XML 56 R53.htm IDEA: XBRL DOCUMENT v2.4.1.9

Long-term Debt - Additional Information (Detail) (Bank credit facility, USD $)	12 Months Ended
	Dec. 31, 2014
Debt Instrument [Line Items]
Bank credit facility	$ 1,000,000,000us-gaap_LineOfCreditFacilityMaximumBorrowingCapacity
Line of credit facility commitment term (in years)	5 years
Maturity of credit facility	Nov. 22, 2018
Borrowing base	675,000,000crk_BorrowingBase
Availability of borrowing base	300,000,000us-gaap_LineOfCreditFacilityCurrentBorrowingCapacity
Stated percentage over federal funds rate to calculate base rate	0.50%crk_StatedPercentageOverFederalFundsRateToCalculateBaseRate
Stated percentage over 30 day LIBOR to calculate base rate	1.00%crk_StatedPercentageOverThirtyDaysLiborToCalculateBaseRate
Minimum spread rate over base rate for interest rate on credit facility	0.50%crk_MinimumSpreadRateOverBaseRateForInterestRateOnCreditFacility
Maximum spread rate over base rate for interest rate on credit facility	1.50%crk_MaximumSpreadRateOverBaseRateForInterestRateOnCreditFacility
Maximum annual amount of cash dividends and stock repurchases without restriction under credit facility	$ 120,000,000crk_MaximumAnnualAmountOfCashDividendsAndStockRepurchasesWithoutRestrictionUnderCreditFacility
Minimum
Debt Instrument [Line Items]
Spread rate over LIBOR for interest rate on credit facility	1.50%us-gaap_DebtInstrumentBasisSpreadOnVariableRate1 / us-gaap_LongtermDebtTypeAxis = us-gaap_LineOfCreditMember / us-gaap_RangeAxis = us-gaap_MinimumMember
Commitment fee on unused borrowing base	0.375%us-gaap_LineOfCreditFacilityUnusedCapacityCommitmentFeePercentage / us-gaap_LongtermDebtTypeAxis = us-gaap_LineOfCreditMember / us-gaap_RangeAxis = us-gaap_MinimumMember
Interest coverage ratio	250.00%crk_InterestCoverageRatio / us-gaap_LongtermDebtTypeAxis = us-gaap_LineOfCreditMember / us-gaap_RangeAxis = us-gaap_MinimumMember
Maximum
Debt Instrument [Line Items]
Spread rate over LIBOR for interest rate on credit facility	2.50%us-gaap_DebtInstrumentBasisSpreadOnVariableRate1 / us-gaap_LongtermDebtTypeAxis = us-gaap_LineOfCreditMember / us-gaap_RangeAxis = us-gaap_MaximumMember
Commitment fee on unused borrowing base	0.50%us-gaap_LineOfCreditFacilityUnusedCapacityCommitmentFeePercentage / us-gaap_LongtermDebtTypeAxis = us-gaap_LineOfCreditMember / us-gaap_RangeAxis = us-gaap_MaximumMember
Leverage ratio	400.00%crk_LeverageRatio / us-gaap_LongtermDebtTypeAxis = us-gaap_LineOfCreditMember / us-gaap_RangeAxis = us-gaap_MaximumMember
Amended leverage ratio for year 2015	500.00%crk_AmendedLeverageRatio / us-gaap_LongtermDebtTypeAxis = us-gaap_LineOfCreditMember / us-gaap_RangeAxis = us-gaap_MaximumMember

X

- Definition

Amended leverage ratio.

+ References

No definition available.

+ Details

Name:	crk_AmendedLeverageRatio
Namespace Prefix:	crk_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

X

- Definition

Borrowing base.

+ References

No definition available.

+ Details

Name:	crk_BorrowingBase
Namespace Prefix:	crk_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

X

- Definition

Interest coverage ratio.

+ References

No definition available.

