Condensed Consolidated Statements Of Operations (USD $) In Thousands, except Per Share data, unless otherwise specified	3 Months Ended
	Mar. 31, 2012	Mar. 31, 2011
Revenues:
Drilling services	$ 124,304	$ 99,756
Production services	107,674	53,593
Total revenues	231,978	153,349
Costs and expenses:
Drilling services	81,077	67,509
Production services	60,696	33,228
Depreciation and amortization	38,373	32,256
General and administrative	21,143	14,521
Bad debt recovery	(91)	(84)
Impairment of equipment	1,032	0
Total costs and expenses	202,230	147,430
Income from operations	29,748	5,919
Other (expense) income:
Interest expense	(9,555)	(7,539)
Other	932	(6,517)
Total other expense	(8,623)	(14,056)
Income (loss) before income taxes	21,125	(8,137)
Income tax (expense) benefit	(6,953)	2,102
Net income (loss)	$ 14,172	$ (6,035)
Income (loss) per common share - Basic (USD per share)	$ 0.23	$ (0.11)
Income (loss) per common share - Diluted (USD per share)	$ 0.23	$ (0.11)
Weighted average number of shares outstanding - Basic	61,578	53,968
Weighted-average number of shares outstanding - Diluted	62,647	53,968