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Revenues (Tables) | 9 Months Ended
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Sep. 30, 2021
Revenue from Contract with Customer [Abstract] |
Disaggregation of Revenue | The following table summarizes investment management fees by source:
| Three Months Ended September 30, |  | Nine Months Ended September 30,
(in thousands) | 2021 |  | 2020 |  | 2021 |  | 2020
Investment management fees |  |  |  |  |  |  |
Open-end funds | $ | 99,278 |  |  | $ | 63,458 |  |  | $ | 284,945 |  |  | $ | 176,584 |
Closed-end funds | 17,116 |  |  | 8,959 |  |  | 46,451 |  |  | 27,695 |
Retail separate accounts | 46,625 |  |  | 26,412 |  |  | 126,612 |  |  | 74,524 |
Institutional accounts | 36,728 |  |  | 29,048 |  |  | 104,948 |  |  | 76,571 |
Structured products | 953 |  |  | 1,297 |  |  | 3,797 |  |  | 3,288 |
Other products | 433 |  |  | 611 |  |  | 1,159 |  |  | 1,961 |
Total investment management fees | $ | 201,133 |  |  | $ | 129,785 |  |  | $ | 567,912 |  |  | $ | 360,623 |

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- Definition Tabular disclosure of disaggregation of revenue into categories depicting how nature, amount, timing, and uncertainty of revenue and cash flows are affected by economic factor. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 606 -SubTopic 10 -Section 50 -Paragraph 5 -URI http://asc.fasb.org/extlink&oid=123351226&loc=SL49130545-203045 + Details
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