Industry Segment Information (Tables)

3 Months Ended

Mar. 31, 2012

Industry Segment Information [Abstract]

Revenue From Different Segments

	Three Months Ended March 31,
	2012			2011
	(In thousands)
Revenues:
Contract drilling	$	152,459		$	112,508
Elimination of inter-segment revenue		(11,553	)		(14,520	)
Contract drilling net of inter-segment revenue		140,906			97,988
Oil and natural gas		133,772			109,834
Gas gathering and processing		74,255			57,008
Elimination of inter-segment revenue		(16,960	)		(17,244	)
Gas gathering and processing net of inter-segment revenue		57,295			39,764
Other		455			(181	)
Total revenues	$	332,428		$	247,405
Operating income:
Contract drilling	$	43,405		$	27,847
Oil and natural gas		45,966			38,785
Gas gathering and processing		4,548			6,936
Total operating income (1)		93,919			73,568
General and administrative expense		(7,004	)		(6,892	)
Interest expense, net		(1,826	)		(54	)
Other		455			(181	)
Income before income taxes	$	85,544		$	66,441