BUSINESS SEGMENTS (Tables)

3 Months Ended

Mar. 31, 2018

Segment Reporting [Abstract]

Segment reporting information of sales and operating income

(8) BUSINESS SEGMENTS (Continued)

Summary by Business

	Thirteen Weeks Ended
	March 31, 2018			April 1, 2017
SALES:
Engineered Support Structures segment:
Lighting, Traffic, and Highway Safety Products	$	160,444		$	140,802
Communication Products	34,113			31,476
Access Systems	30,397			32,671
Engineered Support Structures segment	224,954			204,949
Utility Support Structures segment:
Steel	163,983			148,354
Concrete	23,662			26,204
Offshore and Other Complex Steel Structures	22,217			25,707
Utility Support Structures segment	209,862			200,265
Coatings segment	84,947			73,468
Irrigation segment	187,953			167,224
Other	18,399			19,594
Total	726,115			665,500
INTERSEGMENT SALES:
Engineered Support Structures segment	9,038			11,873
Utility Support Structures segment	3			235
Coatings segment	16,489			14,136
Irrigation segment	1,901			1,783
Other	—			—
Total	27,431			28,027
NET SALES:
Engineered Support Structures segment	215,916			193,076
Utility Support Structures segment	209,859			200,030
Coatings segment	68,458			59,332
Irrigation segment	186,052			165,441
Other	18,399			19,594
Total	$	698,684		$	637,473
OPERATING INCOME:
Engineered Support Structures segment	$	6,947		$	9,464
Utility Support Structures segment	23,367			24,207
Coatings segment	11,867			9,406
Irrigation segment	33,887			30,291
Other	(579		)	2,086
Adjustment to LIFO inventory valuation method	(1,081		)	(779		)
Corporate	(10,448		)	(10,019		)
Total	$	63,960		$	64,656