Noncontrolling interest - Holdings Share Issuances & Cancellations (Details)	9 Months Ended
Sep. 30, 2019 shares
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Restricted share award net share settlement (in shares)	(82,729)
Ending balance	72.00%
Class A Common Stock
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Restricted share award net share settlement (in shares)	(82,729)
Holdings GP Units
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Beginning balance (in shares)	54,071,188
Ending balance (in shares)	56,261,026
Limited Partnership Units
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Beginning balance (in shares)	22,871,684
Holdings common unit exchanges (in shares)	(1,330,432)
Restricted share award net share settlement (in shares)	0
Forfeitures of Holdings GP Units from Employee Terminations (in shares)	0
Ending balance (in shares)	21,541,252
Capital Units
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Beginning balance (in shares)	76,942,872
Beginning balance	70.00%
Holdings common unit exchanges (in shares)	0
Holdings of common unit exchanges, APAM ownership percentage	1.00%
Change in APAM economic ownership Interest in Artisan Partners Holdings LP (as a percent)	0.00%
Restricted share award net share settlement (in shares)	(82,729)
Forfeitures of Holdings GP Units from Employee Terminations (in shares)	(16,865)
Ending balance	72.00%
Ending balance (in shares)	77,802,278
Restricted Stock
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Shares issued (in shares)	959,000
Restricted Stock \| Class A Common Stock
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Shares issued (in shares)	959,000
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)	959,000
Change in APAM economic ownership Interest in Artisan Partners Holdings LP (as a percent)	1.00%
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%

Change in APAM Economic Ownership Interest in Artisan Partners Holdings LP (as a percent)

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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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Number of shares used to settle grantee's tax withholding obligation for award under share-based payment arrangement.

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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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