Annual report pursuant to Section 13 and 15(d)

Document And Entity Information

Document And Entity Information - USD ($)
12 Months Ended
Dec. 31, 2020
Feb. 28, 2021
Jun. 30, 2020
Document Information [Line Items]      
Entity Central Index Key 0001288403    
Entity Registrant Name W&T OFFSHORE INC    
Amendment Flag false    
Current Fiscal Year End Date --12-31    
Document Fiscal Period Focus FY    
Document Fiscal Year Focus 2020    
Document Type 10-K    
Document Annual Report true    
Document Period End Date Dec. 31, 2020    
Document Transition Report false    
Entity File Number 1-32414    
Entity Incorporation, State or Country Code TX    
Entity Tax Identification Number 72-1121985    
Entity Address, Address Line One 5718 Westheimer Road, Suite 700    
Entity Address, City or Town Houston    
Entity Address, State or Province TX    
Entity Address, Postal Zip Code 77057-5745    
City Area Code 713    
Local Phone Number 626-8525    
Title of 12(b) Security Common Stock, par value $0.00001    
Trading Symbol WTI    
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    
Entity Shell Company false    
Entity Public Float     $ 213,418,732
Entity Common Stock, Shares Outstanding   142,304,770