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Business Segment Information (Tables)
 9 Months Ended
Sep. 30, 2018
Segment Reporting [Abstract]  
Summarized Financial Information of Segments
The following table summarizes financial information for the Company’s three business segments for the periods presented:
 
Exploration and
Production
 
Midstream Services
 
Well Services
 
Eliminations
 
Consolidated
 
(In thousands)
Three months ended September 30, 2018:
 
Revenues from non-affiliates
$
497,161

 
$
33,025

 
$
16,262

 
$
—

 
$
546,448

Inter-segment revenues
—

 
42,745

 
40,177

 
(82,922
)
 
—

Total revenues
497,161

 
75,770

 
56,439

 
(82,922
)
 
546,448

Operating income
146,969

 
31,326

 
9,237

 
(8,487
)
 
179,045

Other expense
(87,594
)
 
(367
)
 
(79
)
 
—

 
(88,040
)
Income before income taxes including non-controlling interests
$
59,375

 
$
30,959

 
$
9,158

 
$
(8,487
)
 
$
91,005

 
 
Three months ended September 30, 2017:
 
Revenues from non-affiliates
$
269,843

 
$
18,767

 
$
16,138

 
$
—

 
$
304,748

Inter-segment revenues
—

 
28,893

 
31,025

 
(59,918
)
 
—

Total revenues
269,843

 
47,660

 
47,163

 
(59,918
)
 
304,748

Operating income
3,484

 
25,194

 
10,802

 
(7,086
)
 
32,394

Other income (expense)
(92,319
)
 
(15
)
 
30

 
—

 
(92,304
)
Income (loss) before income taxes including non-controlling interests
$
(88,835
)
 
$
25,179

 
$
10,832

 
$
(7,086
)
 
$
(59,910
)
 
 
Nine months ended September 30, 2018:
 
Revenues from non-affiliates
$
1,328,994

 
$
93,663

 
$
46,344

 
$
—

 
$
1,469,001

Inter-segment revenues
—

 
119,095

 
114,898

 
(233,993
)
 
—

Total revenues
1,328,994

 
212,758

 
161,242

 
(233,993
)
 
1,469,001

Operating income (loss)
(53,159
)
 
101,457

 
25,415

 
(24,357
)
 
49,356

Other expense
(370,311
)
 
(703
)
 
(99
)
 
—

 
(371,113
)
Income (loss) before income taxes including non-controlling interests
$
(423,470
)
 
$
100,754

 
$
25,316

 
$
(24,357
)
 
$
(321,757
)
 
 
Nine months ended September 30, 2017:
 
Revenues from non-affiliates
$
761,450

 
$
48,939

 
$
33,566

 
$
—

 
$
843,955

Inter-segment revenues
—

 
76,674

 
68,028

 
(144,702
)
 
—

Total revenues
761,450

 
125,613

 
101,594

 
(144,702
)
 
843,955

Operating income (loss)
(12,972
)
 
69,059

 
9,161

 
(7,383
)
 
57,865

Other income (expense)
(59,027
)
 
(13
)
 
34

 
—

 
(59,006
)
Income (loss) before income taxes including non-controlling interests
$
(71,999
)
 
$
69,046

 
$
9,195

 
$
(7,383
)
 
$
(1,141
)
 
 
At September 30, 2018:
 
Property, plant and equipment, net
$
6,227,767

 
$
841,797

 
$
41,468

 
$
(210,895
)
 
$
6,900,137

Total assets(1)
6,675,626

 
867,226

 
49,285

 
(175,706
)
 
7,416,431

At December 31, 2017:
 
 
 
 
 
 
 
 
 
Property, plant and equipment, net
$
5,663,323

 
$
649,923

 
$
46,779

 
$
(186,539
)
 
$
6,173,486

Total assets(1)
6,050,255

 
663,614

 
52,800

 
(151,539
)
 
6,615,130

___________________
(1)
Intercompany receivables (payables) for all segments were reclassified to capital contributions from (distributions to) parent and not included in total assets.