CONSOLIDATED STATEMENTS OF OPERATIONS (USD $) In Thousands, except Per Share data	3 Months Ended				9 Months Ended
	Sep. 30, 2011		Sep. 30, 2010		Sep. 30, 2011		Sep. 30, 2010
Operating revenues:
Oil and natural gas	$ 11,837		$ 6,800		$ 35,678		$ 21,564
Total operating revenues	673,828		378,663		1,841,296		957,253
Operating costs and expenses:
Contract drilling	264,418		174,999		701,871		459,448
Pressure pumping	149,577		51,305		397,018		132,401
Oil and natural gas	2,306		1,484		6,406		5,326
Depreciation, depletion, amortization and impairment	110,713		85,431		309,677		239,930
Selling, general and administrative	15,957		13,685		48,681		37,491
Net (gain) loss on asset disposals	(1,437)	[1]	(250)	[1]	(4,058)	[1]	(21,940)	[1]
Provision for bad debts			(500)				(1,500)
Total operating costs and expenses	541,534		326,154		1,459,595		851,156
Operating income	132,294		52,509		381,701		106,097
Other income (expense):
Interest income	47		64		135		1,631
Interest expense	(3,835)		(6,227)		(11,238)		(9,011)
Other	375		260		572		509
Total other expense	(3,413)		(5,903)		(10,531)		(6,871)
Income from continuing operations before income taxes	128,881		46,606		371,170		99,226
Income tax expense (benefit):
Current	6,795		(1,748)		25,826		(4,230)
Deferred	40,158		18,980		110,159		40,368
Total income tax expense	46,953		17,232		135,985		36,138
Income from continuing operations	81,928		29,374		235,185		63,088
Loss from discontinued operations, net of income taxes					(367)
Net income	81,928		29,374		234,818		63,088
Basic income (loss) per common share:
Income from continuing operations	$ 0.53		$ 0.19		$ 1.52		$ 0.41
Loss from discontinued operations, net of income taxes	$ 0.00		$ 0.00		$ 0.00		$ 0.00
Basic net income per common share	$ 0.53		$ 0.19		$ 1.52		$ 0.41
Diluted income (loss) per common share:
Income from continuing operations	$ 0.53		$ 0.19		$ 1.50		$ 0.41
Loss from discontinued operations, net of income taxes	$ 0.00		$ 0.00		$ 0.00		$ 0.00
Diluted net income per common share	$ 0.53		$ 0.19		$ 1.50		$ 0.41
Weighted average number of common shares outstanding:
Basic	152,617		152,933		153,661		152,682
Diluted	154,120		154,109		155,369		152,682
Cash dividends per common share	$ 0.05		$ 0.05		$ 0.15		$ 0.15
Contract Drilling
Operating revenues:
Oil and gas services	436,827		290,759		1,200,664		741,470
Pressure Pumping
Operating revenues:
Oil and gas services	$ 225,164		$ 81,104		$ 604,954		$ 194,219

[1] Net gains or losses associated with the disposal of assets relate to corporate strategy decisions of the executive management group. Accordingly, the related gains or losses have been separately presented and excluded from the results of specific segments.