Note 8 - Segment Reporting (Tables)

6 Months Ended

Jun. 30, 2013

Segment Reporting Disclosure [Text Block]

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

	Quarters Ended June 30,					Six Months Ended June 30,
	2013		2012			2013			2012
Revenues:
Energy and Mining	$	108,592	$	127,900		$	217,283		$	240,224
North American Water and Wastewater		87,979		79,492			165,620			153,829
International Water and Wastewater		27,757		26,276			53,911			52,946
Commercial and Structural		17,772		20,822			31,262			35,369
Total revenues	$	242,100	$	254,490		$	468,076		$	482,368
Gross profit:
Energy and Mining	$	26,294	$	32,969		$	50,560		$	59,757
North American Water and Wastewater		19,979		17,097			34,429			31,667
International Water and Wastewater		5,597		3,107			10,308			6,712
Commercial and Structural		6,698		9,046			11,408			16,654
Total gross profit	$	58,568	$	62,219		$	106,705		$	114,790
Operating income (loss):
Energy and Mining	$	6,156	$	13,748		$	11,607		$	21,476
North American Water and Wastewater		8,958		5,883			12,683			10,073
International Water and Wastewater		82		(2,270	)		(1,081	)		(4,348	)
Commercial and Structural		627		1,293			(568	)		2,640
Total operating income:	$	15,823	$	18,654		$	22,641		$	29,841

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

	Quarters Ended June 30,					Six Months Ended June 30,
	2013		2012			2013		2012
Revenues:
United States	$	155,444	$	172,496		$	294,191	$	314,104
Canada		35,752		39,369			75,146		83,758
Europe		22,337		21,001			44,987		40,943
Other foreign		28,567		21,624			53,752		43,563
Total revenues	$	242,100	$	254,490		$	468,076	$	482,368
Gross Profit:
United States	$	38,055	$	46,834		$	67,168	$	82,688
Canada		8,100		9,344			17,402		20,643
Europe		5,680		5,332			10,684		9,775
Other foreign		6,733		709			11,451		1,684
Total revenues	$	58,568	$	62,219		$	106,705	$	114,790
Operating income (loss)
United States	$	7,231	$	13,310		$	7,126	$	19,239
Canada		4,477		5,223			10,225		11,859
Europe		1,955		1,745			2,823		2,097
Other foreign		2,160		(1,624	)		2,467		(3,354	)
Total operating income	$	15,823	$	18,654		$	22,641	$	29,841