Business Segment Information (Tables)

6 Months Ended

Jun. 30, 2012

Business Segment Information [Abstract]

Segment disclosure

	Six Months Ended June 30,						Three Months Ended June  30,
	2012			2011			2012			2011
Net sales:
Minerals and materials	$	256.3		$	234.1		$	131.1		$	118.3
Environmental		112.4			126.5			61.3			74.8
Oilfield services		116.4			90.7			61.1			45.1
Transportation		22.8			27.5			11.7			14.8
Intersegment sales		(14.9	)		(17.1	)		(7.8	)		(9.9	)
Total	$	493.0		$	461.7		$	257.4		$	243.1
Operating profit (loss):
Minerals and materials	$	44.0		$	29.5		$	22.5		$	13.5
Environmental		7.0			10.1			6.2			8.0
Oilfield services		12.5			9.5			7.7			3.7
Transportation		0.5			1.2			0.3			0.7
Corporate		(11.7	)		(10.0	)		(5.7	)		(4.9	)
Total	$	52.3		$	40.3		$	31.0		$	21.0
	As of June 30, 2012			As of Dec. 31, 2011
Assets:
Minerals and materials	$	436.9		$	431.1
Environmental		169.4			160.0
Oilfield services		197.7			194.7
Transportation		3.8			3.9
Corporate		61.2			60.9
Total	$	869.0		$	850.6

	Six Months Ended June 30,						Three Months Ended June 30,
	2012			2011			2012			2011
Depreciation, depletion and amortization:
Minerals and materials	$	9.5		$	10.0		$	4.9		$	5.4
Environmental		2.7			2.6			1.3			1.3
Oilfield services		8.2			6.1			4.2			3.1
Transportation		-			-			-			-
Corporate		1.4			1.2			0.7			0.6
Total	$	21.8		$	19.9		$	11.1		$	10.4
Capital expenditures:
Minerals and materials	$	10.8		$	9.1		$	4.3		$	6.3
Environmental		6.3			1.8			3.7			1.1
Oilfield services		13.0			12.9			7.0			6.5
Transportation		-			0.2			-			0.2
Corporate		2.1			0.8			0.6			0.3
Total	$	32.2		$	24.8		$	15.6		$	14.4
Research and development (income) expense:
Minerals and materials	$	3.6		$	3.1		$	1.9		$	1.5
Environmental		1.2			1.1			0.6			0.6
Oilfield services		0.4			0.2			0.3			0.2
Corporate		(0.1	)		(0.2	)		(0.2	)		-
Total	$	5.1		$	4.2		$	2.6		$	2.3