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Segment Information (Tables)
 12 Months Ended
Dec. 31, 2017
Segment Reporting [Abstract]  
Schedule of Segment Reporting Information, by Segment
The following table sets forth certain financial information for each of our segments and corporate (amounts in thousands):
 
As of and for the year ended December 31,
 
2017
 
2016
 
2015
 
 
 
 
 
 
Revenues:
 
 
 
 
 
Domestic drilling
$
129,276

 
$
112,399

 
$
205,440

International drilling
41,349

 
6,808

 
43,878

Drilling services
170,625

 
119,207

 
249,318

Well servicing
77,257

 
71,491

 
133,440

Wireline services
163,716

 
67,419

 
120,387

Coiled tubing services
34,857

 
18,959

 
37,633

Production services
275,830

 
157,869

 
291,460

Consolidated revenues
$
446,455

 
$
277,076

 
$
540,778

 
 
 
 
 
 
Operating costs:
 
 
 
 
 
Domestic drilling
$
83,122

 
$
63,686

 
$
108,602

International drilling
31,994

 
9,465

 
35,594

Drilling services
115,116

 
73,151

 
144,196

Well servicing
56,379

 
53,208

 
91,125

Wireline services
128,137

 
57,634

 
88,848

Coiled tubing services
31,248

 
19,956

 
33,847

Production services
215,764

 
130,798

 
213,820

Consolidated operating costs
$
330,880

 
$
203,949

 
$
358,016

 
 
 
 
 
 
Gross margin:
 
 
 
 
 
Domestic drilling
$
46,154

 
$
48,713

 
$
96,838

International drilling
9,355

 
(2,657
)
 
8,284

Drilling services
55,509

 
46,056

 
105,122

Well servicing
20,878

 
18,283

 
42,315

Wireline services
35,579

 
9,785

 
31,539

Coiled tubing services
3,609

 
(997
)
 
3,786

Production services
60,066

 
27,071

 
77,640

Consolidated gross margin
$
115,575

 
$
73,127

 
$
182,762

 
 
 
 
 
 
 
As of and for the year ended December 31,
 
2017
 
2016
 
2015
 
 
 
 
 
 
Identifiable Assets:
 
 
 
 
 
Domestic drilling
$
404,144

 
$
415,953

 
$
463,618

International drilling (1)
36,403

 
36,337

 
54,590

Drilling services
440,547

 
452,290

 
518,208

Well servicing
125,951

 
126,917

 
155,421

Wireline services
92,081

 
80,502

 
94,777

Coiled tubing services
30,254

 
26,062

 
31,332

Production services
248,286

 
233,481

 
281,530

Corporate
78,036

 
14,331

 
22,237

Consolidated identifiable assets
$
766,869

 
$
700,102

 
$
821,975

 
 
 
 
 
 
Depreciation and Amortization:
 
 
 
 
 
Domestic drilling
$
45,243

 
$
53,900

 
$
68,651

International drilling
5,718

 
6,869

 
11,614

Drilling services
50,961

 
60,769

 
80,265

Well servicing
19,943

 
22,925

 
25,810

Wireline services
18,451

 
20,707

 
26,837

Coiled tubing services
8,181

 
8,661

 
16,688

Production services
46,575

 
52,293

 
69,335

Corporate
1,241

 
1,250

 
1,339

Consolidated depreciation and amortization
$
98,777

 
$
114,312

 
$
150,939

 
 
 
 
 
 
Capital Expenditures:
 
 
 
 
 
Domestic drilling
$
19,219

 
$
19,118

 
$
111,839

International drilling
6,319

 
678

 
1,221

Drilling services
25,538

 
19,796

 
113,060

Well servicing
17,776

 
5,274

 
15,716

Wireline services
11,883

 
3,499

 
9,101

Coiled tubing services
5,496

 
3,548

 
4,411

Production services
35,155

 
12,321

 
29,228

Corporate
754

 
439

 
619

Consolidated capital expenditures
$
61,447

 
$
32,556

 
$
142,907

(1) Identifiable assets for our international operations in Colombia include five drilling rigs that are owned by our Colombia subsidiary and three drilling rigs that are owned by one of our domestic subsidiaries and leased to our Colombia subsidiary.
Reconciliation of Operating Profit (Loss) from Segments to Consolidated
The following table reconciles the consolidated gross margin of our segments reported above to loss from operations as reported on the consolidated statements of operations (amounts in thousands):
 
Year ended December 31,
 
2017
 
2016
 
2015
Consolidated gross margin
$
115,575

 
$
73,127

 
$
182,762

Depreciation and amortization
(98,777
)
 
(114,312
)
 
(150,939
)
General and administrative
(69,681
)
 
(61,184
)
 
(73,903
)
Bad debt (expense) recovery
(53
)
 
(156
)
 
188

Impairment
(1,902
)
 
(12,815
)
 
(129,152
)
Gain on dispositions of property and equipment, net
3,608

 
1,892

 
4,344

Loss from operations
$
(51,230
)
 
$
(113,448
)
 
$
(166,700
)