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Industry Segment Information (Tables)
 6 Months Ended
Jun. 30, 2013
Segment Reporting [Abstract]  
Industry segment information
The following table provides certain information about the operations of each of our segments:
 
Three Months Ended
June 30,
 
Six Months Ended
June 30,
 
 
2013
 
2012
 
2013
 
2012
 
 
(In thousands)
 
(In thousands)
 
Revenues:
 
 
 
 
 
 
 
 
Oil and natural gas
$
164,799

 
$
131,166

 
$
318,408

 
$
266,931

 
 
 
 
 
 
 
 
 
 
Contract drilling
118,660

 
160,925

 
238,013

 
313,384

 
Elimination of inter-segment revenue
(13,655
)
 
(14,053
)
 
(25,480
)
 
(25,606
)
 
Contract drilling net of inter-segment revenue
105,005

 
146,872

 
212,533

 
287,778

 
 
 
 
 
 
 
 
 
 
Gas gathering and processing
92,910

 
65,901

 
173,066

 
140,156

 
Elimination of inter-segment revenue
(22,293
)
 
(16,154
)
 
(45,054
)
 
(33,114
)
 
Gas gathering and processing net of inter-segment revenue
70,617

 
49,747

 
128,012

 
107,042

 
 
 
 
 
 
 
 
 
 
Total revenues
$
340,421

 
$
327,785

 
$
658,953

 
$
661,751

 
Operating income (loss):

 

 

 

 
Oil and natural gas
$
64,470

 
$
(75,140
)
(2 
) 
$
123,058

 
$
(27,181
)
(2 
) 
Contract drilling
23,507

 
50,815

 
47,773

 
94,220

 
Gas gathering and processing
2,846

 
2,072

 
3,675

 
6,620

 
Total operating income (loss) (1)
90,823

 
(22,253
)
 
174,506

 
73,659

 
General and administrative
(9,679
)
 
(8,376
)
 
(18,352
)
 
(15,380
)
 
Gain on disposition of assets
3,483

 
651

 
3,399

 
1,239

 
Gain (loss) on derivatives not designated as hedges and hedge ineffectiveness, net
16,344

 
1,387

 
10,420

 
(606
)
 
Interest expense, net
(4,591
)
 
(2,542
)
 
(8,152
)
 
(4,368
)
 
Other
(91
)
 
69

 
(157
)
 
(64
)
 
Income (loss) before income taxes
$
96,289

 
$
(31,064
)
 
$
161,664

 
$
54,480

 

(1)
Total operating income is total operating revenues less operating expenses, depreciation, depletion, amortization, and impairment and does not include non-operating revenues, general corporate expenses, gain on disposition of assets, 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).