Acquisitions (Notes)

3 Months Ended

Dec. 31, 2014

Acquisitions [Abstract]

Business Combination Disclosure [Text Block]

Acquisitions

G.X. Clarke & Co.

Effective January 1, 2015, the Company completed its acquisition of G.X. Clarke & Co, an SEC registered institutional dealer in fixed income securities. G.X. Clarke & Co. is based in New Jersey, transacts in U.S. treasuries, federal agency and mortgage-backed securities, and is a FINRA member with an institutional client base consisting of asset managers, commercial bank trust and investment departments, broker-dealers, and insurance companies. The purchase price payable by INTL FCStone Inc., to be finalized after completion of a financial statement audit, is equal to G.X. Clarke & Co.'s net tangible book value at closing of approximately $26.0 million plus a premium of $1.5 million, and up to an additional $1.5 million over the next three years, subject to the achievement of certain profitability thresholds. In conjunction with the acquisition, the name of G.X. Clarke & Co. has been changed to INTL FCStone Partners L.P.