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Business Segment Information
 3 Months Ended
Mar. 31, 2015
Segment Reporting [Abstract]  
Business Segment Information
Business Segment Information

The Company has three reportable 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 exploration 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 and coordinates the delivery of electricity to the Company’s exploration and production operations in the Mid-Continent. The All Other column in the tables below includes items not related to the Company’s reportable segments, including the Company’s corporate operations.

Management evaluates the performance of the Company’s business segments based on income (loss) from operations. Summarized financial information concerning the Company’s segments is shown in the following table (in thousands):
 
Exploration and Production(1)
 
Drilling and Oil Field Services
 
Midstream Services
 
All Other
 
Consolidated Total
Three Months Ended March 31, 2015
 
 
 
 
 
 
 
 
 
Revenues
$
195,743

 
$
24,629

 
$
21,529

 
$
967

 
$
242,868

Inter-segment revenue
(11
)
 
(14,784
)
 
(12,765
)
 
—

 
(27,560
)
Total revenues
$
195,732

 
$
9,845

 
$
8,764

 
$
967

 
$
215,308

Loss from operations
$
(1,054,158
)
 
$
(7,772
)
 
$
(3,873
)
 
$
(22,653
)
 
$
(1,088,456
)
Interest expense, net
(16
)
 
—

 
—

 
(62,826
)
 
(62,842
)
Other (expense) income, net
(454
)
 
(4
)
 
4

 
(82
)
 
(536
)
Loss before income taxes
$
(1,054,628
)
 
$
(7,776
)
 
$
(3,869
)
 
$
(85,561
)
 
$
(1,151,834
)
Capital expenditures(2)
$
302,062

 
$
1,875

 
$
8,432

 
$
7,822

 
$
320,191

Depreciation, depletion, amortization and accretion
$
107,211

 
$
5,760

 
$
2,679

 
$
4,884

 
$
120,534

At March 31, 2015
 
 
 
 
 
 
 
 
 
Total assets
$
5,301,850

 
$
103,668

 
$
221,048

 
$
430,639

 
$
6,057,205

Three Months Ended March 31, 2014
 
 
 
 
 
 
 
 
 
Revenues
$
407,338

 
$
47,080

 
$
46,294

 
$
969

 
$
501,681

Inter-segment revenue
—

 
(29,977
)
 
(28,648
)
 
—

 
(58,625
)
Total revenues
$
407,338

 
$
17,103

 
$
17,646

 
$
969

 
$
443,056

Loss from operations
$
(56,475
)
 
$
(3,102
)
 
$
(1,411
)
 
$
(21,342
)
 
$
(82,330
)
Interest income (expense), net
143

 
—

 
—

 
(62,186
)
 
(62,043
)
Other (expense) income, net
(185
)
 
(398
)
 
—

 
2,677

 
2,094

Loss before income taxes
$
(56,517
)
 
$
(3,500
)
 
$
(1,411
)
 
$
(80,851
)
 
$
(142,279
)
Capital expenditures(2)
$
264,243

 
$
620

 
$
5,957

 
$
4,954

 
$
275,774

Depreciation, depletion, amortization and accretion
$
121,041

 
$
7,711

 
$
2,441

 
$
5,260

 
$
136,453

At December 31, 2014
 
 
 
 
 
 
 
 
 
Total assets
$
6,273,802

 
$
115,083

 
$
219,691

 
$
650,649

 
$
7,259,225

____________________
(1)
Loss from operations includes a full cost ceiling limitation impairment of $1.1 billion and $164.8 million for the three-month periods ended March 31, 2015 and March 31, 2014, respectively.
(2)
On an accrual basis and exclusive of acquisitions.