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Acquisitions GMP Securities, LLC (Details) - USD ($) $ in Millions | 9 Months Ended | 12 Months Ended |
--- | --- | --- | ---
Jun. 30, 2019 | Sep. 30, 2019 | Jan. 14, 2019
Business Acquisition [Line Items] |  |  |
Business Combination, Bargain Purchase, Gain Recognized, Amount | $ 5.4 |  |
GMP Securities Acquisition [Member] |  |  |
Business Acquisition [Line Items] |  |  |
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Cash and Equivalents |  |  | $ 1.1
Business Combination, Acquired Receivables, Gross Contractual Amount |  |  | 7.7
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Financial Assets |  |  | 7.1
Business Combination Recognized Identifiable Assets Acquired and Liabilities Assumed, Deferred Tax Assets |  |  | 2.7
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Property, Plant, and Equipment |  |  | 0.7
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Current Assets, Prepaid Expense and Other Assets |  |  | 0.7
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Assets |  |  | 20.0
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Current Liabilities, Accounts Payable |  |  | 1.9
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Current Liabilities, Other |  |  | 0.1
Business Combination, Pro Forma Information, Revenue of Acquiree since Acquisition Date, Actual |  | $ 8.2 |
Business Combination, Pro Forma Information, Earnings or Loss of Acquiree since Acquisition Date, Actual |  | 2.1 |
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Financial Liabilities |  |  | 4.4
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Liabilities |  |  | 6.4
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Net |  |  | $ 13.6
Business Combination, Consideration Transferred | $ 8.2 |  |
Business Combination, Bargain Purchase, Gain Recognized, Amount |  | $ 5.4 |

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- Definition Amount of currency on hand as well as demand deposits with banks or financial institutions, acquired at the acquisition date. Includes other kinds of accounts that have the general characteristics of demand deposits. Also includes short-term, highly liquid investments that are both readily convertible to known amounts of cash and so near their maturity that they present insignificant risk of changes in value because of changes in interest rates. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 805 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=84161108&loc=d3e4845-128472 + Details
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