v3.26.3
Cover Page - shares
 9 Months Ended
Sep. 30, 2026
Oct. 26, 2026
Document Information [Line Items]    
Document Type 10-Q  
Document Quarterly Report true  
Document Period End Date Sep. 30, 2026  
Document Transition Report false  
Entity File Number 001-38082  
Entity Registrant Name KKR Real Estate Finance Trust Inc.  
Entity Incorporation, State or Country Code MD  
Entity Tax Identification Number 47-2009094  
Entity Address, Address Line One 30 Hudson Yards,  
Entity Address, Address Line Two Suite 7500  
Entity Address, City or Town New York,  
Entity Address, State or Province NY  
Entity Address, Postal Zip Code 10001  
City Area Code 212  
Local Phone Number 750-8300  
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 Common Stock, Shares Outstanding   57,306,245
Entity Central Index Key 0001631596  
Amendment Flag false  
Current Fiscal Year End Date --12-31  
Document Fiscal Year Focus 2026  
Document Fiscal Period Focus Q3  
Common Stock    
Document Information [Line Items]    
Title of 12(b) Security Common stock, par value $0.01 per share  
Trading Symbol KREF  
Security Exchange Name NYSE  
6.5% Series A Cumulative Redeemable Preferred Stock    
Document Information [Line Items]    
Title of 12(b) Security 6.50% Series A Cumulative Redeemable Preferred Stock, par value $0.01 per share  
Trading Symbol KREF PRA  
Security Exchange Name NYSE