BUSINESS SEGMENTS (Tables)

6 Months Ended

Jun. 30, 2018

Segment Reporting [Abstract]

Segment reporting information of sales and operating income

(9) BUSINESS SEGMENTS (Continued)

Summary by Business

	Thirteen Weeks Ended						Twenty-six Weeks Ended
	June 30, 2018			July 1, 2017			June 30, 2018			July 1, 2017
SALES:
Engineered Support Structures segment:
Lighting, Traffic, and Highway Safety Products	$	178,930		$	161,474		$	339,374		$	302,276
Communication Products	39,592			43,813			73,705			75,289
Access Systems	32,189			31,516			62,586			64,187
Engineered Support Structures segment	250,711			236,803			475,665			441,752
Utility Support Structures segment:
Steel	146,117			163,079			310,100			311,433
Concrete	30,185			22,906			53,847			49,110
Offshore and Other Complex Steel Structures	21,417			24,619			43,634			50,326
Utility Support Structures segment	197,719			210,604			407,581			410,869
Coatings segment	91,572			79,781			176,519			153,249
Irrigation segment	162,936			188,287			350,889			355,511
Other	4,681			21,072			23,080			40,666
Total	707,619			736,547			1,433,734			1,402,047
INTERSEGMENT SALES:
Engineered Support Structures segment	4,670			5,525			13,708			17,398
Utility Support Structures segment	1,188			982			1,191			1,217
Coatings segment	17,033			15,181			33,522			29,317
Irrigation segment	2,323			2,122			4,224			3,905
Other	—			—			—			—
Total	25,214			23,810			52,645			51,837
NET SALES:
Engineered Support Structures segment	246,041			231,278			461,957			424,354
Utility Support Structures segment	196,531			209,622			406,390			409,652
Coatings segment	74,539			64,600			142,997			123,932
Irrigation segment	160,613			186,165			346,665			351,606
Other	4,681			21,072			23,080			40,666
Total	$	682,405		$	712,737		$	1,381,089		$	1,350,210
OPERATING INCOME:
Engineered Support Structures segment	$	12,965		$	20,288		$	19,912		$	29,752
Utility Support Structures segment	20,841			22,394			44,208			46,601
Coatings segment	14,868			12,108			26,735			21,514
Irrigation segment	27,728			34,670			61,615			64,961
Other	(334		)	1,859			(913		)	3,945
Adjustment to LIFO inventory valuation method	(1,651		)	(434		)	(2,732		)	(1,213		)
Corporate	(10,747		)	(12,435		)	(21,195		)	(22,454		)
Total	$	63,670		$	78,450		$	127,630		$	143,106