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v2.4.1.9

Property, Plant and Equipment (Details) (USD $) In Thousands, unless otherwise specified | Dec. 31, 2014 | Dec. 31, 2013 | Dec. 31, 2012
--- | --- | --- | ---
Oil and natural gas properties |  |  |  |  |
Proved | $ 11,707,147 us-gaap_CapitalizedCostsProvedProperties | [1] | $ 10,972,816 us-gaap_CapitalizedCostsProvedProperties | [1] | $ 12,262,921 us-gaap_CapitalizedCostsProvedProperties
Unproved | 290,596 us-gaap_CapitalizedCostsOfUnprovedPropertiesExcludedFromAmortizationCumulative |  | 531,606 us-gaap_CapitalizedCostsOfUnprovedPropertiesExcludedFromAmortizationCumulative |  | 865,863 us-gaap_CapitalizedCostsOfUnprovedPropertiesExcludedFromAmortizationCumulative
Total oil and natural gas properties | 11,997,743 us-gaap_OilAndGasPropertyFullCostMethodGross |  | 11,504,422 us-gaap_OilAndGasPropertyFullCostMethodGross |  | 13,128,784 us-gaap_OilAndGasPropertyFullCostMethodGross
Less: accumulated depreciation, depletion and impairment | (6,359,149)us-gaap_CapitalizedCostsAccumulatedDepreciationDepletionAmortizationAndValuationAllowanceForRelatingToOilAndGasProducingActivities |  | (5,762,969)us-gaap_CapitalizedCostsAccumulatedDepreciationDepletionAmortizationAndValuationAllowanceForRelatingToOilAndGasProducingActivities |  | (5,231,182)us-gaap_CapitalizedCostsAccumulatedDepreciationDepletionAmortizationAndValuationAllowanceForRelatingToOilAndGasProducingActivities
Net oil and natural gas properties capitalized costs | 5,638,594 us-gaap_OilAndGasPropertyFullCostMethodNet |  | 5,741,453 us-gaap_OilAndGasPropertyFullCostMethodNet |  | 7,897,602 us-gaap_OilAndGasPropertyFullCostMethodNet
Land | 16,300 us-gaap_Land |  | 18,423 us-gaap_Land |  |
Non-oil and natural gas equipment | 602,392 us-gaap_MachineryAndEquipmentGross | [2] | 600,603 us-gaap_MachineryAndEquipmentGross | [2] |
Buildings and structures | 263,191 us-gaap_BuildingsAndImprovementsGross | [3] | 233,405 us-gaap_BuildingsAndImprovementsGross | [3] |
Total | 881,883 us-gaap_PropertyPlantAndEquipmentGross |  | 852,431 us-gaap_PropertyPlantAndEquipmentGross |  |
Less accumulated depreciation and amortization | (305,420)us-gaap_AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment |  | (286,209)us-gaap_AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment |  |
Other property, plant and equipment, net | 576,463 us-gaap_PropertyPlantAndEquipmentNet |  | 566,222 us-gaap_PropertyPlantAndEquipmentNet |  |
Total property, plant and equipment, net | $ 6,215,057 sd_TotalPropertyAndEquipmentNet |  | $ 6,307,675 sd_TotalPropertyAndEquipmentNet |  |
[1] | Includes cumulative capitalized interest of approximately $38.1 million and $23.4 million at December 31, 2014 and 2013, respectively.
[2] | Includes cumulative capitalized interest of approximately $4.3 million at both December 31, 2014 and 2013.
[3] | Includes cumulative capitalized interest of approximately $17.1 million and $12.0 million at December 31, 2014 and 2013, respectively.

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- Definition Amount before accumulated depreciation of building structures held for productive use including addition, improvement, or renovation to the structure, including, but not limited to, interior masonry, interior flooring, electrical, and plumbing. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 360 -SubTopic 10 -Section 50 -Paragraph 1 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=6391035&loc=d3e2868-110229 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section 45 -Paragraph 4 -Subparagraph (f) -URI http://asc.fasb.org/extlink&oid=28358313&loc=d3e6812-107765 + Details
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- Definition Amount of accumulated depreciation, depletion, amortization and valuation allowance relating to oil and gas producing activities. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 932 -SubTopic 235 -Section 50 -Paragraph 13 -URI http://asc.fasb.org/extlink&oid=8451039&loc=d3e61901-109447 + Details
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- Definition The sum of the capitalized costs incurred, as of the balance sheet date, of unproved properties excluded from amortization including acquisition costs, exploration costs, development costs, and production costs. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -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=27015464&loc=d3e511914-122862 + Details
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- Definition Capitalized costs of proved properties incurred for any combination mineral interests acquisitions; wells and related equipment; support equipment and facilities; and uncompleted wells and equipment and other costs not previously disclosed within this table. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 932 -SubTopic 235 -Section 50 -Paragraph 13 -URI http://asc.fasb.org/extlink&oid=8451039&loc=d3e61901-109447 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 932 -SubTopic 360 -Glossary Proved Properties -URI http://asc.fasb.org/extlink&oid=6522428 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Glossary Properties -URI http://asc.fasb.org/extlink&oid=21914647 + Details
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- Definition Amount before accumulated depletion of real estate held for productive use, excluding land held for sale. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section 45 -Paragraph 4 -Subparagraph (e) -URI http://asc.fasb.org/extlink&oid=28358313&loc=d3e6812-107765 Reference 2: http://www.xbrl.org/2003/role/presentationRef -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 + Details
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