,868
Sales |  |  |  |
Business Segments |  |  |  |
Sales | 757,144 | 710,153 | 2,173,505 | 2,146,126
Sales | Engineered Support Structures Segment |  |  |  |
Business Segments |  |  |  |
Sales | 255,656 | 268,058 | 739,783 | 757,094
Sales | Engineered Support Structures Segment | Lighting, Traffic, and Highway Safety Products |  |  |  |
Business Segments |  |  |  |
Sales | 181,571 | 191,262 | 534,585 | 530,021
Sales | Engineered Support Structures Segment | Communication Products |  |  |  |
Business Segments |  |  |  |
Sales | 50,677 | 48,391 | 139,759 | 138,710
Sales | Engineered Support Structures Segment | Access Systems |  |  |  |
Business Segments |  |  |  |
Sales | 23,408 | 28,405 | 65,439 | 88,363
Sales | Utility Support Structures Segment |  |  |  |
Business Segments |  |  |  |
Sales | 274,393 | 204,958 | 731,178 | 658,709
Sales | Utility Support Structures Segment | Steel |  |  |  |
Business Segments |  |  |  |
Sales | 156,082 | 153,433 | 482,430 | 460,309
Sales | Utility Support Structures Segment | Concrete |  |  |  |
Business Segments |  |  |  |
Sales | 39,215 | 28,011 | 120,653 | 88,415
Sales | Utility Support Structures Segment | Engineered Solar Tracker Solutions |  |  |  |
Business Segments |  |  |  |
Sales | 43,287 | 3,418 | 56,830 | 43,642
Sales | Utility Support Structures Segment | Offshore and Other Complex Steel Structures |  |  |  |
Business Segments |  |  |  |
Sales | 35,809 | 20,096 | 71,265 | 66,343
Sales | Coatings Segment |  |  |  |
Business Segments |  |  |  |
Sales | 87,886 | 92,957 | 255,976 | 278,142
Sales | Irrigation Segment |  |  |  |
Business Segments |  |  |  |
Sales | 139,209 | 144,180 | 446,568 | 452,181
Intersegment sales |  |  |  |
Business Segments |  |  |  |
Sales | 23,174 | 19,813 | 76,527 | 62,776
Intersegment sales | Engineered Support Structures Segment |  |  |  |
Business Segments |  |  |  |
Sales | 711 | 1,564 | 8,599 | 5,066
Intersegment sales | Utility Support Structures Segment |  |  |  |
Business Segments |  |  |  |
Sales | 1,914 | 762 | 7,278 | 2,246
Intersegment sales | Coatings Segment |  |  |  |
Business Segments |  |  |  |
Sales | 19,188 | 16,035 | 56,021 | 49,900
Intersegment sales | Irrigation Segment |  |  |  |
Business Segments |  |  |  |
Sales | 1,361 | 1,452 | 4,629 | 5,564
Other |  |  |  |
Business Segments |  |  |  |
Operating income | (16,939) | (13,192) | (43,943) | (38,360)
North America | Sales | Irrigation Segment |  |  |  |
Business Segments |  |  |  |
Sales | 75,803 | 82,840 | 281,397 | 294,127
International | Sales | Irrigation Segment |  |  |  |
Business Segments |  |  |  |
Sales | $ 63,406 | $ 61,340 | $ 165,171 | $ 158,054

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