Note 8 - Segment Reporting (Tables)

3 Months Ended

Mar. 31, 2014

Segment Reporting [Abstract]

Schedule of Segment Reporting Information, by Segment

Financial information by segment was as follows (in thousands):

	Quarters Ended March 31,
	2014			2013
Revenues:
Energy and Mining	$	183,910		$	108,690
Water and Wastewater	106,133			103,796
Commercial and Structural	16,191			13,490
Total revenues	$	306,234		$	225,976
Gross profit:
Energy and Mining	$	35,509		$	24,266
Water and Wastewater	20,102			19,161
Commercial and Structural	5,452			4,710
Total gross profit	$	61,063		$	48,137
Operating income (loss):
Energy and Mining	$	7,676		$	5,451
Water and Wastewater	3,019			2,562
Commercial and Structural	(1,561		)	(1,195		)
Total operating income	$	9,134		$	6,818

Schedule of Revenue from External Customers Attributed to Foreign Countries by Geographic Area

The following table summarizes revenues, gross profit and operating income (loss) by geographic region (in thousands):

	Quarters Ended March 31,
	2014		2013
Revenues:
United States	$	210,630	$	138,747
Canada	41,864		39,394
Europe	22,616		22,651
Other foreign	31,124		25,184
Total revenues	$	306,234	$	225,976
Gross profit:
United States	$	41,393	$	29,112
Canada	9,062		9,303
Europe	4,758		5,003
Other foreign	5,850		4,719
Total gross profit	$	61,063	$	48,137
Operating income (loss):
United States	$	2,396	$	(106	)
Canada	5,423		5,748
Europe	527		868
Other foreign	788		308
Total operating income	$	9,134	$	6,818