XML 73 R43.htm IDEA: XBRL DOCUMENT
v3.20.4

Acquisitions and Dispositions of Oil and Gas Properties - Additional Information (Detail) $ in Thousands, shares in Millions |  |  |  |  |  | 1 Months Ended | 5 Months Ended | 7 Months Ended | 12 Months Ended |  |
--- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | ---
Nov. 01, 2019 a well shares | Dec. 19, 2018 USD ($) a | Sep. 21, 2018 USD ($) | Aug. 14, 2018 USD ($) | Jul. 31, 2018 USD ($) a well | Apr. 30, 2018 USD ($) | Dec. 31, 2018 USD ($) | Aug. 13, 2018 USD ($) | Dec. 31, 2020 USD ($) acres | Dec. 31, 2019 USD ($) | Sep. 30, 2020 USD ($) | Jul. 16, 2019 USD ($) a well
Business Acquisition [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Property acquisitions | $ |  |  |  |  |  |  | $ 21,013 | $ 39,323 | $ 0 | $ 2,097,451 |  |
Working interests re-acquired under the joint venture | $ |  |  |  | $ 17,900 |  |  |  |  |  |  |  |
Proceeds from sale of undeveloped acreage | $ |  |  | $ 13,700 |  |  |  |  |  |  |  |  |
Covey Park Acquisition |  |  |  |  |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Oil and gas properties, gross acres | a |  |  |  |  |  |  |  |  |  |  |  | 317,142
Oil and gas properties, net acres | a |  |  |  |  |  |  |  |  |  |  |  | 248,196
Producing natural gas wells, gross |  |  |  |  |  |  |  |  |  |  |  | 1,230
Producing natural gas wells, net |  |  |  |  |  |  |  |  |  |  |  | 712.0
Producing Haynesville shale natural gas wells, gross |  |  |  |  |  |  |  |  |  |  |  | 844
Producing Haynesville shale natural gas wells, net |  |  |  |  |  |  |  |  |  |  |  | 383.0
Merger value | $ |  |  |  |  |  |  |  |  |  |  | $ 2,225,608 | $ 2,226,682
Privately Held Company |  |  |  |  |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Oil and gas properties, gross acres | a | 7,702 |  |  |  |  |  |  |  |  |  |  |
Oil and gas properties, net acres | a | 3,155 |  |  |  |  |  |  |  |  |  |  |
Producing natural gas wells, gross | 75 |  |  |  |  |  |  |  |  |  |  |
Producing natural gas wells, net | 20.1 |  |  |  |  |  |  |  |  |  |  |
Producing Haynesville shale natural gas wells, gross | 36 |  |  |  |  |  |  |  |  |  |  |
Producing Haynesville shale natural gas wells, net | 11.7 |  |  |  |  |  |  |  |  |  |  |
Privately Held Company | Common Stock |  |  |  |  |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Shares issued as consideration | shares | 4.5 |  |  |  |  |  |  |  |  |  |  |
North Louisiana and Texas Properties |  |  |  |  |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Property acquisitions | $ |  |  |  |  | $ 41,500 |  |  |  |  |  |  |
Oil and gas properties, gross acres | a |  |  |  |  | 22,559 |  |  |  |  |  |  |
Oil and gas properties, net acres | a |  |  |  |  | 12,085 |  |  |  |  |  |  |
Producing natural gas wells, gross |  |  |  |  | 114 |  |  |  |  |  |  |
Producing natural gas wells, net |  |  |  |  | 27.8 |  |  |  |  |  |  |
Producing Haynesville shale natural gas wells, gross |  |  |  |  | 47 |  |  |  |  |  |  |
Producing Haynesville shale natural gas wells, net |  |  |  |  | 14.6 |  |  |  |  |  |  |
Harrison and Panola Counties, Texas |  |  |  |  |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Oil and gas properties, net acres | a |  | 5,301 |  |  |  |  |  |  |  |  |  |
Amount payable on acquisition of interest in Haynesville shale rights | $ |  | $ 20,500 |  |  |  |  |  |  |  |  |  |
Payment term for acquisition of interest in Haynesville shale rights |  | 4 years |  |  |  |  |  |  |  |  |  |
Percentage of interest provided in each well drilled by company |  | 12.00% |  |  |  |  |  |  |  |  |  |
South Texas Sold Properties |  |  |  |  |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Gross proceeds from sale of oil and gas properties | $ |  |  |  |  |  | $ 106,400 |  |  |  |  |  |
South Texas Asset Held for Sale |  |  |  |  |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Loss on sale of oil and gas properties | $ |  |  |  |  |  |  |  | $ 32,700 |  |  |  |
Oil and Gas Properties |  |  |  |  |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Number of acres leased | acres |  |  |  |  |  |  |  |  | 13,519 |  |  |
Total lease cost | $ |  |  |  |  |  |  |  |  | $ 7,900 |  |  |

X
- Definition Acquisition of prospective for gas gross acres. + References No definition available. + Details
Name: | crk_AcquisitionOfProspectiveForGasGrossAcres
Namespace Prefix: | crk_
Data Type: | num:areaItemType
Balance Type: | na
Period Type: | instant

X
- Definition Acquisition of prospective for gas net acres. + References No definition available. + Details
Name: | crk_AcquisitionOfProspectiveForGasNetAcres
Namespace Prefix: | crk_
Data Type: | num:areaItemType
Balance Type: | na
Period Type: | instant

