Segment Information (Tables)

3 Months Ended

Mar. 31, 2016

Segment Information [Abstract]

Segment information

The accounting policies of the reportable segments are the same as those described in the summary of significant accounting policies. Intersegment sales and transfers are valued at prices comparable to those for unrelated parties.

Segment Information:

	Three Months Ended March 31, 2016
	Infrastructure Group			Aggregateand Mining Group			Energy Group			Corporate			Total
Net sales to external   customers	$	153,114		$	92,488		$	33,119		$	-		$	278,721
Intersegment sales		3,173			4,851			3,466			-			11,490
Gross profit (loss)		39,837			25,148			7,082			(111	)		71,956
Gross profit percent		26.0	%		27.2	%		21.4	%		-			25.8	%
Segment profit (loss)	$	21,863		$	9,538		$	(192	)	$	(14,226	)	$	16,983

	Three Months Ended March 31, 2015
	Infrastructure Group			Aggregateand Mining Group			Energy Group			Corporate			Total
Net sales to external   customers	$	135,045		$	106,412		$	47,291		$	-		$	288,748
Intersegment sales		5,104			10,684			7,477			-			23,265
Gross profit		30,946			25,972			9,119			8			66,045
Gross profit percent		22.9	%		24.4	%		19.3	%		-			22.9	%
Segment profit (loss)	$	15,511		$	11,594		$	163		$	(11,965	)	$	15,303

Schedule of segment profits to the Company's consolidated totals

A reconciliation of total segment profits to the Company’s consolidated totals is as follows:

	Three Months Ended March 31,
	2016			2015
Total segment profits	$	16,983		$	15,303
Recapture (elimination) of intersegment profit		695			(386	)
Net income		17,678			14,917
Net loss attributable to non-controlling   interest in subsidiaries		(65	)		(188	)
Net income attributable to controlling interest	$	17,743		$	15,105