XML 27 R15.htm IDEA: XBRL DOCUMENT
v3.7.0.1

Intangible Assets - (Notes) | 6 Months Ended
--- | ---
Mar. 31, 2017
Intangible Assets [Abstract] |
Intangible Assets Disclosure [Text Block] | Intangible Assets During the six months ended March 31, 2017 , the Company recorded additional intangible assets of $6.0 million as part of the ICAP acquisition. See Note 16 - Acquisitions for additional discussion. The gross and net carrying values of intangible assets as of the balance sheet dates, by major intangible asset class are as follows:
| March 31, 2017 |  | September 30, 2016
(in millions) | Gross Amount |  | Accumulated Amortization |  | Net Amount |  | Gross Amount |  | Accumulated Amortization |  | Net Amount
Intangible assets subject to amortization |  |  |  |  |  |  |  |  |  |  |
Trade name | $ | 1.1 |  |  | $ | (0.8 | ) |  | $ | 0.3 |  |  | $ | 1.1 |  |  | $ | (0.6 | ) |  | $ | 0.5 |
Software programs/platforms | 2.7 |  |  | (2.4 | ) |  | 0.3 |  |  | 2.7 |  |  | (2.4 | ) |  | 0.3 |
Customer base | 20.0 |  |  | (6.9 | ) |  | 13.1 |  |  | 14.0 |  |  | (5.7 | ) |  | 8.3 |
Total intangible assets | $ | 23.8 |  |  | $ | (10.1 | ) |  | $ | 13.7 |  |  | $ | 17.8 |  |  | $ | (8.7 | ) |  | $ | 9.1 |
Amortization expense related to intangible assets was $1.4 million and $0.8 million for the six months ended March 31, 2017 and 2016, respectively. As of March 31, 2017, the estimated future amortization expense was as follows:
(in millions) |
Fiscal 2017 (remaining six months) | $ | 1.4 |
Fiscal 2018 | 2.2 |
Fiscal 2019 | 2.2 |
Fiscal 2020 | 2.0 |
Fiscal 2021 and thereafter | 5.9 |
| $ | 13.7 |

X
- Definition Intangible Assets [Abstract] + References No definition available. + Details
Name: | intl_IntangibleAssetsAbstract
Namespace Prefix: | intl_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition The entire disclosure for all or part of the information related to intangible assets. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 30 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=66006027&loc=d3e16265-109275 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 30 -Section 50 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=66006027&loc=d3e16323-109275 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 30 -Section 50 -Paragraph 3 -URI http://asc.fasb.org/extlink&oid=66006027&loc=d3e16373-109275 + Details
Name: | us-gaap_IntangibleAssetsDisclosureTextBlock
Namespace Prefix: | us-gaap_
Data Type: | nonnum:textBlockItemType
Balance Type: | na
Period Type: | duration