Condensed Consolidated Statements Of Income (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:
Contract drilling	$ 128,927	$ 85,004	$ 342,098	$ 217,919
Oil and natural gas	134,897	96,562	376,393	286,751
Gas gathering and processing	60,688	37,429	144,820	114,908
Other income (loss), net	(667)	(879)	(566)	9,691
Total revenues	323,845	218,116	862,745	629,269
Contract drilling:
Operating costs	73,004	45,406	190,086	132,847
Depreciation	20,818	18,469	57,333	48,700
Oil and natural gas:
Operating costs	29,598	27,092	93,796	75,943
Depreciation, depletion and amortization	47,195	30,091	132,013	81,746
Gas gathering and processing:
Operating costs	53,299	30,743	119,143	92,407
Depreciation and amortization	4,017	3,823	11,627	11,746
General and administrative	7,800	6,637	22,188	19,372
Interest, net	1,351	0	2,078	0
Total operating expenses	237,082	162,261	628,264	462,761
Income before income taxes	86,763	55,855	234,481	166,508
Income tax expense (benefit):
Current	(3,949)	(8,553)	(3,949)	(2,488)
Deferred	37,352	29,917	94,224	66,177
Total income taxes	33,403	21,364	90,275	63,689
Net income	$ 53,360	$ 34,491	$ 144,206	$ 102,819
Net income per common share:
Basic	$ 1.12	$ 0.73	$ 3.03	$ 2.18
Diluted	$ 1.11	$ 0.73	$ 3.01	$ 2.17