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Business Combinations and Divestitures - Summary of Consideration Received and Gain on Sale (Details) - USD ($) |  | 6 Months Ended
--- | --- | ---
Mar. 31, 2017 | Jun. 30, 2017
Business Acquisition [Line Items] |  |
Gain on sale of subsidiary, net of transaction costs |  | $ 20,860,000
Triumph Capital Advisors, LLC |  |
Business Acquisition [Line Items] |  |
Cash | $ 10,554,000 |
Loan receivable | 10,500,000 |
Revenue share | 1,623,000 |
Total consideration received | 22,677,000 |
Carrying value of TCA membership interest | 1,417,000 |
Gain on sale of subsidiary | 21,260,000 |
Transaction costs | 400,000 |
Gain on sale of subsidiary, net of transaction costs | $ 20,860,000 |

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- Definition Amount of gain (loss) on sale or disposal of equity in securities of subsidiaries. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 225 -Section S99 -Paragraph 1 -Subparagraph (13)(g) -URI http://asc.fasb.org/extlink&oid=6879574&loc=d3e536633-122882 + Details
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