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Leases - Additional Information (Detail) $ in Thousands | 3 Months Ended | 12 Months Ended
--- | --- | ---
Jun. 30, 2020 USD ($) | [1] | Dec. 31, 2019 USD ($) | Sep. 30, 2019 USD ($) | [2] | Dec. 31, 2020 USD ($) Facility OperatingEquipment | Dec. 31, 2019 USD ($) | Dec. 31, 2018 USD ($)
Lessee Lease Description [Line Items] |  |  |  |  |  |
Operating leasing arrangements initial term |  | 58 months |  |  | 58 months |
Proceeds from sale of facility |  | $ 10,200 |  |  |  |
Gain on sale of facility | $ 7,314 |  | $ 162,581 | $ 3,079 | $ 13,904 | $ 28,958
Right of use asset |  | 31,275 |  | 16,850 | $ 31,275 |
Operating lease liabilities |  |  |  | $ 26,214 |  |
New Facility Lease |  |  |  |  |  |
Lessee Lease Description [Line Items] |  |  |  |  |  |
Number of facility leases | Facility |  |  |  | 2 |  |
Right of use asset |  |  |  | $ 1,500 |  |
Operating lease liabilities |  |  |  | $ 1,500 |  |
Extended Facility Lease |  |  |  |  |  |
Lessee Lease Description [Line Items] |  |  |  |  |  |
Number of facility leases | Facility |  |  |  | 2 |  |
Right of use asset |  |  |  | $ 200 |  |
Operating lease liabilities |  |  |  | $ 200 |  |
Terminated Lease |  |  |  |  |  |
Lessee Lease Description [Line Items] |  |  |  |  |  |
Number of facility leases | Facility |  |  |  | 4 |  |
Right of use asset |  |  |  | $ 400 |  |
Operating lease liabilities |  |  |  | $ 2,200 |  |
Number of operating equipment leases | OperatingEquipment |  |  |  | 3 |  |
Other Operating Expenses (Income), Net |  |  |  |  |  |
Lessee Lease Description [Line Items] |  |  |  |  |  |
Gain on sale of facility |  | $ 800 |  |  |  |
Minimum |  |  |  |  |  |
Lessee Lease Description [Line Items] |  |  |  |  |  |
Operating leasing arrangements initial term |  |  |  | 1 year |  |
Leases remaining lease terms |  |  |  | 6 months |  |
Maximum |  |  |  |  |  |
Lessee Lease Description [Line Items] |  |  |  |  |  |
Leases remaining lease terms |  |  |  | 8 years |  |
[1] | Impairment of property and equipment related to Canadian drilling operations was included in “Depreciation, depletion, amortization and impairment” in the consolidated statements of operations.
[2] | Impairment of property and equipment was included in “Depreciation, depletion, amortization and impairment” in the consolidated statements of operations.

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- Definition Number of leased facilities. + References No definition available. + Details
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- Definition Number of operating equipment leases. + References No definition available. + Details
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- Definition Amount of gain (loss) on sale or disposal of property, plant and equipment assets, including oil and gas property and timber property. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 28 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=121586364&loc=d3e3602-108585 + Details
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- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. + References No definition available. + Details
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- Definition Remaining lease term of operating lease, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents reported fact of one year, five months, and thirteen days. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 842 -SubTopic 20 -Section 50 -Paragraph 3 -Subparagraph (a)(1) -URI http://asc.fasb.org/extlink&oid=121609121&loc=SL77918673-209980 + Details
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- Definition Amount of lessee's right to use underlying asset under operating lease. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 842 -SubTopic 20 -Section 45 -Paragraph 1 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=121603541&loc=SL77918627-209977 + Details
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