XML 45 R34.htm IDEA: XBRL DOCUMENT
v3.10.0.1

Long-Term Debt - Additional Information (Detail) | 6 Months Ended
--- | ---
Jun. 30, 2018 USD ($) Day $ / shares | Jun. 30, 2017 USD ($) shares
Debt Instrument [Line Items] |  |
Interest rate on senior notes, payment in kind | 12.25% |
Additional notes outstanding | $ 91,900,000 |
10% Senior Secured Toggle Notes due 2020 |  |
Debt Instrument [Line Items] |  |
Interest payment terms | payable on March 15 and September 15 |
Maturity of senior notes | Mar. 15, 2020 |
Accrued interest by issuing additional notes | $ 75,000,000 |
Interest rate on senior notes | 10.00% |
10% Senior Notes due 2020 |  |
Debt Instrument [Line Items] |  |
Interest payment terms | payable on March 15 and September 15 |
Maturity of senior notes | Mar. 15, 2020 |
Interest rate on senior notes | 10.00% |
7¾% Convertible Second Lien PIK Notes due 2019 |  |
Debt Instrument [Line Items] |  |
Interest payment terms | payable on April 1 and October 1 |
Maturity of senior notes | Apr. 01, 2019 |
Interest rate on senior notes | 7.75% |
7¾% Senior Notes due 2019 |  |
Debt Instrument [Line Items] |  |
Interest payment terms | payable on April 1 and October 1 |
Maturity of senior notes | Apr. 01, 2019 |
Interest rate on senior notes | 7.75% |
9½% Convertible Second Lien PIK Notes due 2020 |  |
Debt Instrument [Line Items] |  |
Interest payment terms | payable on June 15 and December 15 |
Maturity of senior notes | Jun. 15, 2020 |
Interest rate on senior notes | 9.50% |
Convertible Second Lien PIK Notes |  |
Debt Instrument [Line Items] |  |
Debt instrument convertible conversion ratio | 0.0812 |
Debt instrument convertible threshold consecutive trading days period | Day | 15 |
Convertible Second Lien PIK Notes | Minimum |  |
Debt Instrument [Line Items] |  |
Daily volume weighted average price | $ / shares | $ 12.32 |
Converted Notes |  |
Debt Instrument [Line Items] |  |
Debt instrument, principal amount and accrued interest |  | $ 9,900,000
Common stock shares exchanged for repayment of principal amount | shares |  | 826,327
9½% Senior Notes due 2020 |  |
Debt Instrument [Line Items] |  |
Interest payment terms | payable on June 15 and December 15 |
Maturity of senior notes | Jun. 15, 2020 |
Interest rate on senior notes | 9.50% |

X
- Definition Daily volume weighted average price. + References No definition available. + Details
Name: | crk_DailyVolumeWeightedAveragePrice
Namespace Prefix: | crk_
Data Type: | num:perShareItemType
Balance Type: | na
Period Type: | duration

X
- Definition Debt conversion principal amount plus accrued interest. + References No definition available. + Details
Name: | crk_DebtConversionPrincipalAmountPlusAccruedInterest
Namespace Prefix: | crk_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition Debt instrument, interest rate, payment in kind. + References No definition available. + Details
Name: | crk_DebtInstrumentInterestRatePaymentInKind
Namespace Prefix: | crk_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | duration

X
- Definition Maximum accrued interest payable in kind. + References No definition available. + Details
Name: | crk_MaximumAccruedInterestPayableInKind
Namespace Prefix: | crk_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition Maximum notes issuable for toggle interest paid in kind. + References No definition available. + Details
Name: | crk_MaximumNotesIssuableForToggleInterestPaidInKind
Namespace Prefix: | crk_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition The number of shares issued in exchange for the original debt being converted in a noncash (or part noncash) transaction. "Part noncash" refers to that portion of the transaction not resulting in cash receipts or 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 5 -URI http://asc.fasb.org/extlink&oid=98513485&loc=d3e4332-108586 Reference 2: 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=98513485&loc=d3e4304-108586 + Details
Name: | us-gaap_DebtConversionConvertedInstrumentSharesIssued1
Namespace Prefix: | us-gaap_
Data Type: | xbrli:sharesItemType
Balance Type: | na
Period Type: | duration

X
- Definition Ratio applied to the conversion of debt instrument into equity with equity shares divided by debt principal amount. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 505 -SubTopic 10 -Section 50 -Paragraph 7 -URI http://asc.fasb.org/extlink&oid=109259400&loc=d3e21521-112644 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 505 -SubTopic 10 -Section 50 -Paragraph 6 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=109259400&loc=d3e21506-112644 Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.22(a)(5)) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 Reference 4: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 505 -SubTopic 10 -Section 50 -Paragraph 3 -URI http://asc.fasb.org/extlink&oid=109259400&loc=d3e21475-112644 + Details
Name: | us-gaap_DebtInstrumentConvertibleConversionRatio1
Namespace Prefix: | us-gaap_
Data Type: | xbrli:pureItemType
Balance Type: | na
Period Type: | duration

X
- Definition Threshold period of specified consecutive trading days within which common stock price to conversion price of convertible debt instrument must exceed threshold percentage for specified number of trading days to trigger conversion feature. + References No definition available. + Details
Name: | us-gaap_DebtInstrumentConvertibleThresholdConsecutiveTradingDays1
Namespace Prefix: | us-gaap_
Data Type: | xbrli:integerItemType
Balance Type: | na
Period Type: | duration

X
- Definition Contractual interest rate for funds borrowed, under the debt agreement. + 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 210.5-02.22(a)(1)) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 + Details
Name: | us-gaap_DebtInstrumentInterestRateStatedPercentage
Namespace Prefix: | us-gaap_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | instant

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_DebtInstrumentLineItems
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Date when the debt instrument is scheduled to be fully repaid, in CCYY-MM-DD format. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.22(a)(2)) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 Reference 2: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 820 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (bbb)(2) -URI http://asc.fasb.org/extlink&oid=99377789&loc=d3e19207-110258 + Details
Name: | us-gaap_DebtInstrumentMaturityDate
Namespace Prefix: | us-gaap_
Data Type: | xbrli:dateItemType
Balance Type: | na
Period Type: | duration

X
- Definition Description of the payment terms of the debt instrument (for example, whether periodic payments include principal and frequency of payments) and discussion about any contingencies associated with the payment. + 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 210.5-02.22(a)(3)) -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 942 -SubTopic 470 -Section 50 -Paragraph 3 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=75038535&loc=d3e64711-112823 + Details
Name: | us-gaap_DebtInstrumentPaymentTerms
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Details
Name: | us-gaap_DebtInstrumentAxis=crk_SeniorSecuredToggleNotesTenPercentDueTwoThousandTwentyMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_DebtInstrumentAxis=crk_SeniorNotesTenPercentDueTwoThousandTwentyMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_DebtInstrumentAxis=crk_ConvertibleSecondLienPaymentInKindNotesSevenPointSevenFivePercentDueTwoThousandNineteenMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_DebtInstrumentAxis=crk_SeniorNotesSevenPointSevenFivePercentDueTwoThousandNineteenMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_DebtInstrumentAxis=crk_ConvertibleSecondLienPaymentInKindNotesNinePointFivePercentDueTwoThousandTwentyMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_DebtInstrumentAxis=crk_ConvertibleSecondLienPaymentInKindNotesMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | srt_RangeAxis=srt_MinimumMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_DebtInstrumentAxis=crk_ConvertedNotesMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_DebtInstrumentAxis=crk_SeniorNotesNinePointFivePercentDueTwoThousandTwentyMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |