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Business Changes and Developments Business Changes and Developments - Additional Information (Details) - USD ($) $ in Thousands |  | 1 Months Ended | 12 Months Ended
--- | --- | --- | ---
Nov. 30, 2019 | Dec. 31, 2019 | Dec. 31, 2019 | Dec. 31, 2018 | Dec. 31, 2017
Business Acquisition [Line Items] |  |  |  |  |
Asset Acquisition, Contingent Consideration, Liability |  | $ 4,463 | $ 4,463 | $ 4,463 |
Asset Acquisition, Contingent Consideration Arrangements, Change In Amount Of Contingent Consideration, Liability |  |  | 400 | 3,971 |
Amortization of Intangible Assets |  |  | $ 8,077 | 9,199 | $ 9,793
Discount Rate | 17.00% | 17.00% |  |  |
Compound Annual Growth Rate | 3.00% | 3.00% | 3.00% |  |
Impairment of Goodwill |  |  | $ 2,921 |  |
Goodwill, Impairment Loss, Net of Tax |  |  | 1,361 |  | 3,694
PCA [Member] |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |
Issuance of Noncontrolling Interest |  |  |  | $ 770 |
Special Charges [Member] |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |
Impairment of Goodwill |  |  | 2,921 |  |
Special Charges [Member] | Investment Management [Member] | Institutional Asset Management [Member] |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |
Impairment of Goodwill |  |  | 2,088 |  | $ 7,107
Goodwill [Member] | Evercore Casa de Bolsa |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |
Assets Held-for-sale |  | $ 475 | 475 |  |
Annual Goodwill Assessment [Member] |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |
Goodwill, Impairment Loss, Net of Tax |  |  | 543 |  |
Annual Goodwill Assessment [Member] | Special Charges [Member] | Investment Management [Member] | Institutional Asset Management [Member] |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |
Impairment of Goodwill |  |  | $ 833 |  |

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