Condensed Consolidated Statements Of Operations (USD $) In Thousands, except Per Share data, unless otherwise specified	3 Months Ended		6 Months Ended
	Jun. 30, 2012	Jun. 30, 2011	Jun. 30, 2012	Jun. 30, 2011
Revenues:
Contract drilling	$ 146,872	$ 115,183	$ 287,778	$ 213,171
Oil and natural gas	132,553	131,662	266,325	241,496
Gas gathering and processing	49,747	44,368	107,042	84,132
Other	720	282	1,175	101
Total revenues	329,892	291,495	662,320	538,900
Contract drilling:
Operating costs	74,819	64,238	150,992	117,082
Depreciation	21,238	19,218	42,566	36,515
Oil and natural gas:
Operating costs	33,279	33,417	68,888	64,198
Depreciation, depletion and amortization	57,153	44,550	109,350	84,818
Impairment of oil and gas properties	115,874	0	115,874	0
Gas gathering and processing:
Operating costs	42,363	36,789	89,976	65,844
Depreciation and amortization	5,312	3,837	10,446	7,610
General and administrative	8,376	7,496	15,380	14,388
Interest, net	2,542	673	4,368	727
Total operating expenses	360,956	210,218	607,840	391,182
Income (loss) before income taxes	(31,064)	81,277	54,480	147,718
Income tax expense (benefit):
Current	(2,066)	0	(2,066)	0
Deferred	(9,696)	31,458	23,409	56,872
Total income taxes	(11,762)	31,458	21,343	56,872
Net income (loss)	$ (19,302)	$ 49,819	$ 33,137	$ 90,846
Net income (loss) per common share:
Basic	$ (0.40)	$ 1.05	$ 0.69	$ 1.91
Diluted	$ (0.40)	$ 1.04	$ 0.69	$ 1.89