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PROPERTIES AND EQUIPMENT, NET (Tables)
 9 Months Ended
Sep. 30, 2013
PROPERTIES AND EQUIPMENT, NET  
Components of net properties and equipment

 

 

 

 

September 30,

 

December 31,

 

(In thousands)

 

2013

 

2012

 

 

 

 

 

 

 

Proved oil and gas properties

 

$

6,522,753

 

$

5,724,940

 

Unproved oil and gas properties

 

444,353

 

467,483

 

Gathering and pipeline systems

 

240,285

 

239,656

 

Land, building and other equipment

 

92,740

 

86,137

 

 

 

7,300,131

 

6,518,216

 

Accumulated depreciation, depletion and amortization

 

(2,609,955

)

(2,207,239

)

 

 

$

4,690,176

 

$

4,310,977