XML 121 R21.htm IDEA: XBRL DOCUMENT v2.4.0.8
PROPERTIES AND EQUIPMENT, NET (Tables)
 6 Months Ended
Jun. 30, 2013
PROPERTIES AND EQUIPMENT, NET  
Components of net property, plant, and equipment

 

 

 

 

June 30,

 

December 31,

 

(In thousands)

 

2013

 

2012

 

 

 

 

 

 

 

Proved oil and gas properties

 

$

6,245,196

 

$

5,724,940

 

Unproved oil and gas properties

 

458,047

 

467,483

 

Gathering and pipeline systems

 

240,062

 

239,656

 

Land, building and other equipment

 

90,690

 

86,137

 

 

 

7,033,995

 

6,518,216

 

Accumulated depreciation, depletion and amortization

 

(2,475,788

)

(2,207,239

)

 

 

$

4,558,207

 

$

4,310,977