Note 9 - Segment Reporting (Tables)

3 Months Ended

Mar. 31, 2013

Schedule of Segment Reporting Information, by Segment [Table Text Block]

	Quarters Ended March 31,
	2013			2012
Revenues:
Energy and Mining	$	114,366		$	115,038
North American Water and Wastewater		77,641			74,338
International Water and Wastewater		26,155			26,671
Commercial and Structural		13,490			14,547
Total revenues	$	231,652		$	230,594
Gross profit:
Energy and Mining	$	23,188		$	26,899
North American Water and Wastewater		14,450			14,571
International Water and Wastewater		4,711			3,606
Commercial and Structural		4,710			7,608
Total gross profit	$	47,059		$	52,684
Operating income (loss):
Energy and Mining	$	3,914		$	7,440
North American Water and Wastewater		3,725			4,190
International Water and Wastewater		(1,163	)		(2,078	)
Commercial and Structural		(1,195	)		1,347
Total operating income:	$	5,281		$	10,899

Schedule of Revenue from External Customers Attributed to Foreign Countries by Geographic Area [Table Text Block]

	Quarters Ended March 31,
	2013			2012
Revenues:
United States	$	144,423		$	144,322
Canada		39,394			44,390
Europe		22,651			19,943
Other foreign		25,184			21,939
Total revenues	$	231,652		$	230,594
Gross Profit:
United States	$	28,034		$	35,967
Canada		9,303			11,299
Europe		5,003			4,443
Other foreign		4,719			975
Total revenues	$	47,059		$	52,684
Operating income (loss)
United States	$	(1,643	)	$	5,641
Canada		5,748			6,636
Europe		868			352
Other foreign		308			(1,730	)
Total operating income	$	5,281		$	10,899