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Property, Plant and Equipment (Tables) | 12 Months Ended
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Dec. 31, 2018
Property, Plant and Equipment [Abstract] |
Property, Plant and Equipment | Property, plant and equipment consists of the following (in thousands):
| December 31, |  |
| 2018 |  | 2017
Oil and natural gas properties |  |  |
Proved | $ | 1,269,091 |  | $ | 1,056,806
Unproved | 60,152 |  | 100,884
Total oil and natural gas properties | 1,329,243 |  | 1,157,690
Less accumulated depreciation, depletion and impairment | (580,132) |  | (460,431)
Net oil and natural gas properties capitalized costs | 749,111 |  | 697,259
Land | 4,400 |  | 4,500
Electrical infrastructure | 131,176 |  | 131,010
Non-oil and natural gas equipment | 13,458 |  | 26,809
Buildings and structures | 77,148 |  | 79,548
Total | 226,182 |  | 241,867
Less accumulated depreciation and amortization | (25,344) |  | (15,886)
Other property, plant and equipment, net | 200,838 |  | 225,981
Total property, plant and equipment, net | $ | 949,949 |  | $ | 923,240
Capitalized Costs of Unproved Properties Excluded from Amortization | The following table summarizes the costs, by year incurred, related to unproved properties, which were excluded from oil and natural gas properties subject to amortization at December 31, 2018 (in thousands):
|  |  | Year Cost Incurred |  |  |  |  |  |
| Total |  | 2018 |  | 2017 |  | 2016 |  | 2015 and Prior
Property acquisition | $ | 59,522 |  | $ | 3,859 |  | $ | 20,647 |  | $ | 13,735 |  | $ | 21,281
Exploration | 630 |  | 13 |  | 323 |  | 243 |  | 51
Total costs incurred | $ | 60,152 |  | $ | 3,872 |  | $ | 20,970 |  | $ | 13,978 |  | $ | 21,332

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- Definition Tabular disclosure of physical assets used in the normal conduct of business and not intended for resale. Includes, but is not limited to, balances by class of assets, depreciation and depletion expense and method used, including composite depreciation, and accumulated deprecation. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02(13)) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 360 -SubTopic 10 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6391035&loc=d3e2868-110229 + Details
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- Definition Tabular disclosure of the capitalized costs of unproved properties and major development projects that are excluded from capitalized costs being amortized. This includes the total costs excluded and, at a minimum, these categories of costs: acquisition costs, exploration costs, development costs in the case of significant development projects, and capitalized interest. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 932 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.4-10(a)(32)) -URI http://asc.fasb.org/extlink&oid=82851474&loc=d3e511914-122862 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 932 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.4-10(c)(7)(ii)) -URI http://asc.fasb.org/extlink&oid=82851474&loc=d3e511914-122862 + Details
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