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Industry Segment Information (Tables)
 6 Months Ended
Jun. 30, 2012
Segment Reporting [Abstract]  
Revenue From Different Segments
The following table provides certain information about the operations of each of our segments:
 
 
Three Months Ended
June 30,
 
Six Months Ended
June 30,
 
2012
 
2011
 
2012
 
2011
 
(In thousands)
Revenues:
 
 
 
 
 
 
 
Contract drilling
$
160,925

 
$
129,281

 
$
313,384

 
$
241,789

Elimination of inter-segment revenue
(14,053
)
 
(14,098
)
 
(25,606
)
 
(28,618
)
Contract drilling net of inter-segment revenue
146,872

 
115,183

 
287,778

 
213,171

Oil and natural gas
132,553

 
131,662

 
266,325

 
241,496

Gas gathering and processing
65,901

 
63,894

 
140,156

 
120,902

Elimination of inter-segment revenue
(16,154
)
 
(19,526
)
 
(33,114
)
 
(36,770
)
Gas gathering and processing net of inter-segment revenue
49,747

 
44,368

 
107,042

 
84,132

Other
720

 
282

 
1,175

 
101

Total revenues
$
329,892

 
$
291,495

 
$
662,320

 
$
538,900

Operating income (loss):
 
 
 
 
 
 
 
Contract drilling
$
50,815

 
$
31,727

 
$
94,220

 
$
59,574

Oil and natural gas
(73,753
)
(2) 
53,695

 
(27,787
)
(2) 
92,480

Gas gathering and processing
2,072

 
3,742

 
6,620

 
10,678

Total operating income (loss) (1)
(20,866
)
 
89,164

 
73,053

 
162,732

General and administrative expense
(8,376
)
 
(7,496
)
 
(15,380
)
 
(14,388
)
Interest expense, net
(2,542
)
 
(673
)
 
(4,368
)
 
(727
)
Other
720

 
282

 
1,175

 
101

Income (loss) before income taxes
$
(31,064
)
 
$
81,277

 
$
54,480

 
$
147,718


(1) Total operating income (loss) is total operating revenues less operating expenses, depreciation, depletion, amortization and impairment and does not include non-operating revenues, general corporate expenses, interest expense or income taxes.
(2) In June 2012, we had a non-cash ceiling test write-down of $115.9 million pre-tax ($72.1 million, net of tax).