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Acquisitions (Notes) | 3 Months Ended
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Dec. 31, 2015
Acquisitions [Abstract] |
Business Combination Disclosure [Text Block] | Acquisitions G.X. Clarke & Co. In January 2015, the Company acquired G.X. Clarke & Co., an SEC registered institutional dealer in fixed income securities. G.X. Clarke 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. Per ASC 805-10-50-2 and S-X Rule 10-01(b)(4) pro forma results of operations for revenues, net income and net income per share are to be presented for the current year, up to the end of the current quarter and for the comparable period of the preceding year, as though the companies had been combined at the beginning of the period being reported on. The following unaudited pro forma information presents a summary of the consolidated results of operations for the Company as if the acquisition had occurred on October 1, 2013. The unaudited pro forma consolidated results of operations are based on the Company’s historical financial statements and those of G.X. Clarke and do not necessarily indicate the results of operations that would have resulted had the acquisition actually been completed at the beginning of the applicable period presented. The pro forma results reflect the business combination accounting effects from the acquisition including adjusting for non-recurring interest expense on subordinated debt incurred by G.X. Clarke, acquisition related expenses incurred by the Company and G.X. Clarke, and income taxes of G.X. Clarke, which was treated as a partnership for U.S. federal income tax purposes prior to the acquisition. The unaudited pro forma consolidated results are not indicative of the results of operations in future periods.
Proforma Results of Operations: |  |  | Three Months Ended December 31, 2014
(in millions, except per share amounts) |  |  |  |  |  |  | INTL FCStone Inc. |  | G.X. Clarke & Co. |  | Combined
Operating revenues |  |  |  |  |  |  | $ | 137.5 |  |  | 8.7 |  |  | $ | 146.2 |
Net income |  |  |  |  |  |  | $ | 9.4 |  |  | 0.7 |  |  | $ | 10.1 |
Basic earnings per share |  |  |  |  |  |  | $ | 0.50 |  |  | 0.04 |  |  | $ | 0.54 |
Diluted earnings per share |  |  |  |  |  |  | $ | 0.49 |  |  | 0.04 |  |  | $ | 0.53 |

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- Definition The entire disclosure for a business combination (or series of individually immaterial business combinations) completed during the period, including background, timing, and recognized assets and liabilities. The disclosure may include leverage buyout transactions (as applicable). + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 805 -SubTopic 10 -Section 50 -Paragraph 5 -URI http://asc.fasb.org/extlink&oid=56956515&loc=d3e1497-128463 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 805 -SubTopic 10 -Section 50 -Paragraph 4 -URI http://asc.fasb.org/extlink&oid=56956515&loc=d3e1490-128463 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 805 -SubTopic 10 -Section 50 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=56956515&loc=d3e1392-128463 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 805 -SubTopic 30 -Section 50 -Paragraph 4 -URI http://asc.fasb.org/extlink&oid=35744584&loc=d3e7008-128479 Reference 5: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 805 -SubTopic 10 -Section 50 -Paragraph 3 -URI http://asc.fasb.org/extlink&oid=56956515&loc=d3e1486-128463 Reference 6: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 805 -SubTopic 30 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=35744584&loc=d3e6927-128479 Reference 7: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 805 -SubTopic 20 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=56956791&loc=d3e4845-128472 Reference 8: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 805 -SubTopic 10 -Section 50 -Paragraph 6 -URI http://asc.fasb.org/extlink&oid=56956515&loc=d3e1500-128463 Reference 9: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 805 -SubTopic 10 -Section 50 -Paragraph 7 -URI http://asc.fasb.org/extlink&oid=56956515&loc=d3e1524-128463 Reference 10: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 805 -SubTopic 30 -Section 50 -Paragraph 3 -URI http://asc.fasb.org/extlink&oid=35744584&loc=d3e7000-128479 Reference 11: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 805 -SubTopic 20 -Section 50 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=56956791&loc=d3e4922-128472 Reference 12: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 805 -SubTopic 20 -Section 50 -Paragraph 4 -URI http://asc.fasb.org/extlink&oid=56956791&loc=d3e4934-128472 Reference 13: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 805 -SubTopic 20 -Section 50 -Paragraph 3 -URI http://asc.fasb.org/extlink&oid=56956791&loc=d3e4926-128472 Reference 14: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 805 -SubTopic 10 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=56956515&loc=d3e1383-128463 Reference 15: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 805 -SubTopic 30 -Section 50 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=35744584&loc=d3e6996-128479 + Details
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