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Segment Information - Reported Revenue and Profit Before Income Taxes (Details) - USD ($) $ in Thousands | 3 Months Ended | 6 Months Ended |
--- | --- | --- | ---
Jun. 30, 2017 | Jun. 30, 2016 | Jun. 30, 2017 | Jun. 30, 2016 | Dec. 31, 2016
Revenue |  |  |  |  |  |  |  |
Revenue |  | $ 215,884 | $ 212,074 | [1] | $ 429,145 | $ 427,030 | [1] |
Income (loss) before income taxes |  |  |  |  |  |  |  |
Total income (loss) before income taxes |  | (1,637) | (5,246) | [1] | (8,662) | (12,586) | [1] |
Private Client Division [Member] |  |  |  |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |  |  |  |
Revenue Allocation Percentage prior to January 1, 2017 |  |  |  |  |  |  |  | 77.50%
Revenue |  |  |  |  |  |  |  |
Revenue | [2] | 140,252 | 121,358 |  | 277,641 | 248,902 |  |
Income (loss) before income taxes |  |  |  |  |  |  |  |
Total income (loss) before income taxes | [2] | $ 28,051 | $ 14,345 |  | $ 56,813 | $ 30,662 |  |
Asset management fees |  | 90.00% | 77.50% |  | 90.00% | 77.50% |  |
Asset Management [Member] |  |  |  |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |  |  |  |
Revenue Allocation Percentage prior to January 1, 2017 |  |  |  |  |  |  |  | 22.50%
Revenue |  |  |  |  |  |  |  |
Revenue | [2] | $ 19,304 | $ 22,770 |  | $ 37,970 | $ 45,744 |  |
Income (loss) before income taxes |  |  |  |  |  |  |  |
Total income (loss) before income taxes | [2] | $ 4,081 | $ 5,703 |  | $ 7,792 | $ 12,471 |  |
Asset management fees |  | 10.00% | 22.50% |  | 10.00% | 22.50% |  |
Capital Markets [Member] |  |  |  |  |  |  |  |
Revenue |  |  |  |  |  |  |  |
Revenue |  | $ 53,707 | $ 65,524 |  | $ 109,610 | $ 126,589 |  |
Income (loss) before income taxes |  |  |  |  |  |  |  |
Total income (loss) before income taxes |  | (10,982) | 4,045 |  | (23,596) | (2,753) |  |
Corporate and Other [Member] |  |  |  |  |  |  |  |
Revenue |  |  |  |  |  |  |  |
Revenue |  | 2,621 | 2,422 |  | 3,924 | 5,795 |  |
Income (loss) before income taxes |  |  |  |  |  |  |  |
Total income (loss) before income taxes |  | $ (22,787) | $ (29,339) |  | $ (49,671) | $ (52,966) |  |
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[2] | Advisory fees were allocated 22.5% to the Asset Management and 77.5% to the Private Client segments.

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