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Revenues (Tables) | 6 Months Ended
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Jun. 30, 2021
Revenue from Contract with Customer [Abstract] |
Disaggregation of Revenue | The following table summarizes investment management fees by source:
| Three Months Ended June 30, |  | Six Months Ended June 30,
(in thousands) | 2021 |  | 2020 |  | 2021 |  | 2020
Investment management fees |  |  |  |  |  |  |
Open-end funds | $ | 96,795 |  |  | $ | 54,018 |  |  | $ | 185,667 |  |  | $ | 113,126 |
Closed-end funds | 16,395 |  |  | 8,557 |  |  | 29,335 |  |  | 18,736 |
Retail separate accounts | 42,475 |  |  | 22,398 |  |  | 79,987 |  |  | 48,112 |
Institutional accounts | 35,782 |  |  | 24,606 |  |  | 68,220 |  |  | 47,523 |
Structured products | 1,585 |  |  | 417 |  |  | 2,844 |  |  | 1,991 |
Other products | 478 |  |  | 554 |  |  | 726 |  |  | 1,350 |
Total investment management fees | $ | 193,510 |  |  | $ | 110,550 |  |  | $ | 366,779 |  |  | $ | 230,838 |

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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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