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Intangible Assets - (Notes) | 9 Months Ended
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Jun. 30, 2020
Intangible Assets [Abstract] |
Intangible Assets Disclosure [Text Block] | Intangible Assets The Company recorded $4.2 million, $1.0 million, and $1.7 million of customer base intangible assets during the nine months ended June 30, 2020 related to the acquisitions of UOB Bullion and Futures Limited, IFCM Commodities GmbH, and Quest Capital, respectively, as further discussed in Note 18. The gross and net carrying values of intangible assets as of the balance sheet dates, by major intangible asset class are as follows (in millions):
| June 30, 2020 |  | September 30, 2019
| Gross Amount |  | Accumulated Amortization |  | Net Amount |  | Gross Amount |  | Accumulated Amortization |  | Net Amount
Intangible assets subject to amortization: |  |  |  |  |  |  |  |  |  |  |
Software programs/platforms | $ | 5.3 |  |  | $ | (3.4 | ) |  | $ | 1.9 |  |  | $ | 5.3 |  |  | $ | (3.0 | ) |  | $ | 2.3 |
Customer base | 29.1 |  |  | (15.1 | ) |  | 14.0 |  |  | 22.1 |  |  | (12.5 | ) |  | 9.6 |
Total intangible assets subject to amortization: | 34.4 |  |  | (18.5 | ) |  | 15.9 |  |  | 27.4 |  |  | (15.5 | ) |  | 11.9 |
Intangible assets not subject to amortization: |  |  |  |  |  |  |  |  |  |  |
Website domains | 2.1 |  |  | — |  |  | 2.1 |  |  | 2.1 |  |  | — |  |  | 2.1 |
Business licenses | 2.9 |  |  | — |  |  | 2.9 |  |  | 2.7 |  |  | — |  |  | 2.7 |
Total intangible assets not subject to amortization: | 5.0 |  |  | — |  |  | 5.0 |  |  | 4.8 |  |  | — |  |  | 4.8 |
Total intangible assets | $ | 39.4 |  |  | $ | (18.5 | ) |  | $ | 20.9 |  |  | $ | 32.2 |  |  | $ | (15.5 | ) |  | $ | 16.7 |
Amortization expense related to intangible assets was $1.1 million and $0.6 million for the three months ended June 30, 2020 and 2019, respectively. Amortization expense related to intangible assets was $3.0 million and $1.9 million for the nine months ended June 30, 2020 and 2019, respectively. As of June 30, 2020, the estimated future amortization expense was as follows:
(in millions) |
Fiscal 2020 (Remaining three months) | $ | 1.0 |
Fiscal 2021 | 4.2 |
Fiscal 2022 | 2.9 |
Fiscal 2023 | 2.7 |
Fiscal 2024 and thereafter | 5.1 |
Total intangible assets subject to amortization | $ | 15.9 |

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- Definition Intangible Assets [Abstract] + References No definition available. + Details
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- Definition The entire disclosure for all or part of the information related to intangible assets. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -URI http://asc.fasb.org/topic&trid=2144416 + Details
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