XML 88 R40.htm IDEA: XBRL DOCUMENT v2.4.0.6
Property, Plant and Equipment (Tables)
 12 Months Ended
Dec. 31, 2012
Property, Plant and Equipment [Abstract]  
Property, Plant and Equipment
Property, plant and equipment consists of the following (in thousands): 
 
December 31,
 
2012
 
2011
Oil and natural gas properties
 
 
 
Proved(1)
$
12,262,921

 
$
8,969,296

Unproved
865,863

 
689,393

Total oil and natural gas properties
13,128,784

 
9,658,689

Less accumulated depreciation, depletion and impairment
(5,231,182
)
 
(4,791,534
)
Net oil and natural gas properties capitalized costs
7,897,602

 
4,867,155

Land
17,927

 
14,196

Non-oil and natural gas equipment(2)
643,370

 
668,391

Buildings and structures
205,349

 
133,147

Total
866,646

 
815,734

Less accumulated depreciation and amortization
(284,271
)
 
(293,465
)
Other property, plant and equipment, net
582,375

 
522,269

Total property, plant and equipment, net
$
8,479,977

 
$
5,389,424

____________________
(1)
Includes cumulative capitalized interest on oil and natural gas properties of $11.7 million and $1.6 million at December 31, 2012 and 2011, respectively.
(2)
Includes cumulative capitalized interest of approximately $11.4 million and $6.7 million at December 31, 2012 and 2011, respectively.
Capitalized Costs of Unproved Properties Excluded from Amortization
The following table summarizes the costs, by year incurred, related to unproved properties and pipe inventory, which were excluded from oil and natural gas properties subject to amortization at December 31, 2012 (in thousands):
 
 
 
Year Cost Incurred
 
Total
 
2012
 
2011
 
2010
 
2009 and Prior
Property acquisition
$
856,290

 
$
377,185

 
$
76,754

 
$
286,758

 
$
115,593

Exploration(1)
81,940

 
57,579

 
5,846

 
6,285

 
12,230

Total costs incurred
$
938,230

 
$
434,764

 
$
82,600

 
$
293,043

 
$
127,823

____________________
(1)
Includes $72.4 million of pipe inventory costs incurred ($54.9 million in 2012, $2.3 million in 2011, $5.1 million in 2010 and $10.1 million in 2009 and prior years).