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Business Segment Information
 3 Months Ended
Mar. 31, 2013
Segment Reporting [Abstract]  
Business Segment Information
Business Segment Information

The Company has three business segments: exploration and production, drilling and oil field services and midstream services. These segments represent the Company’s three main business units, each offering different products and services. The exploration and production segment is engaged in the acquisition, development and production of oil and natural gas properties and includes the activities of the Royalty Trusts. The drilling and oil field services segment is engaged in the contract drilling of oil and natural gas wells and provides various oil field services. The midstream services segment is engaged in the purchasing, gathering, treating and selling of natural gas. The All Other column in the tables below includes items not related to the Company’s reportable segments, including the Company’s CO2 gathering and sales as well as its corporate operations.

Management evaluates the performance of the Company’s business segments based on income (loss) from operations, which is defined as segment operating revenues less operating expenses and depreciation, depletion, amortization and accretion. Summarized financial information concerning the Company’s segments is shown in the following table (in thousands):
 
Exploration and Production
 
Drilling and Oil Field Services
 
Midstream Services
 
All Other
 
Consolidated Total
Three Months Ended March 31, 2013
 
 
 
 
 
 
 
 
 
Revenues
$
481,410

 
$
49,737

 
$
36,834

 
$
853

 
$
568,834

Inter-segment revenue
(81
)
 
(32,367
)
 
(24,696
)
 
—

 
(57,144
)
Total revenues
$
481,329

 
$
17,370

 
$
12,138

 
$
853

 
$
511,690

 
 
 
 
 
 
 
 
 
 
Loss from operations(1)
$
(301,707
)
 
$
(8,965
)
 
$
(2,459
)
 
$
(46,395
)
 
$
(359,526
)
Interest income (expense), net
318

 
—

 
(125
)
 
(86,103
)
 
(85,910
)
Loss on extinguishment of debt
—

 
—

 
—

 
(82,005
)
 
(82,005
)
Other income (expense), net
628

 
—

 
(800
)
 
783

 
611

Loss before income taxes
$
(300,761
)
 
$
(8,965
)
 
$
(3,384
)
 
$
(213,720
)
 
$
(526,830
)
Capital expenditures(2)
$
357,591

 
$
632

 
$
15,221

 
$
15,268

 
$
388,712

Depreciation, depletion, amortization and accretion
$
167,513

 
$
8,814

 
$
1,687

 
$
4,627

 
$
182,641

At March 31, 2013
 
 
 
 
 
 
 
 
 
Total assets
$
5,647,302

 
$
192,087

 
$
159,843

 
$
1,679,079

 
$
7,678,311

Three Months Ended March 31, 2012
 
 
 
 
 
 
 
 
 
Revenues
$
343,120

 
$
98,332

 
$
26,162

 
$
1,416

 
$
469,030

Inter-segment revenue
(77
)
 
(69,023
)
 
(18,295
)
 
—

 
(87,395
)
Total revenues
$
343,043

 
$
29,309

 
$
7,867

 
$
1,416

 
$
381,635

 
 
 
 
 
 
 
 
 
 
(Loss) income from operations(1)
$
(123,836
)
 
$
3,479

 
$
(2,727
)
 
$
(28,572
)
 
$
(151,656
)
Interest income (expense), net
143

 
—

 
(156
)
 
(66,952
)
 
(66,965
)
Other income, net
1,768

 
—

 
—

 
700

 
2,468

(Loss) income before income taxes
$
(121,925
)
 
$
3,479

 
$
(2,883
)
 
$
(94,824
)
 
$
(216,153
)
Capital expenditures(2)
$
491,905

 
$
7,916

 
$
23,975

 
$
45,862

 
$
569,658

Depreciation, depletion, amortization and accretion
$
90,052

 
$
8,550

 
$
1,411

 
$
4,173

 
$
104,186

At December 31, 2012
 
 
 
 
 
 
 
 
 
Total assets
$
8,681,056

 
$
199,523

 
$
151,492

 
$
758,660

 
$
9,790,731

____________________
(1)
Exploration and production segment income from operations includes unrealized losses of $24.8 million and $129.2 million on commodity derivative contracts for the three-month periods ended March 31, 2013 and 2012, respectively. Exploration and production segment also includes a loss on the sale of the Permian Properties of $399.1 million for the three-month period ended March 31, 2013.
(2)
On an accrual basis.