+ Details

Name:	crk_InterestCoverageRatio
Namespace Prefix:	crk_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

X

- Definition

Leverage ratio.

+ References

No definition available.

+ Details

Name:	crk_LeverageRatio
Namespace Prefix:	crk_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

X

- Definition

Line of credit facility commitment term.

+ References

No definition available.

+ Details

Name:	crk_LineOfCreditFacilityCommitmentTerm
Namespace Prefix:	crk_
Data Type:	xbrli:durationItemType
Balance Type:	na
Period Type:	duration

X

- Definition

Maximum annual amount of cash dividends and stock repurchases without restriction under credit facility.

+ References

No definition available.

+ Details

Name:	crk_MaximumAnnualAmountOfCashDividendsAndStockRepurchasesWithoutRestrictionUnderCreditFacility
Namespace Prefix:	crk_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

X

- Definition

Maximum spread rate over base rate for interest rate on credit facility.

+ References

No definition available.

+ Details

Name:	crk_MaximumSpreadRateOverBaseRateForInterestRateOnCreditFacility
Namespace Prefix:	crk_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	instant

X

- Definition

Minimum spread rate over base rate for interest rate on credit facility.

+ References

No definition available.

+ Details

Name:	crk_MinimumSpreadRateOverBaseRateForInterestRateOnCreditFacility
Namespace Prefix:	crk_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	instant

X

- Definition

Stated percentage over federal funds rate to calculate base rate.

+ References

No definition available.

+ Details

Name:	crk_StatedPercentageOverFederalFundsRateToCalculateBaseRate
Namespace Prefix:	crk_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	instant

X

- Definition

Stated percentage over thirty days Libor to calculate base rate.

+ References

No definition available.

+ Details

Name:	crk_StatedPercentageOverThirtyDaysLiborToCalculateBaseRate
Namespace Prefix:	crk_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	instant

X

- Definition

Percentage points added to the reference rate to compute the variable rate on the debt instrument.

+ References

No definition available.

+ Details

Name:	us-gaap_DebtInstrumentBasisSpreadOnVariableRate1
Namespace Prefix:	us-gaap_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

X

- Details

Name:	us-gaap_DebtInstrumentLineItems
Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

X

- Definition

Amount of current borrowing capacity under the credit facility considering any current restrictions on the amount that could be borrowed (for example, borrowings may be limited by the amount of current assets), but without considering any amounts currently outstanding under the facility.

+ 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 210.5-02.19(b),22(b))

-URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682



Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

-Section 02

-Paragraph 19, 22

-Article 5

+ Details

Name:	us-gaap_LineOfCreditFacilityCurrentBorrowingCapacity
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

X

- Definition

Date the credit facility terminates, in CCYY-MM-DD format.

+ 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 210.5-02.19(b),22(b))

-URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682



Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

-Section 02

-Paragraph 19, 22

-Article 5

+ Details

Name:	us-gaap_LineOfCreditFacilityExpirationDate1
Namespace Prefix:	us-gaap_
Data Type:	xbrli:dateItemType
Balance Type:	na
Period Type:	duration

X

- Definition

Maximum borrowing capacity under the credit facility without consideration of any current restrictions on the amount that could be borrowed or the amounts currently outstanding under the facility.

+ 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 210.5-02.19(b),22(b))

-URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682



Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

-Section 02

-Paragraph 19, 22

-Article 5

+ Details

Name:	us-gaap_LineOfCreditFacilityMaximumBorrowingCapacity
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

X

- Definition

The fee, expressed as a percentage of the line of credit facility, for available but unused credit capacity under the credit facility.

+ References

No definition available.

+ Details

Name:	us-gaap_LineOfCreditFacilityUnusedCapacityCommitmentFeePercentage
Namespace Prefix:	us-gaap_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

X

- Details

Name:	us-gaap_RangeAxis=us-gaap_MaximumMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_RangeAxis=us-gaap_MinimumMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type: