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v3.20.2

Noncontrolling interest - Holdings Share Issuances & Cancellations (Details) - USD ($) $ in Thousands | 3 Months Ended | 6 Months Ended
--- | --- | ---
Jun. 30, 2020 | Jun. 30, 2019 | Jun. 30, 2020 | Jun. 30, 2019
Increase (Decrease) in Stockholders' Equity [Roll Forward] |  |  |  |
Shares issued (in shares) |  |  | 0 |
Change in APAM economic ownership Interest in Artisan Partners Holdings LP (as a percent) |  |  | 2.00% |
Restricted share award net share settlement (in shares) |  |  | (126,971) |
Issuance of Class A common stock, net of issuance costs | $ (86) | $ (8) | $ 62,739 | $ (18)
Delivery of Shares Underlying RSUs (in shares) |  |  | 24,233 |
Artisan Partners Holdings LP |  |  |  |
Increase (Decrease) in Stockholders' Equity [Roll Forward] |  |  |  |
Ending balance | 78.00% |  | 78.00% |
Follow On Offering |  |  |  |
Increase (Decrease) in Stockholders' Equity [Roll Forward] |  |  |  |
Shares issued (in shares) |  |  | 0 |
Class A Common Stock |  |  |  |
Increase (Decrease) in Stockholders' Equity [Roll Forward] |  |  |  |
Restricted share award net share settlement (in shares) |  |  | (126,971) |
Ending balance (in shares) | 61,354,644 |  | 61,354,644 |
Delivery of Shares Underlying RSUs (in shares) |  |  | 24,233 |
Class A Common Stock | Follow On Offering |  |  |  |
Increase (Decrease) in Stockholders' Equity [Roll Forward] |  |  |  |
Shares issued (in shares) |  |  | 1,802,326 |
Limited Partnership Units |  |  |  |
Increase (Decrease) in Stockholders' Equity [Roll Forward] |  |  |  |
Beginning balance (in shares) |  |  | 21,372,029 |
Holdings common unit exchanges (in shares) |  |  | (2,349,247) |
Restricted share award net share settlement (in shares) |  |  | 0 |
Forfeitures of Holdings GP Units from Employee Terminations (in shares) |  |  | 0 |
Ending balance (in shares) | 17,220,456 |  | 17,220,456 |
Delivery of Shares Underlying RSUs (in shares) |  |  | 0 |
Limited Partnership Units | Follow On Offering |  |  |  |
Increase (Decrease) in Stockholders' Equity [Roll Forward] |  |  |  |
Shares issued (in shares) |  |  | 1,802,326 |
Capital Units |  |  |  |
Increase (Decrease) in Stockholders' Equity [Roll Forward] |  |  |  |
Beginning balance (in shares) |  |  | 77,801,854 |
Holdings common unit exchanges (in shares) |  |  | 0 |
Holdings of common unit exchanges, APAM ownership percentage |  |  | 3.00% |
Change in APAM economic ownership Interest in Artisan Partners Holdings LP (as a percent) |  |  | 0.00% |
Restricted share award net share settlement (in shares) |  |  | (126,971) |
Forfeitures of Holdings GP Units from Employee Terminations (in shares) |  |  | (40,101) |
Ending balance (in shares) | 78,575,100 |  | 78,575,100 |
Capital Units | Artisan Partners Holdings LP |  |  |  |
Increase (Decrease) in Stockholders' Equity [Roll Forward] |  |  |  |
Beginning balance |  |  | 73.00% |
Ending balance | 78.00% |  | 78.00% |
Restricted Stock |  |  |  |
Increase (Decrease) in Stockholders' Equity [Roll Forward] |  |  |  |
Shares issued (in shares) |  |  | 916,085 |
Restricted Stock | Class A Common Stock |  |  |  |
Increase (Decrease) in Stockholders' Equity [Roll Forward] |  |  |  |
Shares issued (in shares) |  |  | 916,085 |
Restricted Stock | Limited Partnership Units |  |  |  |
Increase (Decrease) in Stockholders' Equity [Roll Forward] |  |  |  |
Shares issued (in shares) |  |  | 0 |
Restricted Stock | Capital Units |  |  |  |
Increase (Decrease) in Stockholders' Equity [Roll Forward] |  |  |  |
Shares issued (in shares) |  |  | 916,085 |
Change in APAM economic ownership Interest in Artisan Partners Holdings LP (as a percent) |  |  | 0.00% |
Capital Units |  |  |  |
Increase (Decrease) in Stockholders' Equity [Roll Forward] |  |  |  |
Change in APAM economic ownership Interest in Artisan Partners Holdings LP (as a percent) |  |  | 0.00% |

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