Condensed 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
Revenues:
Drilling services	$ 108,764	$ 85,667	$ 315,043	$ 217,580
Production services	78,887	49,877	197,242	121,012
Total revenues	187,651	135,544	512,285	338,592
Costs and expenses:
Drilling services	72,430	59,957	213,129	164,409
Production services	44,394	29,196	115,376	73,688
Depreciation and amortization	32,992	30,847	97,672	89,275
General and administrative	17,705	13,030	48,086	36,760
Bad debt expense (recovery)	322	(22)	377	(104)
Impairment of equipment	484	0	484	0
Total costs and expenses	168,327	133,008	475,124	364,028
Income (loss) from operations	19,324	2,536	37,161	(25,436)
Other income (expense):
Interest expense	(6,137)	(7,573)	(21,659)	(18,746)
Other	(1,193)	845	(6,956)	1,644
Total other expense	(7,330)	(6,728)	(28,615)	(17,102)
Income (loss) before income taxes	11,994	(4,192)	8,546	(42,538)
Income tax (expense) benefit	(5,250)	1,612	(4,187)	15,269
Net income (loss)	$ 6,744	$ (2,580)	$ 4,359	$ (27,269)
Income (loss) per common share - Basic	$ 0.11	$ (0.05)	$ 0.08	$ (0.51)
Income (loss) per common share - Diluted	$ 0.11	$ (0.05)	$ 0.08	$ (0.51)
Weighted-average number of shares outstanding - Basic	59,898	53,811	56,045	53,770
Weighted-average number of shares outstanding - Diluted	61,428	53,811	57,522	53,770