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SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES - Weighted Average Shares of Unvested Restricted Stock (Detail) - shares shares in Thousands | 3 Months Ended
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Mar. 31, 2022 | Mar. 31, 2021
Accounting Policies [Abstract] |  |
Unvested restricted stock (in shares) | 947 | 1,035

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- Definition Share based compensation arrangement by share based payment award equity instruments other than option nonvested weighted average number. + References No definition available. + Details
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Namespace Prefix: | crk_
Data Type: | xbrli:sharesItemType
Balance Type: | na
Period Type: | duration

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- References No definition available. + Details
Name: | us-gaap_AccountingPoliciesAbstract
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration