SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES - Weighted Average Shares of Unvested Restricted Stock (Detail) - shares shares in Thousands	3 Months Ended	6 Months Ended
Jun. 30, 2025	Jun. 30, 2024	Jun. 30, 2025	Jun. 30, 2024
Accounting Policies [Abstract]
Unvested restricted stock (in shares)	2,342	2,550	2,330	2,283

Share based compensation arrangement by share based payment award equity instruments other than option nonvested weighted average number.

No definition available.

Name:	crk_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionNonvestedWeightedAverageNumber
Namespace Prefix:	crk_
Data Type:	xbrli:sharesItemType
Balance Type:	na
Period Type:	duration