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Property, Plant and Equipment (Tables)
 12 Months Ended
Dec. 31, 2018
Property, Plant and Equipment  
Major Components of Property, Plant and Equipment

 

 

 

 

 

 

 

 

 

 

December 31,

 

 

    

2018

    

2017

 

 

 

(In thousands)

 

Land

 

$

43,187

 

$

52,000

 

Buildings

 

 

123,619

 

 

134,318

 

Drilling rigs and related equipment

 

 

13,021,580

 

 

12,997,470

 

Marine transportation and supply vessels

 

 

 —

 

 

4,377

 

Oilfield hauling and mobile equipment

 

 

267,223

 

 

272,384

 

Other machinery and equipment

 

 

197,094

 

 

172,674

 

Oil and gas properties

 

 

12,286

 

 

12,286

 

Construction-in-process (1)

 

 

30,395

 

 

284,348

 

 

 

$

13,695,384

 

$

13,929,857

 

Less: accumulated depreciation and amortization

 

 

(8,227,514)

 

 

(7,820,292)

 

 

 

$

5,467,870

 

$

6,109,565

 

(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, 2018 or 2017.