Note 9 - Segment Data (Tables)

6 Months Ended

Jun. 30, 2012

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

	Second Quarter						First Half
(In thousands)	2012			2011			2012			2011
Revenues
Fluids Systems & Engineering	$	202,388		$	191,205		$	420,884		$	361,672
Mats & Integrated Services		30,071			27,793			60,604			50,856
Environmental Services		13,297			11,824			26,604			20,945
Total Revenues	$	245,756		$	230,822		$	508,092		$	433,473
Operating Income (loss)
Fluids Systems & Engineering	$	13,480		$	20,792		$	27,475		$	39,991
Mats & Integrated Services		13,075			14,730			27,414			26,514
Environmental Services		3,514			2,980			7,089			4,600
Corporate Office		(5,314	)		(6,906	)		(11,088	)		(11,561	)
Operating Income	$	24,755		$	31,596		$	50,890		$	59,544