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Revenues (Tables) | 3 Months Ended
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Mar. 31, 2019
Revenue from Contract with Customer [Abstract] |
Disaggregation of Revenue | The following table summarizes revenue by source:
| Three Months Ended March 31,
| 2019 |  | 2018
($ in thousands) |  |  |
Investment management fees |  |  |
Open-end funds | $ | 53,293 |  |  | $ | 54,361 |
Closed-end funds | 10,019 |  |  | 10,378 |
Retail separate accounts | 18,005 |  |  | 16,529 |
Institutional accounts | 22,177 |  |  | 15,818 |
Structured products | 1,647 |  |  | 2,326 |
Other products | 777 |  |  | 1,064 |
Total investment management fees | 105,918 |  |  | 100,476 |
Distribution and service fees | 10,063 |  |  | 12,607 |
Administration and shareholder service fees | 14,413 |  |  | 15,738 |
Other income and fees | 324 |  |  | 207 |
Total revenues | $ | 130,718 |  |  | $ | 129,028 |

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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://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 606 -SubTopic 10 -Section 50 -Paragraph 5 -URI http://asc.fasb.org/extlink&oid=109196051&loc=SL49130545-203045 + Details
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