| Summary of Crude Oil and Natural Gas Activities |
The following table discloses certain financial data relating to the Company's crude oil and natural gas activities, all of which are located in the United States.
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For the year ended December 31, |
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2012 |
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2011 |
|
2010 |
Capitalized costs incurred: |
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Evaluated Properties- |
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Beginning of period balance |
$ |
1,421,640 |
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$ |
1,316,677 |
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$ |
1,593,884 |
|
Deconsolidation of Subsidiary January 1, 2010 |
— |
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— |
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(364,589 |
) |
Capitalized G&A |
12,148 |
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|
11,205 |
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|
10,676 |
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Property acquisition costs |
2,075 |
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— |
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— |
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Exploration costs |
22,703 |
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|
5,473 |
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|
14,739 |
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Development costs |
38,444 |
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|
88,285 |
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|
61,967 |
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End of period balance |
$ |
1,497,010 |
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$ |
1,421,640 |
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$ |
1,316,677 |
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Unevaluated Properties (excluded from amortization): |
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Beginning of period balance |
$ |
2,603 |
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$ |
8,106 |
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$ |
25,442 |
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Acquisitions |
29,590 |
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|
2,422 |
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|
1,374 |
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Exploration |
34,674 |
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|
1,372 |
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|
2,187 |
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Capitalized interest |
2,109 |
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|
573 |
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|
2,000 |
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Transfers to evaluated |
(200 |
) |
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(9,870 |
) |
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(22,897 |
) |
End of period balance |
$ |
68,776 |
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$ |
2,603 |
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$ |
8,106 |
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Accumulated depreciation, depletion and amortization: |
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Beginning of period balance |
$ |
1,208,331 |
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$ |
1,155,915 |
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$ |
1,488,718 |
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Provision charged to expense |
48,524 |
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|
52,416 |
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|
31,786 |
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Deconsolidation of Subsidiary January 1, 2010 |
— |
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— |
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(364,589 |
) |
Sale of mineral interests |
39,410 |
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— |
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— |
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End of period balance |
$ |
1,296,265 |
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$ |
1,208,331 |
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$ |
1,155,915 |
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