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Revenues (Tables) | 6 Months Ended
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Jun. 30, 2022
Revenue from Contract with Customer [Abstract] |
Investment Management Fees by Source | The following table summarizes investment management fees by source:
| Three Months Ended June 30, |  | Six Months Ended June 30,
(in thousands) | 2022 |  | 2021 |  | 2022 |  | 2021
Investment management fees |  |  |  |  |  |  |
Open-end funds | $ | 84,875 |  |  | $ | 97,273 |  |  | $ | 182,252 |  |  | $ | 186,393 |
Closed-end funds | 16,174 |  |  | 16,395 |  |  | 33,114 |  |  | 29,335 |
Retail separate accounts | 45,312 |  |  | 42,475 |  |  | 94,915 |  |  | 79,987 |
Institutional accounts | 38,663 |  |  | 37,367 |  |  | 81,560 |  |  | 71,064 |
Total investment management fees | $ | 185,024 |  |  | $ | 193,510 |  |  | $ | 391,841 |  |  | $ | 366,779 |

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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 https://asc.fasb.org/extlink&oid=126920106&loc=SL49130545-203045 + Details
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