Organization and Business Operations	9 Months Ended
Sep. 30, 2014
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Organization and Business Operations	Organization and Business Operations ARC Realty Finance Trust, Inc. (the "Company") was incorporated in Maryland on November 15, 2012 and conducts its operations to qualify as a real estate investment trust ("REIT") for U.S. federal income tax purposes beginning with the filing of its tax return for the taxable year ended December 31, 2013. The Company is offering for sale a maximum of $2.0 billion of common stock, $0.01 par value per share, on a "reasonable best efforts" basis, pursuant to a registration statement on Form S-11 (the "Offering") filed with the U.S. Securities and Exchange Commission (the "SEC") under the Securities Act of 1933, as amended (the "Securities Act"). The Offering also covers the offer and sale of up to approximately $400.0 million in shares of common stock pursuant to a distribution reinvestment plan (the "DRIP") under which common stockholders may elect to have their distributions reinvested in additional shares of the Company’s common stock. On May 14, 2013, the Company commenced business operations after raising in excess of $2.0 million of equity, the amount required for the Company to release equity proceeds from escrow. For at least until February 12, 2015, which is two years from the effective date of the Offering, the per share purchase price in the Offering will be up to $25.00 per share (including the maximum allowed to be charged for commissions and fees) and the per share purchase price for shares issued under the DRIP will be $23.75 per share, which is 95% of the purchase price per share in the Offering. As of September 30, 2014, the aggregate value of all the common stock outstanding was $283.2 million based on a per share value of $25.00 (or $23.75 for shares issued under DRIP). Beginning with the filing of the Company's second Quarterly Report on Form 10-Q following February 12, 2015 ("NAV Pricing Date"), the Company will begin offering shares in the Offering and the DRIP at a per share purchase price that will vary quarterly and will be equal to the net asset value ("NAV") divided by the number of shares outstanding as of the end of the business day immediately preceding the day on which the Company makes its quarterly periodic filing ("per share NAV"). Applicable selling commissions and dealer manager fees will be added to the per share price for shares in the Company’s primary offering but not for the DRIP. The Company has sold 8,888 shares of the Company's common stock to ARC Realty Finance Special Limited Partnership, LLC (the "Special Limited Partner"), an entity controlled by American Realty Capital VIII, LLC (the "Sponsor") for $22.50 per share or a total of $0.2 million. Substantially all of the Company's business is conducted through ARC Realty Finance Operating Partnership, L.P. (the "OP"), a Delaware limited partnership. ARC Realty Finance Advisors, LLC (the "Advisor"), a Delaware limited liability company, is the Company’s advisor. The Company is the sole general partner and holds substantially all of the units of limited partner interests in the OP ("OP units"). Additionally, the Special Limited Partner contributed $2,020 to the OP in exchange for 90 units of limited partner interests in the aggregate OP ownership, which represents a nominal percentage of the aggregate OP ownership. The limited partner interests have the right to convert OP units for the cash value of a corresponding number of shares of the Company's common stock or, at the option of the OP, a corresponding number of shares of the Company's common stock, as allowed by the limited partnership agreement of the OP. The remaining rights of the limited partner interests do not include the ability to replace the general partner or to approve the sale, purchase or refinancing of the OP’s assets. The Company was formed to acquire, originate and manage a diversified portfolio of commercial real estate debt investments secured by properties located both within and outside of the United States. The Company may also invest in commercial real estate securities and commercial real estate properties. Commercial real estate debt investments may include first mortgage loans, subordinated mortgage loans, mezzanine loans and participations in such loans. Commercial real estate securities may include commercial mortgage-backed securities ("CMBS"), senior unsecured debt of publicly traded REITs, debt or equity securities of other publicly traded real estate companies and collateralized debt obligations ("CDOs"). The Company has no direct employees. The Company has retained the Advisor to manage the Company's affairs on a day-to-day basis. Realty Capital Securities, LLC (the "Dealer Manager") serves as the dealer manager of the Offering. The Advisor and Dealer Manager are under common control with the parent of the Sponsor, as a result of which they are related parties and each of them have or will receive compensation and fees for services related to the Offering and the investment and management of the Company's assets. The Advisor and Dealer Manager have or will also receive fees during the Offering, acquisition, operational and liquidation stages of the Company.

