QUARTERLY DATA (UNAUDITED)



	First Quarter		Second Quarter		Third Quarter		Fourth Quarter
	(in thousands except per share amounts)
2011
Revenues	$	434,962	$	447,235	$	556,053	$	545,886
Cost of revenues (1)	312,577		307,754		386,518		373,142
Gross profit	122,385		139,481		169,535		172,744
Income from operations	39,742		51,884		66,792		59,247
Other income	2,899		2,868		164		471
Net income	22,730		29,156		37,133		38,233
Basic income per share	0.43		0.55		0.70		0.72
Diluted income per share	0.43		0.55		0.70		0.72



	First Quarter		Second Quarter		Third Quarter			Fourth Quarter
	(in thousands except per share amounts)
2010
Revenues	$	354,896	$	471,639	$	487,651		$	417,058
Cost of revenues (1)	260,417		324,280		335,273			290,770
Gross profit	94,479		147,359		152,378			126,288
Income from operations	23,619		71,923		73,372			42,998
Other income (expense)	446		2,708		(669		)	310
Income from discontinued operations, net of tax	382		2,412		—			—
Net income	10,430		57,929		38,827			23,329
Basic income per share	0.20		1.10		0.74			0.44
Diluted income per share	0.20		1.10		0.73			0.44

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(1)	Items shown separately on the statements of income consist of (i) accretion of environmental liabilities and (ii) depreciation and amortization.

Earnings per share are computed independently for each of the quarters presented. Accordingly, the 2011 and 2010 quarterly basic and diluted earnings per share do not equal the total computed for the year.