Noncontrolling interest - Holdings Share Issuances & Cancellations (Details) - USD ($) $ in Thousands	3 Months Ended
Mar. 31, 2020	Mar. 31, 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	$ 62,825	$ (10)
Delivery of Shares Underlying RSUs (in shares)	24,233
Artisan Partners Holdings LP
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Ending balance	77.00%
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)
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
Holdings GP Units
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Beginning balance (in shares)	56,429,825
Ending balance (in shares)	60,647,331
Holdings GP Units \| 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)	(1,626,611)
Restricted share award net share settlement (in shares)	0
Forfeitures of Holdings GP Units from Employee Terminations (in shares)	0
Ending balance (in shares)	17,943,092
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	2.00%
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)	(24,778)
Ending balance (in shares)	78,590,423
Capital Units \| Artisan Partners Holdings LP
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Beginning balance	73.00%
Ending balance	77.00%
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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Noncontrolling Interest, Increase (Decrease) Ownership Interest, Exchange of Units, Percent

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Number of capital units or capital shares outstanding. This element is relevant to issuers of face-amount certificates and registered investment companies.

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The parent entity's interest in net assets of the subsidiary, expressed as a percentage.

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The number of shares issued during the period upon the conversion of units. An example of a convertible unit is an umbrella partnership real estate investment trust unit (UPREIT unit).

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Equity impact of the value of new stock issued during the period. Includes shares issued in an initial public offering or a secondary public offering.

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