Note 9 - Segment Reporting (Tables)

3 Months Ended

Mar. 31, 2012

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

	Quarters Ended, March 31,
	2012			2011
Revenues:
Energy and Mining	$	115,038		$	95,457
North American Water and Wastewater		74,338			81,861
European Water and Wastewater		16,077			20,760
Asia-Pacific Water and Wastewater		10,594			12,509
Commercial and Structural		14,547			—
Total revenues	$	230,594		$	210,587
Gross profit:
Energy and Mining	$	26,899		$	23,091
North American Water and Wastewater		14,571			11,143
European Water and Wastewater		3,352			4,523
Asia-Pacific Water and Wastewater		254			2,417
Commercial and Structural		7,608			—
Total gross profit	$	52,684		$	41,174
Operating income (loss):
Energy and Mining	$	7,440		$	6,390
North American Water and Wastewater		4,190			(1,675	)
European Water and Wastewater		(286	)		601
Asia-Pacific Water and Wastewater		(1,792	)		173
Commercial and Structural		1,347			—
Total operating income	$	10,899		$	5,489

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

	Quarters Ended, March 31,
	2012			2011
Revenues:
United States	$	144,322		$	113,682
Canada		44,390			44,981
Europe		19,943			24,348
Other foreign		21,939			27,576
Total revenues	$	230,594		$	210,587
Gross profit:
United States	$	35,967		$	18,832
Canada		11,299			11,809
Europe		4,443			5,428
Other foreign		975			5,105
Total gross profit	$	52,684		$	41,174
Operating income (loss):
United States	$	5,641		$	(6,168	)
Canada		6,636			7,749
Europe		352			1,303
Other foreign		(1,730	)		2,605
Total operating income	$	10,899		$	5,489