ORGANIZATION	9 Months Ended
Sep. 30, 2013
Organization, Consolidation and Presentation of Financial Statements [Abstract]
ORGANIZATION	ORGANIZATION KBS Real Estate Investment Trust III, Inc. (the “Company”) was formed on December 22, 2009 as a Maryland corporation that elected to be taxed as a real estate investment trust (“REIT”) beginning with the taxable year ended December 31, 2011. Substantially all of the Company’s business is expected to be conducted through KBS Limited Partnership III (the “Operating Partnership”), a Delaware limited partnership. The Company is the sole general partner of and owns a 0.1% partnership interest in the Operating Partnership. KBS REIT Holdings III LLC (“REIT Holdings III”), the limited partner of the Operating Partnership, owns the remaining 99.9% interest in the Operating Partnership and is its sole limited partner. The Company is the sole member and manager of REIT Holdings III. Subject to certain restrictions and limitations, the business of the Company is externally managed by KBS Capital Advisors LLC (the “Advisor”), an affiliate of the Company, pursuant to an advisory agreement the Company entered into with the Advisor (the “Advisory Agreement”). On January 26, 2010, the Company issued 20,000 shares of its common stock to the Advisor at a purchase price of $10.00 per share. As of September 30, 2013, the Advisor owned 20,000 shares of the Company’s common stock. The Company intends to invest in a diverse portfolio of real estate investments. The primary types of properties the Company expects to invest in include office, industrial and retail properties located throughout the United States. All such real estate assets may be acquired directly by the Company or the Operating Partnership, though the Company may invest in other entities that make similar investments. The Company expects its primary investment focus to be core properties. The Company also currently expects to allocate between 0 and 20% of its portfolio to real estate-related investments such as mortgage, mezzanine, bridge and other loans; debt and derivative securities related to real estate assets, including mortgage-backed securities; and the equity securities of other REITs and real estate companies. As of September 30, 2013, the Company owned ten office properties and one first mortgage loan secured by a deed of trust. On February 4, 2010, the Company filed a registration statement on Form S-11 with the Securities and Exchange Commission (the “SEC”) to offer a minimum of 250,000 shares and a maximum of 280,000,000 shares of common stock for sale to the public (the “Offering”), of which 80,000,000 shares are being offered pursuant to the Company’s dividend reinvestment plan. The SEC declared the Company’s registration statement effective on October 26, 2010, and the Company retained KBS Capital Markets Group LLC (the “Dealer Manager”), an affiliate of the Company, to serve as the dealer manager of the Offering pursuant to a dealer manager agreement, as amended and restated (the “Dealer Manager Agreement”). As described above, the Company intends to use substantially all of the net proceeds from the Offering to invest in a diverse portfolio of real estate investments. On March 24, 2011, the Company broke escrow in the Offering and through September 30, 2013, the Company had sold 53,453,100 shares of common stock for gross offering proceeds of $531.6 million including 1,467,331 shares of common stock under its dividend reinvestment plan for gross offering proceeds of $13.9 million. The Company has extended the closing date of its primary initial public offering until the earlier of the sale of all 200,000,000 shares, April 24, 2014 or the date the registration statement relating to the Company’s proposed follow-on public offering (the “Follow-on Offering”) is declared effective by the SEC. As of September 30, 2013, the Company had redeemed 244,315 shares sold in the Offering for $2.4 million. On February 14, 2013, the Company filed a registration statement on Form S-11 with the SEC to register the Follow-on Offering. Pursuant to the Follow-on Offering registration statement, the Company proposes to register up to $2,000,000,000 of shares of common stock for sale to the public in the primary Follow-on Offering. The Company also expects to register up to $760,000,000 of shares of common stock pursuant to the Company’s dividend reinvestment plan in the Follow-on Offering. The Company can give no assurance that it will commence or complete the Follow-on Offering. Its offering stage will depend on a number of considerations, including the composition of its portfolio and opportunities in the market for real estate investments. The Company will continue to monitor these factors and may adjust the termination date of its offering stage as necessary should these factors change. The Company plans to continue to offer shares under its dividend reinvestment plan beyond the termination of the offering stage for its primary offering until it has sold 80,000,000 shares through the reinvestment of distributions. The Company may terminate either offering at any time.

