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Property, Plant and Equipment - Schedule of Property, Plant and Equipment (Detail) - USD ($) $ in Thousands | 12 Months Ended |
--- | --- | ---
Dec. 31, 2015 | Dec. 31, 2014
Property Plant And Equipment [Line Items] |  |
Property, plant and equipment, gross | $ 1,200,207 | $ 736,610
Less accumulated depreciation, depletion and amortization | 221,498 | 148,486
Property, plant and equipment, net | 978,709 | 588,124
Machinery, Equipment and Automotive [Member] |  |
Property Plant And Equipment [Line Items] |  |
Property, plant and equipment, gross | $ 540,315 | 311,920
Machinery, Equipment and Automotive [Member] | Minimum [Member] |  |
Property Plant And Equipment [Line Items] |  |
Useful lives in years | 3 years |
Machinery, Equipment and Automotive [Member] | Maximum [Member] |  |
Property Plant And Equipment [Line Items] |  |
Useful lives in years | 30 years |
Proved Natural Gas Properties [Member] |  |
Property Plant And Equipment [Line Items] |  |
Property, plant and equipment, gross | $ 76,277 | 72,529
Buildings and Improvements [Member] |  |
Property Plant And Equipment [Line Items] |  |
Property, plant and equipment, gross | $ 40,372 | 34,022
Buildings and Improvements [Member] | Minimum [Member] |  |
Property Plant And Equipment [Line Items] |  |
Useful lives in years | 10 years |
Buildings and Improvements [Member] | Maximum [Member] |  |
Property Plant And Equipment [Line Items] |  |
Useful lives in years | 30 years |
Furniture, Fixtures and Store Equipment [Member] |  |
Property Plant And Equipment [Line Items] |  |
Property, plant and equipment, gross | $ 2,409 | 2,294
Furniture, Fixtures and Store Equipment [Member] | Minimum [Member] |  |
Property Plant And Equipment [Line Items] |  |
Useful lives in years | 3 years |
Furniture, Fixtures and Store Equipment [Member] | Maximum [Member] |  |
Property Plant And Equipment [Line Items] |  |
Useful lives in years | 10 years |
Assets Under Capital Leases [Member] |  |
Property Plant And Equipment [Line Items] |  |
Useful lives in years | 3 years |
Property, plant and equipment, gross | $ 425 | 240
Land Improvements [Member] |  |
Property Plant And Equipment [Line Items] |  |
Property, plant and equipment, gross | $ 7,183 | 6,875
Land Improvements [Member] | Minimum [Member] |  |
Property Plant And Equipment [Line Items] |  |
Useful lives in years | 10 years |
Land Improvements [Member] | Maximum [Member] |  |
Property Plant And Equipment [Line Items] |  |
Useful lives in years | 40 years |
Construction in Progress [Member] |  |
Property Plant And Equipment [Line Items] |  |
Property, plant and equipment, gross | $ 506,205 | 291,034
Capital Spare Parts [Member] |  |
Property Plant And Equipment [Line Items] |  |
Property, plant and equipment, gross | 18,047 | 8,722
Land [Member] |  |
Property Plant And Equipment [Line Items] |  |
Property, plant and equipment, gross | $ 8,974 | $ 8,974

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- Definition Amount of accumulated depreciation, depletion and amortization for physical assets used in the normal conduct of business to produce goods and services. + 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 (c) -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 S99 -Paragraph 1 -Subparagraph (SX 210.5-02.14) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 + Details
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- Definition Amount before accumulated depreciation, depletion and amortization of physical assets used in the normal conduct of business and not intended for resale. Examples include, but are not limited to, land, buildings, machinery and equipment, office equipment, and furniture and fixtures. + 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 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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- Definition Amount after accumulated depreciation, depletion and amortization of physical assets used in the normal conduct of business to produce goods and services and not intended for resale. Examples include, but are not limited to, land, buildings, machinery and equipment, office equipment, and furniture and fixtures. + References Reference 1: 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 Reference 2: http://www.xbrl.org/2003/role/presentationRef -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 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 02 -Paragraph 13 -Subparagraph a -Article 5 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 03 -Paragraph 8 -Article 7 + Details
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- Definition Useful life of long lived, physical assets used in the normal conduct of business and not intended for resale, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days. Examples include, but not limited to, land, buildings, machinery and equipment, office equipment, furniture and fixtures, and computer equipment. + References No definition available. + Details
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