BUSINESS SEGMENTS (Tables)

6 Months Ended

Jul. 01, 2017

Segment Reporting [Abstract]

Segment reporting information of sales and operating income

(7) BUSINESS SEGMENTS (Continued)

Summary by Business

	Thirteen Weeks Ended						Twenty-six Weeks Ended
	July 1, 2017			June 25, 2016			July 1, 2017			June 25, 2016
SALES:
Engineered Support Structures segment:
Lighting, Traffic, and Roadway Products	$	173,768		$	163,191		$	322,850		$	309,493
Communication Products	43,813			40,725			75,289			71,394
Engineered Support Structures segment	217,581			203,916			398,139			380,887
Energy and Mining segment:
Offshore and Other Complex Steel Structures	24,619			25,908			50,326			48,877
Grinding Media	21,072			21,018			40,666			40,508
Access Systems	31,516			33,766			64,187			63,756
Energy and Mining segment	77,207			80,692			155,179			153,141
Utility Support Structures segment:
Steel	161,716			126,101			310,124			248,072
Concrete	22,906			25,144			49,110			47,693
Utility Support Structures segment	184,622			151,245			359,234			295,765
Coatings segment	79,781			75,298			153,249			143,879
Irrigation segment	188,287			152,252			355,511			310,766
Total	747,478			663,403			1,421,312			1,284,438
INTERSEGMENT SALES:
Engineered Support Structures segment	16,456			8,114			36,663			19,126
Energy & Mining segment	—			1,409			—			3,067
Utility Support Structures segment	982			86			1,217			262
Coatings segment	15,181			11,886			29,317			21,699
Irrigation segment	2,122			1,659			3,905			3,430
Total	34,741			23,154			71,102			47,584
NET SALES:
Engineered Support Structures segment	201,125			195,802			361,476			361,761
Energy & Mining segment	77,207			79,283			155,179			150,074
Utility Support Structures segment	183,640			151,159			358,017			295,503
Coatings segment	64,600			63,412			123,932			122,180
Irrigation segment	186,165			150,593			351,606			307,336
Total	$	712,737		$	640,249		$	1,350,210		$	1,236,854
OPERATING INCOME:
Engineered Support Structures segment	$	20,244		$	20,817		$	29,457		$	33,292
Energy & Mining segment	3,941			3,341			7,778			5,243
Utility Support Structures segment	20,189			17,582			42,897			32,006
Coatings segment	12,108			14,023			21,514			25,436
Irrigation segment	34,670			31,013			64,961			59,908
Adjustment to LIFO inventory valuation method	(434		)	(3,153		)	(1,213		)	(1,126		)
Corporate	(12,428		)	(11,817		)	(22,602		)	(20,588		)
Total	$	78,290		$	71,806		$	142,792		$	134,171