v3.22.2.2
Cover
Sep. 28, 2022
Cover [Abstract]  
Document Type 8-K
Document Period End Date Sep. 28, 2022
Entity Registrant Name KBS REAL ESTATE INVESTMENT TRUST III, INC.
Entity Incorporation, State or Country Code MD
Entity File Number 000-54687
Entity Tax Identification Number 27-1627696
Entity Address, Address Line One 800 Newport Center Drive
Entity Address, Address Line Two Suite 700
Entity Address, City or Town Newport Beach
Entity Address, State or Province CA
Entity Address, Postal Zip Code 92660
City Area Code 949
Local Phone Number 417-6500
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 0001482430
Amendment Flag false