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Revenues (Tables) | 3 Months Ended
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Mar. 31, 2020
Revenue from Contract with Customer [Abstract] |
Disaggregation of Revenue | The following table summarizes revenue by source:
| Three Months Ended March 31,
(in thousands) | 2020 |  | 2019
Investment management fees |  |  |
Open-end funds | $ | 59,108 |  |  | $ | 53,293 |
Closed-end funds | 10,179 |  |  | 10,019 |
Retail separate accounts | 25,714 |  |  | 18,005 |
Institutional accounts | 22,917 |  |  | 22,177 |
Structured products | 1,574 |  |  | 1,647 |
Other products | 796 |  |  | 777 |
Total investment management fees | 120,288 |  |  | 105,918 |
Distribution and service fees | 9,460 |  |  | 10,063 |
Administration and shareholder service fees | 14,653 |  |  | 14,413 |
Other income and fees | 165 |  |  | 324 |
Total revenues | $ | 144,566 |  |  | $ | 130,718 |

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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=118956577&loc=SL49130545-203045 + Details
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