v3.26.3
Document and Entity Information - shares
 9 Months Ended
Sep. 30, 2026
Nov. 02, 2026
Document Information [Line Items]    
Entity Registrant Name Claros Mortgage Trust, Inc.  
Entity Central Index Key 0001666291  
Document Type 10-Q  
Document Quarterly Report true  
Document Transition Report false  
Document Period End Date Sep. 30, 2026  
Amendment Flag false  
Current Fiscal Year End Date --12-31  
Entity Current Reporting Status Yes  
Entity Interactive Data Current Yes  
Entity Filer Category Accelerated Filer  
Entity Small Business false  
Entity Emerging Growth Company false  
Trading Symbol CMTG  
Entity Shell Company false  
Entity Common Stock, Shares Outstanding   141,085,961
Document Fiscal Year Focus 2026  
Document Fiscal Period Focus Q3  
Entity File Number 001-40993  
Entity Tax Identification Number 47-4074900  
Entity Address, Address Line One c/o Mack Real Estate Credit Strategies, L.P.  
Entity Address, Address Line Two 40 West 57th Street  
Entity Address, Address Line Three Suite 1720  
Entity Address, City or Town New York  
Entity Address, State or Province NY  
Entity Address, Postal Zip Code 10019  
City Area Code 212  
Local Phone Number 484-0050  
Title of 12(b) Security Common Stock, $0.01 par value per share  
Security Exchange Name NYSE  
Entity Incorporation, State or Country Code MD  
Former Address    
Document Information [Line Items]    
Entity Address, Address Line One 60 Columbus Circle  
Entity Address, Address Line Two 20th Floor  
Entity Address, City or Town New York  
Entity Address, State or Province NY  
Entity Address, Postal Zip Code 10023