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Business Segment Information
 12 Months Ended
Dec. 31, 2015
Segment Reporting [Abstract]  
Business Segment Information
Business Segment Information
The Company’s exploration and production segment is engaged in the acquisition and development of oil and natural gas properties. Revenues for the exploration and production segment are derived from the sale of oil and natural gas production. The Company’s well services business segment (OWS) performs completion services for the Company’s oil and natural gas wells operated by OPNA. Revenues for the well services segment are derived from providing well completion services, well completion product sales and tool rentals. The Company’s midstream services business segment (OMS) performs salt water gathering and disposal and other midstream services for the Company’s oil and natural gas wells operated by OPNA. Revenues for the midstream segment are primarily derived from salt water pipeline transport, salt water disposal and fresh water sales. The revenues and expenses related to work performed by OWS and OMS for OPNA’s working interests are eliminated in consolidation, and only the revenues and expenses related to non-affiliated working interest owners are included in the Company’s Consolidated Statement of Operations. These segments represent the Company’s three current operating units, each offering different products and services. The Company’s corporate activities have been allocated to the supported business segments accordingly.
Management evaluates the performance of the Company’s business segments based on operating income, which is defined as segment operating revenues less operating expenses, including DD&A. The following table summarizes financial information for the Company’s three business segments for the periods presented:
 
Exploration and
Production
 
Well Services
 
Midstream Services
 
Eliminations
 
Consolidated
 
(In thousands)
Year Ended December 31, 2015
 
Revenues from external customers
$
721,672

 
$
44,294

 
$
23,769

 
$
—

 
$
789,735

Inter-segment revenues
—

 
177,184

 
80,926

 
(258,110
)
 
—

Total revenues
721,672

 
221,478


104,695

 
(258,110
)
 
789,735

Operating income (loss)
(177,512
)
 
49,145

 
60,668

 
(46,465
)
 
(114,164
)
Other income (expense)
58,542

 
52

 
(801
)
 
—

 
57,793

Income (loss) before income taxes
$
(118,970
)
 
$
49,197

 
$
59,867

 
$
(46,465
)
 
$
(56,371
)
Total assets(1)
$
5,478,439

 
$
470,614

 
$
409,635

 
$
(709,313
)
 
$
5,649,375

Capital expenditures(2)
537,806

 
21,711

 
96,947

 
(46,465
)
 
609,999

Depreciation, depletion and amortization
479,693

 
19,073

 
5,764

 
(19,208
)
 
485,322

Impairment of oil and gas properties
46,109

 
—

 
—

 
—

 
46,109

 
 
 
 
 
 
 
 
 
 
Year Ended December 31, 2014
 
Revenues from external customers
$
1,304,004

 
$
74,610

 
$
11,614

 
$
—

 
$
1,390,228

Inter-segment revenues
—

 
192,774

 
39,344

 
(232,118
)
 
—

Total revenues
1,304,004

 
267,384

 
50,958

 
(232,118
)
 
1,390,228

Operating income
610,850

 
70,878

 
22,730

 
(58,806
)
 
645,652

Other income (expense)
168,741

 
75

 
—

 
—

 
168,816

Income before income taxes
$
779,591

 
$
70,953

 
$
22,730

 
$
(58,806
)
 
$
814,468

Total assets
$
5,772,959

 
$
281,844

 
$
212,685

 
$
(358,412
)
 
$
5,909,076

Capital expenditures(2)
1,525,168

 
37,292

 
68,939

 
(58,806
)
 
1,572,593

Depreciation, depletion and amortization
406,960

 
14,080

 
3,744

 
(12,450
)
 
412,334

Impairment of oil and gas properties
47,238

 
—

 
—

 
—

 
47,238

 
 
 
 
 
 
 
 
 
 
Year Ended December 31, 2013
 
 
 
 
 
 
 
 
 
Revenues from external customers
$
1,084,412

 
$
51,845

 
$
5,742

 
$
—

 
$
1,141,999

Inter-segment revenues
—

 
128,841

 
23,488

 
(152,329
)
 
—

Total revenues
1,084,412

 
180,686

 
29,230

 
(152,329
)
 
1,141,999

Operating income
473,178

 
56,322

 
17,509

 
(42,611
)
 
504,398

Other income (expense)
(141,397
)
 
16

 
—

 
—

 
(141,381
)
Income before income taxes
$
331,781

 
$
56,338

 
$
17,509

 
$
(42,611
)
 
$
363,017

Total assets(1)
$
4,558,257

 
$
78,359

 
$
117,641

 
$
(76,216
)
 
$
4,678,041

Capital expenditures(2)
2,514,737

 
15,217

 
18,955

 
(42,611
)
 
2,506,298

Depreciation, depletion and amortization
304,388

 
7,150

 
2,780

 
(7,263
)
 
307,055

__________________ 
(1)
Total assets for the exploration and production segment include $26.7 million and $137.1 million of assets held for sale as of December 31, 2015 and 2013, respectively.
(2)
Capital expenditures (including acquisitions) reflected in the table above differ from the amounts for capital expenditures and acquisition of oil and gas properties shown in the Company’s Consolidated Statement of Cash Flows because amounts reflected in the table include changes in accrued liabilities from the previous reporting period for capital expenditures, while the amounts presented in the Consolidated Statement of Cash Flows are presented on a cash basis.