Business Segment Information

6 Months Ended

Jun. 30, 2011

Business Segment Information

Business Segment Information

Note 4:        BUSINESS SEGMENT INFORMATION

As previously mentioned, we operate in five segments. Our segments are fairly diverse with respect to the products and services they offer as well as the customers they serve. Accordingly, we organize our segments based on the products provided and industries they serve. We measure segment performance based on operating profit, which is defined as net sales less cost of sales and general, selling and administrative expenses related to a segment's operations. The costs deducted to arrive at operating profit do not include several items, such as net interest expense or income taxes. Segment assets are those assets used in the operations of that segment. Corporate assets include cash and cash equivalents, corporate leasehold improvements, assets associated with certain employee benefit plans, and other miscellaneous equipment.

The following summaries set forth certain financial information by segment:

	Six Months Ended June 30,				Three Months Ended June  30,
	2011		2010		2011		2010
Net sales:
Minerals and materials	$	236,731	$	204,085	$	119,851	$	106,397
Environmental		136,553		103,334		81,220		65,159
Oilfield services		89,581		69,848		44,837		39,644
Transportation		27,454		25,703		14,780		13,583
Intersegment sales		(17,071)		(7,306)		(9,855)		(4,070)
Total	$	473,248	$	395,664	$	250,833	$	220,713
Operating profit (loss):
Minerals and materials	$	30,870	$	30,632	$	14,699	$	16,326
Environmental		10,502		7,797		8,219		8,014
Oilfield services		8,295		5,781		3,423		4,553
Transportation		1,150		1,210		685		699
Corporate		(10,117)		(10,916)		(4,896)		(5,848)
Total	$	40,700	$	34,504	$	22,130	$	23,744
	As of Jun. 30, 2011		As of Dec. 31, 2010
Assets:
Minerals and materials	$	403,874	$	402,640
Environmental		180,812		160,053
Oilfield services		185,191		173,239
Transportation		4,852		4,071
Corporate		63,912		59,090
Total	$	838,641	$	799,093

	Six Months Ended June 30,				Three Months Ended June 30,
	2011		2010		2011		2010
Depreciation, depletion and amortization:
Minerals and materials	$	9,819	$	7,772	$	5,276	$	3,976
Environmental		2,615		2,579		1,330		1,195
Oilfield services		6,122		5,779		3,120		2,855
Transportation		34		20		19		12
Corporate		1,141		872		580		432
Total	$	19,731	$	17,022	$	10,325	$	8,470
Capital expenditures:
Minerals and materials	$	9,055	$	19,070	$	6,271	$	6,069
Environmental		1,868		955		1,153		502
Oilfield services		12,898		4,906		6,466		2,404
Transportation		154		38		154		1
Corporate		825		970		338		886
Total	$	24,800	$	25,939	$	14,382	$	9,862
Research and development (income) expense:
Minerals and materials	$	3,140	$	2,759	$	1,528	$	1,436
Environmental		1,050		1,274		562		628
Oilfield services		204		322		145		163
Corporate		(153)		40		33		(41)
Total	$	4,241	$	4,395	$	2,268	$	2,186