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Business Segment Information (Tables)
 6 Months Ended
Jun. 30, 2014
Segment Reporting [Abstract]  
Summarized Financial Information of Segments
The following table summarizes financial information for the Company’s segments for the periods presented:
 
 
Exploration and
Production
 
Well Services
 
Midstream Services
 
Consolidated
 
(In thousands)
Three months ended June 30, 2014:
 
Revenues
$
354,183

 
$
58,447

 
$
13,478

 
$
426,108

Inter-segment revenues
—

 
(43,570
)
 
(10,160
)
 
(53,730
)
Total revenues
354,183

 
14,877

 
3,318

 
372,378

Operating income
158,353

 
6,858

 
1,334

 
166,545

Other income (expense)
(104,448
)
 
23

 
—

 
(104,425
)
Income before income taxes
53,905

 
6,881

 
1,334

 
62,120

 
 
Three months ended June 30, 2013:
 
 
 
 
 
 
 
Revenues
$
241,842

 
$
31,382

 
$
7,035

 
$
280,259

Inter-segment revenues
—

 
(19,921
)
 
(5,756
)
 
(25,677
)
Total revenues
241,842

 
11,461

 
1,279

 
254,582

Operating income
105,459

 
3,310

 
4,681

 
113,450

Other income (expense)
(8,511
)
 
4

 
—

 
(8,507
)
Income before income taxes
96,948

 
3,314

 
4,681

 
104,943

 
 
Six months ended June 30, 2014:
 
Revenues
$
686,030

 
$
110,853

 
$
22,831

 
$
819,714

Inter-segment revenues
—

 
(80,149
)
 
(17,668
)
 
(97,817
)
Total revenues
686,030

 
30,704

 
5,163

 
721,897

Operating income
484,886

 
8,478

 
2,261

 
495,625

Other income (expense)
(162,108
)
 
75

 
—

 
(162,033
)
Income before income taxes
322,778

 
8,553

 
2,261

 
333,592

 
 
Six months ended June 30, 2013:
 
 
 
 
 
 
 
Revenues
$
483,493

 
$
67,150

 
$
11,855

 
$
562,498

Inter-segment revenues
—

 
(49,975
)
 
(9,637
)
 
(59,612
)
Total revenues
483,493

 
17,175

 
2,218

 
502,886

Operating income
218,357

 
5,873

 
7,173

 
231,403

Other income (expense)
(43,530
)
 
8

 
—

 
(43,522
)
Income before income taxes
174,827

 
5,881

 
7,173

 
187,881

 
 
Total assets:
 
As of June 30, 2014
$
4,844,196

 
$
77,050

 
$
115,733

 
$
5,036,979

As of December 31, 2013
4,532,264

 
70,708

 
108,952

 
4,711,924