Acquisitions - Summary of Acquisition Related Cost (Details) - USD ($) $ in Thousands |
12 Months Ended | ||
|---|---|---|---|
Dec. 31, 2019 |
Dec. 31, 2018 |
Dec. 31, 2017 |
|
| Acquisitions | |||
| Acquisition-related costs | $ 22,317 | $ 4,346 | $ 2,094 |
| USAA AMCO | |||
| Acquisitions | |||
| Acquisition-related costs | 21,333 | 3,180 | |
| Harvest | |||
| Acquisitions | |||
| Acquisition-related costs | 895 | 1,116 | |
| RS Investments | |||
| Acquisitions | |||
| Acquisition-related costs | 355 | ||
| Other | |||
| Acquisitions | |||
| Acquisition-related costs | $ 89 | $ 50 | $ 1,739 |