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Acquisitions - Quest Capital and Carl Kliem S.A. (Details) $ in Millions |  | 1 Months Ended | 3 Months Ended | 12 Months Ended
--- | --- | --- | --- | ---
Nov. 30, 2018 USD ($) employee client | Aug. 31, 2019 USD ($) | Sep. 30, 2020 USD ($) employee | Mar. 31, 2019 USD ($) | Sep. 30, 2019 USD ($)
Business Acquisition [Line Items] |  |  |  |  |
Number of employees | employee |  |  | 2,900 |  |
Bargain purchase gain |  |  | $ 81.8 | $ 5.4 |
Quest Capital Strategies Inc [Member] |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |
Purchase price |  | $ 1.7 |  |  |
Carl Kliem S.A. [Member] |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |
Number of employees | employee | 40 |  |  |  |
Number of clients | client | 400 |  |  |  |
Purchase price | $ 2.1 |  |  |  |
Cash and cash equivalents | 1.7 |  |  |  |
Receivables from clients | 1.1 |  |  |  |
Property and equipment, net | 0.1 |  |  |  |
Income tax receivable | 0.1 |  |  |  |
Accounts payable and other accrued liabilities | 0.6 |  |  |  |
Payable to clients | $ 0.2 |  |  |  |
Bargain purchase gain |  |  |  |  | $ 0.1
Operating revenues post-acquisition results of the acquired business |  |  |  |  | 4.2
Net income (loss) post-acquisition results of the acquired business |  |  |  |  | $ 2.3

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