ORGANIZATION

9 Months Ended

Sep. 30, 2013

Organization, Consolidation and Presentation of Financial Statements [Abstract]

KBS Real Estate Investment Trust III, Inc. (the “Company”) was formed on December 22, 2009 as a Maryland corporation that elected to be taxed as a real estate investment trust (“REIT”) beginning with the taxable year ended December 31, 2011. Substantially all of the Company’s business is expected to be conducted through KBS Limited Partnership III (the “Operating Partnership”), a Delaware limited partnership. The Company is the sole general partner of and owns a 0.1% partnership interest in the Operating Partnership. KBS REIT Holdings III LLC (“REIT Holdings III”), the limited partner of the Operating Partnership, owns the remaining 99.9% interest in the Operating Partnership and is its sole limited partner. The Company is the sole member and manager of REIT Holdings III.

Subject to certain restrictions and limitations, the business of the Company is externally managed by KBS Capital Advisors LLC (the “Advisor”), an affiliate of the Company, pursuant to an advisory agreement the Company entered into with the Advisor (the “Advisory Agreement”). On January 26, 2010, the Company issued 20,000 shares of its common stock to the Advisor at a purchase price of $10.00 per share. As of September 30, 2013, the Advisor owned 20,000 shares of the Company’s common stock.

The Company intends to invest in a diverse portfolio of real estate investments. The primary types of properties the Company expects to invest in include office, industrial and retail properties located throughout the United States. All such real estate assets may be acquired directly by the Company or the Operating Partnership, though the Company may invest in other entities that make similar investments. The Company expects its primary investment focus to be core properties. The Company also currently expects to allocate between 0 and 20% of its portfolio to real estate-related investments such as mortgage, mezzanine, bridge and other loans; debt and derivative securities related to real estate assets, including mortgage-backed securities; and the equity securities of other REITs and real estate companies. As of September 30, 2013, the Company owned ten office properties and one first mortgage loan secured by a deed of trust.

On February 4, 2010, the Company filed a registration statement on Form S-11 with the Securities and Exchange Commission (the “SEC”) to offer a minimum of 250,000 shares and a maximum of 280,000,000 shares of common stock for sale to the public (the “Offering”), of which 80,000,000 shares are being offered pursuant to the Company’s dividend reinvestment plan. The SEC declared the Company’s registration statement effective on October 26, 2010, and the Company retained KBS Capital Markets Group LLC (the “Dealer Manager”), an affiliate of the Company, to serve as the dealer manager of the Offering pursuant to a dealer manager agreement, as amended and restated (the “Dealer Manager Agreement”). As described above, the Company intends to use substantially all of the net proceeds from the Offering to invest in a diverse portfolio of real estate investments.

On March 24, 2011, the Company broke escrow in the Offering and through September 30, 2013, the Company had sold 53,453,100 shares of common stock for gross offering proceeds of $531.6 million including 1,467,331 shares of common stock under its dividend reinvestment plan for gross offering proceeds of $13.9 million. The Company has extended the closing date of its primary initial public offering until the earlier of the sale of all 200,000,000 shares, April 24, 2014 or the date the registration statement relating to the Company’s proposed follow-on public offering (the “Follow-on Offering”) is declared effective by the SEC.

As of September 30, 2013, the Company had redeemed 244,315 shares sold in the Offering for $2.4 million.

On February 14, 2013, the Company filed a registration statement on Form S-11 with the SEC to register the Follow-on Offering. Pursuant to the Follow-on Offering registration statement, the Company proposes to register up to $2,000,000,000 of shares of common stock for sale to the public in the primary Follow-on Offering. The Company also expects to register up to $760,000,000 of shares of common stock pursuant to the Company’s dividend reinvestment plan in the Follow-on Offering.

The Company can give no assurance that it will commence or complete the Follow-on Offering. Its offering stage will depend on a number of considerations, including the composition of its portfolio and opportunities in the market for real estate investments. The Company will continue to monitor these factors and may adjust the termination date of its offering stage as necessary should these factors change.

The Company plans to continue to offer shares under its dividend reinvestment plan beyond the termination of the offering stage for its primary offering until it has sold 80,000,000 shares through the reinvestment of distributions.

The Company may terminate either offering at any time.