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Property and Equipment (Tables)
6 Months Ended
Jun. 30, 2018
Property Plant And Equipment [Abstract]  
Property and Equipment

Property and equipment consisted of the following at June 30, 2018 and December 31, 2017 (in thousands):

 

June 30,

 

 

December 31,

 

 

2018

 

 

2017

 

Equipment

$

8,275,471

 

 

$

8,066,404

 

Oil and natural gas properties

 

215,846

 

 

 

211,566

 

Buildings

 

185,282

 

 

 

185,475

 

Land

 

26,144

 

 

 

26,593

 

Total property and equipment

 

8,702,743

 

 

 

8,490,038

 

Less accumulated depreciation, depletion and impairment

 

(4,494,046

)

 

 

(4,235,308

)

Property and equipment, net

$

4,208,697

 

 

$

4,254,730