Organization and Business Operations

ARC Realty Finance Trust, Inc. (the "Company") was incorporated in Maryland on November 15, 2012 and conducts its operations to qualify as a real estate investment trust ("REIT") for U.S. federal income tax purposes beginning with the filing of its tax return for the taxable year ended December 31, 2013. The Company is offering for sale a maximum of $2.0 billion of common stock, $0.01 par value per share, on a "reasonable best efforts" basis, pursuant to a registration statement on Form S-11 (the "Offering") filed with the U.S. Securities and Exchange Commission (the "SEC") under the Securities Act of 1933, as amended (the "Securities Act"). The Offering also covers the offer and sale of up to approximately $400.0 million in shares of common stock pursuant to a distribution reinvestment plan (the "DRIP") under which common stockholders may elect to have their distributions reinvested in additional shares of the Company’s common stock. On May 14, 2013, the Company commenced business operations after raising in excess of $2.0 million of equity, the amount required for the Company to release equity proceeds from escrow.

For at least until February 12, 2015, which is two years from the effective date of the Offering, the per share purchase price in the Offering will be up to $25.00 per share (including the maximum allowed to be charged for commissions and fees) and the per share purchase price for shares issued under the DRIP will be $23.75 per share, which is 95% of the purchase price per share in the Offering. As of September 30, 2014, the aggregate value of all the common stock outstanding was $283.2 million based on a per share value of $25.00 (or $23.75 for shares issued under DRIP). Beginning with the filing of the Company's second Quarterly Report on Form 10-Q following February 12, 2015 ("NAV Pricing Date"), the Company will begin offering shares in the Offering and the DRIP at a per share purchase price that will vary quarterly and will be equal to the net asset value ("NAV") divided by the number of shares outstanding as of the end of the business day immediately preceding the day on which the Company makes its quarterly periodic filing ("per share NAV"). Applicable selling commissions and dealer manager fees will be added to the per share price for shares in the Company’s primary offering but not for the DRIP.

The Company has sold 8,888 shares of the Company's common stock to ARC Realty Finance Special Limited Partnership, LLC (the "Special Limited Partner"), an entity controlled by American Realty Capital VIII, LLC (the "Sponsor") for $22.50 per share or a total of $0.2 million. Substantially all of the Company's business is conducted through ARC Realty Finance Operating Partnership, L.P. (the "OP"), a Delaware limited partnership. ARC Realty Finance Advisors, LLC (the "Advisor"), a Delaware limited liability company, is the Company’s advisor. The Company is the sole general partner and holds substantially all of the units of limited partner interests in the OP ("OP units"). Additionally, the Special Limited Partner contributed $2,020 to the OP in exchange for 90 units of limited partner interests in the aggregate OP ownership, which represents a nominal percentage of the aggregate OP ownership. The limited partner interests have the right to convert OP units for the cash value of a corresponding number of shares of the Company's common stock or, at the option of the OP, a corresponding number of shares of the Company's common stock, as allowed by the limited partnership agreement of the OP. The remaining rights of the limited partner interests do not include the ability to replace the general partner or to approve the sale, purchase or refinancing of the OP’s assets.

The Company was formed to acquire, originate and manage a diversified portfolio of commercial real estate debt investments secured by properties located both within and outside of the United States. The Company may also invest in commercial real estate securities and commercial real estate properties. Commercial real estate debt investments may include first mortgage loans, subordinated mortgage loans, mezzanine loans and participations in such loans. Commercial real estate securities may include commercial mortgage-backed securities ("CMBS"), senior unsecured debt of publicly traded REITs, debt or equity securities of other publicly traded real estate companies and collateralized debt obligations ("CDOs").

The Company has no direct employees. The Company has retained the Advisor to manage the Company's affairs on a day-to-day basis. Realty Capital Securities, LLC (the "Dealer Manager") serves as the dealer manager of the Offering. The Advisor and Dealer Manager are under common control with the parent of the Sponsor, as a result of which they are related parties and each of them have or will receive compensation and fees for services related to the Offering and the investment and management of the Company's assets. The Advisor and Dealer Manager have or will also receive fees during the Offering, acquisition, operational and liquidation stages of the Company.