Condensed Consolidated Statements Of Income (USD $) In Thousands, except Per Share data	3 Months Ended		6 Months Ended
	Jun. 30, 2011	Jun. 30, 2010	Jun. 30, 2011	Jun. 30, 2010
Revenues:
Contract drilling	$ 115,183	$ 72,061	$ 213,171	$ 132,915
Oil and natural gas	131,662	91,136	241,496	190,189
Gas gathering and processing	44,368	36,344	84,132	77,479
Other income, net	282	5,062	101	10,570
Total revenues	291,495	204,603	538,900	411,153
Contract drilling:
Operating costs	64,238	46,541	117,082	87,441
Depreciation	19,218	16,445	36,515	30,231
Oil and natural gas:
Operating costs	33,417	23,817	64,198	48,851
Depreciation, depletion and amortization	44,550	26,319	84,818	51,655
Gas gathering and processing:
Operating costs	36,789	28,938	65,844	61,664
Depreciation and amortization	3,837	3,982	7,610	7,923
General and administrative	7,496	6,456	14,388	12,735
Interest, net	673	0	727	0
Total operating expenses	210,218	152,498	391,182	300,500
Income before income taxes	81,277	52,105	147,718	110,653
Income tax expense:
Current	0	3,825	0	6,065
Deferred	31,458	16,105	56,872	36,260
Total income taxes	31,458	19,930	56,872	42,325
Net income	$ 49,819	$ 32,175	$ 90,846	$ 68,328
Net income per common share:
Basic	$ 1.05	$ 0.68	$ 1.91	$ 1.45
Diluted	$ 1.04	$ 0.68	$ 1.89	$ 1.43