BUSINESS SEGMENTS (Tables)

9 Months Ended

Sep. 28, 2019

Segment Reporting [Abstract]

Segment reporting information of sales and operating income

Summary by Business

	Thirteen weeks ended						Thirty-nine weeks ended
	September 28, 2019			September 29, 2018			September 28, 2019			September 29, 2018
SALES:
Engineered Support Structures segment:
Lighting, Traffic, and Highway Safety Products	$	191,262		$	183,184		$	530,021		$	522,558
Communication Products	48,391			35,985			138,710			109,690
Access Systems	28,405			32,355			88,363			94,941
Engineered Support Structures segment	268,058			251,524			757,094			727,189
Utility Support Structures segment:
Steel	153,433			161,847			460,309			471,947
Concrete	28,011			27,715			88,415			81,562
Engineered Solar Tracker Solutions	3,418			6,090			43,642			6,090
Offshore and Other Complex Steel Structures	20,096			22,617			66,343			66,251
Utility Support Structures segment	204,958			218,269			658,709			625,850
Coatings segment	92,957			90,433			278,142			266,952
Irrigation segment:
North America	82,840			78,168			294,127			301,887
International	61,340			62,007			158,054			189,177
Irrigation segment	144,180			140,175			452,181			491,064
Other	—			—			—			23,080
Total	710,153			700,401			2,146,126			2,134,135
INTERSEGMENT SALES:
Engineered Support Structures segment	1,564			3,093			5,066			16,801
Utility Support Structures segment	762			326			2,246			1,517
Coatings segment	16,035			15,886			49,900			49,408
Irrigation segment	1,452			2,404			5,564			6,628
Total	19,813			21,709			62,776			74,354
NET SALES:
Engineered Support Structures segment	266,494			248,431			752,028			710,388
Utility Support Structures segment	204,196			217,943			656,463			624,333
Coatings segment	76,922			74,547			228,242			217,544
Irrigation segment	142,728			137,771			446,617			484,436
Other	—			—			—			23,080
Total	$	690,340		$	678,692		$	2,083,350		$	2,059,781
OPERATING INCOME:
Engineered Support Structures segment	$	21,825		$	16,499		$	55,152		$	36,411
Utility Support Structures segment	20,362			2,090			61,443			46,298
Coatings segment	13,865			14,373			39,037			41,108
Irrigation segment	18,204			21,302			59,868			82,917
Other	—			—			—			(913		)
Adjustment to LIFO inventory valuation method	2,799			(2,780		)	5,539			(5,512		)
Corporate	(13,192		)	(13,124		)	(38,360		)	(34,319		)
Total	$	63,863		$	38,360		$	182,679		$	165,990