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Properties and Equipment, Net
 6 Months Ended
Jun. 30, 2019
Property, Plant and Equipment [Abstract]  
Properties and Equipment, Net Properties and Equipment, Net
Properties and equipment, net are comprised of the following:
(In thousands)
 
June 30,
2019
 
December 31,
2018
Proved oil and gas properties
 
$
6,138,447

 
$
5,717,145

Unproved oil and gas properties
 
178,204

 
194,435

Land, building and other equipment
 
98,534

 
94,797

 
 
6,415,185

 
6,006,377

Accumulated depreciation, depletion and amortization
 
(2,715,610
)
 
(2,542,771
)
 
 
$
3,699,575

 
$
3,463,606


At June 30, 2019, the Company did not have any projects that had exploratory well costs capitalized for a period of greater than one year after drilling.