X
- Definition Amount payable on acquisition of interest. + References No definition available. + Details
Name: | crk_AmountPayableOnAcquisitionOfInterest
Namespace Prefix: | crk_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Gross proceeds from sale of oil and gas properties. + References No definition available. + Details
Name: | crk_GrossProceedsFromSaleOfOilAndGasProperties
Namespace Prefix: | crk_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Haynesville shale wells producing on purchased property gross. + References No definition available. + Details
Name: | crk_HaynesvilleShaleWellsProducingOnPurchasedPropertyGross
Namespace Prefix: | crk_
Data Type: | xbrli:decimalItemType
Balance Type: | na
Period Type: | instant

X
- Definition Haynesville shale wells producing on purchased property net. + References No definition available. + Details
Name: | crk_HaynesvilleShaleWellsProducingOnPurchasedPropertyNet
Namespace Prefix: | crk_
Data Type: | xbrli:decimalItemType
Balance Type: | na
Period Type: | instant

X
- Definition Operating Lease, Number of Acres Leased + References No definition available. + Details
Name: | crk_OperatingLeaseNumberOfAcresLeased
Namespace Prefix: | crk_
Data Type: | xbrli:integerItemType
Balance Type: | na
Period Type: | duration

X
- Definition Payment term for acquisition of interest. + References No definition available. + Details
Name: | crk_PaymentTermForAcquisitionOfInterest
Namespace Prefix: | crk_
Data Type: | xbrli:durationItemType
Balance Type: | na
Period Type: | duration

X
- Definition Percentage of interest provided per drilled well. + References No definition available. + Details
Name: | crk_PercentageOfInterestProvidedPerDrilledWell
Namespace Prefix: | crk_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | duration

X
- Definition Proceeds from sale of undeveloped acreage. + References No definition available. + Details
Name: | crk_ProceedsFromSaleOfUndevelopedAcreage
Namespace Prefix: | crk_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Wells producing on purchased property gross. + References No definition available. + Details
Name: | crk_WellsProducingOnPurchasedPropertyGross
Namespace Prefix: | crk_
Data Type: | xbrli:decimalItemType
Balance Type: | na
Period Type: | instant

X
- Definition Wells producing on purchased property net. + References No definition available. + Details
Name: | crk_WellsProducingOnPurchasedPropertyNet
Namespace Prefix: | crk_
Data Type: | xbrli:decimalItemType
Balance Type: | na
Period Type: | instant

X
- Definition Working interests re-acquired under joint venture. + References No definition available. + Details
Name: | crk_WorkingInterestsReacquiredUnderJointVenture
Namespace Prefix: | crk_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- 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
Name: | us-gaap_BusinessAcquisitionLineItems
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Amount of assets acquired at the acquisition date. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 805 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=121647850&loc=d3e4845-128472 + Details
Name: | us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedAssets
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Cost incurred, including capitalized costs and costs charged to expense, in acquisition of oil and gas properties. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 932 -SubTopic 235 -Section 50 -Paragraph 18 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=68064819&loc=d3e62014-109447 + Details
Name: | us-gaap_CostsIncurredAcquisitionOfOilAndGasProperties
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Amount of gain (loss) on sale or disposal of proven and unproven oil and gas properties. + 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
Name: | us-gaap_GainLossOnSaleOfOilAndGasProperty
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition The number of shares issued as [noncash or part noncash] consideration for a business or asset acquired. Noncash is defined as transactions during a period that affect recognized assets or liabilities but that do not result in cash receipts or cash payments in the period. "Part noncash" refers to that portion of the transaction not resulting in cash receipts or cash payments in the period. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 50 -Paragraph 3 -URI http://asc.fasb.org/extlink&oid=121583591&loc=d3e4304-108586 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 50 -Paragraph 5 -URI http://asc.fasb.org/extlink&oid=121583591&loc=d3e4332-108586 Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 50 -Paragraph 4 -URI http://asc.fasb.org/extlink&oid=121583591&loc=d3e4313-108586 + Details
Name: | us-gaap_NoncashOrPartNoncashAcquisitionNoncashFinancialOrEquityInstrumentConsiderationSharesIssued1
Namespace Prefix: | us-gaap_
Data Type: | xbrli:sharesItemType
Balance Type: | na
Period Type: | duration

X
- Definition Amount of operating lease expense. Excludes sublease income. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 842 -SubTopic 20 -Section 45 -Paragraph 4 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=121603541&loc=SL77918638-209977 + Details
Name: | us-gaap_OperatingLeaseExpense
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Details
Name: | us-gaap_BusinessAcquisitionAxis=crk_CoveyParkEnergyLLCMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_BusinessAcquisitionAxis=crk_PrivatelyHeldCompanyMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_StatementClassOfStockAxis=us-gaap_CommonStockMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | srt_StatementGeographicalAxis=crk_NorthLouisianaAndTexasPropertiesMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | srt_StatementGeographicalAxis=crk_HarrisonAndPanolaCountiesTexasMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperationsAxis=crk_SouthTexasSoldPropertiesMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_PropertyPlantAndEquipmentByTypeAxis=crk_SouthTexasAssetsHeldForSaleMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_PropertyPlantAndEquipmentByTypeAxis=us-gaap_OilAndGasPropertiesMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |