v3.26.1
Document And Entity Information - shares
3 Months Ended
Mar. 31, 2026
May 05, 2026
Document Type 10-Q  
Document Quarterly Report true  
Document Period End Date Mar. 31, 2026  
Document Transition Report false  
Entity File Number 001-37836  
Entity Registrant Name INTERNATIONAL SEAWAYS, INC.  
Entity Incorporation, State or Country Code 1T  
Entity Tax Identification Number 98-0467117  
Entity Address, Address Line One 600 Third Avenue  
Entity Address, Address Line Two 39th Floor  
Entity Address, City or Town New York  
Entity Address, State or Province NY  
Entity Address, Postal Zip Code 10016  
City Area Code 212  
Local Phone Number 578-1600  
Entity Current Reporting Status Yes  
Entity Interactive Data Current Yes  
Entity Filer Category Large Accelerated Filer  
Entity Small Business false  
Entity Emerging Growth Company false  
Entity Shell Company false  
Entity Common Stock, Shares Outstanding   49,504,696
Entity Central Index Key 0001679049  
Current Fiscal Year End Date --12-31  
Amendment Flag false  
Document Fiscal Period Focus Q1  
Document Fiscal Year Focus 2026  
Common Stock    
Title of 12(b) Security Common Stock (no par value)  
Trading Symbol INSW  
Security Exchange Name NYSE  
Rights To Purchase Common Stock    
Title of 12(b) Security Rights to Purchase Common Stock  
No Trading Symbol Flag true  
Security Exchange Name NYSE