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Investment Securities (Tables) | 9 Months Ended
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Sep. 30, 2019
Investments, Debt and Equity Securities [Abstract] |
Marketable Securities | The disclosures below include details of Artisan’s investments, excluding money market funds and consolidated investment products. Investments held by consolidated investment products are described in Note 6, “Variable Interest Entities and Consolidated Investment Products”.
| As of September 30, 2019 |  | As of December 31, 2018
Investments in equity securities |  | $ | 7,268 |  |  | $ | 5,857 |
Investments in equity securities accounted for under the equity method |  | 15,170 |  |  | 12,252 |
Total investment securities |  | $ | 22,438 |  |  | $ | 18,109 |
Gain (Loss) on Investments | The table below presents the net investment income activity related to these investment securities:
| For the Three Months Ended September 30, |  |  |  | For the Nine Months Ended September 30, |  |
| 2019 |  | 2018 |  | 2019 |  | 2018
Net gains (losses) recognized on investment securities |  | $ | 651 |  |  | $ | 967 |  |  | $ | 3,374 |  |  | $ | 1,592 |
Less: Net realized gains (losses) recognized on investment securities sold during the period |  | $ | — |  |  | $ | — |  |  | $ | — |  |  | $ | — |
Unrealized gains (losses) recognized on investment securities held as of the end of the period |  | $ | 651 |  |  | $ | 967 |  |  | $ | 3,374 |  |  | $ | 1,592 |

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