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Cover - USD ($)
$ in Millions
 12 Months Ended
Dec. 31, 2021
Feb. 16, 2022
Jun. 30, 2021
Cover [Abstract]      
Document Type 10-K    
Document Annual Report true    
Document Period End Date Dec. 31, 2021    
Current Fiscal Year End Date --12-31    
Document Transition Report false    
Entity File Number 001-03262    
Entity Registrant Name COMSTOCK RESOURCES, INC.    
Entity Incorporation, State or Country Code NV    
Entity Tax Identification Number 94-1667468    
Entity Address, Address Line One 5300 Town and Country Blvd.    
Entity Address, Address Line Two Suite 500    
Entity Address, City or Town Frisco    
Entity Address, State or Province TX    
Entity Address, Postal Zip Code 75034    
City Area Code 972    
Local Phone Number 668-8800    
Title of 12(b) Security Common Stock, par value $0.50 (per share)    
Trading Symbol CRK    
Security Exchange Name NYSE    
Entity Well-known Seasoned Issuer No    
Entity Voluntary Filers No    
Entity Current Reporting Status Yes    
Entity Interactive Data Current Yes    
Entity Filer Category Accelerated Filer    
Entity Small Business false    
Entity Emerging Growth Company false    
ICFR Auditor Attestation Flag true    
Entity Shell Company false    
Entity Public Float     $ 612.6
Entity Common Stock, Shares Outstanding   232,922,620  
Documents Incorporated by Reference
DOCUMENTS INCORPORATED BY REFERENCE
Portions of the Definitive Proxy Statement for the 2022 Annual Meeting of Stockholders
are incorporated by reference into Part III of this report.
    
Amendment Flag false    
Document Fiscal Year Focus 2021    
Document Fiscal Period Focus FY    
Entity Central Index Key 0000023194