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Property And Equipment, Net
9 Months Ended
Sep. 30, 2013
Property, Plant and Equipment [Abstract]  
Property And Equipment, Net
4. Property and Equipment, Net
At September 30, 2013 and December 31, 2012, property and equipment, net consisted of the following:
 
 
September 30,
2013
 
December 31,
2012
 
 
(In thousands)
Proved oil and gas properties
 
$
2,207,220

 
$
1,713,827

Accumulated depreciation, depletion and amortization
 
(711,239
)
 
(561,279
)
Proved oil and gas properties, net
 
1,495,981

 
1,152,548

Unproved properties, not being amortized
 
 
 
 
Unevaluated leasehold and seismic costs
 
302,391

 
238,833

Exploratory wells in progress
 
41,926

 
43,803

Capitalized interest
 
50,974

 
41,052

Total unproved properties, not being amortized
 
395,291

 
323,688

Other property and equipment
 
16,323

 
17,079

Accumulated depreciation
 
(6,523
)
 
(5,641
)
Other property and equipment, net
 
9,800

 
11,438

Total property and equipment, net
 
$
1,901,072

 
$
1,487,674



Utica Shale Joint Venture. On January 15, 2013, we exercised our option for an additional 40% in the remaining properties held through our joint venture with ACP II Marcellus LLC (“ACP II”), which is also one of our joint venture partners in the Marcellus Shale, and ACP III Utica LLC (“ACP III”), both affiliates of Avista Capital Holdings, LP, a private equity firm (collectively with ACP II and ACP III, “Avista”) by paying $63.1 million. Following the option exercise, the Company elected to acquire additional properties on an equal basis with Avista. In connection with the January 2013 exercise of the Company's option to increase its participating interest in the Avista Utica joint venture properties, its right to receive distributions associated with properties owned by ACP III through “B Units” interest in ACP III that the Company acquired at the formation of the Utica joint venture was terminated.