v3.7.0.1
Document and Entity Information - shares
3 Months Ended
Mar. 31, 2017
May 01, 2017
Document And Entity Information [Abstract]    
Document Type 10-Q  
Amendment Flag false  
Document Period End Date Mar. 31, 2017  
Document Fiscal Year Focus 2017  
Document Fiscal Period Focus Q1  
Trading Symbol WTI  
Entity Registrant Name W&T OFFSHORE INC  
Entity Central Index Key 0001288403  
Current Fiscal Year End Date --12-31  
Entity Filer Category Accelerated Filer  
Entity Common Stock, Shares Outstanding   137,674,372