Document and Entity Information
Jan. 12, 2022
Entity Listings [Line Items]  
Document Type 8-K
Amendment Flag false
Document Period End Date Jan. 12, 2022
Current Fiscal Year End Date --12-31
Entity Registrant Name KKR Real Estate Finance Trust Inc.
Entity Incorporation, State or Country Code MD
Entity File Number 001-38082
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
Written Communications false
Soliciting Material false
Pre-commencement Tender Offer false
Pre-commencement Issuer Tender Offer false
Entity Emerging Growth Company false
Entity Central Index Key 0001631596
Common Stock [Member]  
Entity Listings [Line Items]  
Title of 12(b) Security Common stock, par value $0.01 per share
Trading Symbol KREF
Security Exchange Name NYSE
6.50% Series A Cumulative Redeemable Preferred Stock, par value $0.01 per share [Member]  
Entity Listings [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