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Property, Plant and Equipment (Tables)
 12 Months Ended
Dec. 31, 2017
Property, Plant and Equipment  
Major Components of Property, Plant and Equipment

 

 

 

 

 

 

 

 

 

 

December 31,

 

 

    

2017

    

2016

 

 

 

(In thousands)

 

Land

 

$

52,000

 

$

46,319

 

Buildings

 

 

134,318

 

 

115,502

 

Drilling, workover and well-servicing rigs, and related equipment

 

 

12,997,470

 

 

12,638,749

 

Marine transportation and supply vessels

 

 

4,377

 

 

 —

 

Oilfield hauling and mobile equipment

 

 

272,384

 

 

274,137

 

Other machinery and equipment

 

 

172,674

 

 

181,069

 

Oil and gas properties

 

 

12,286

 

 

12,286

 

Construction-in-process (1)

 

 

284,348

 

 

288,673

 

 

 

$

13,929,857

 

$

13,556,735

 

Less: accumulated depreciation and amortization

 

 

(7,820,292)

 

 

(7,289,152)

 

 

 

$

6,109,565

 

$

6,267,583

 

(1)

Relates primarily to amounts capitalized for new or substantially new drilling rigs and related equipment that were under construction and had not yet been placed in service as of December 31, 2017 or 2016.