Commitments and Contingencies - Additional Information (Detail) $ in Millions	6 Months Ended
Jun. 30, 2016 USD ($)
Commitments And Contingencies Disclosure [Abstract]
Natural gas transportation and treating agreements	through July 2019
Maximum commitments under natural gas transportation and treating agreements	$ 5.3

Maximum commitments under natural gas transportation agreements.

No definition available.

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