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Noncontrolling interest - Holdings (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2019	Sep. 30, 2018	Sep. 30, 2019	Sep. 30, 2018
Noncontrolling Interest [Line Items]
Cumulative impact of changes in ownership of Artisan Partners Holdings LP, net of tax	$ 0	$ 0	$ 0	$ 0
Net impact to financial condition			0	0
Additional paid-in capital
Noncontrolling Interest [Line Items]
Cumulative impact of changes in ownership of Artisan Partners Holdings LP, net of tax	(627)	(667)	(2,455)	(3,758)
Non-controlling interests - Artisan Partners Holdings
Noncontrolling Interest [Line Items]
Cumulative impact of changes in ownership of Artisan Partners Holdings LP, net of tax	632	669	2,501	3,802
Accumulated other comprehensive income (loss)
Noncontrolling Interest [Line Items]
Cumulative impact of changes in ownership of Artisan Partners Holdings LP, net of tax	$ (5)	$ (2)	$ (46)	$ (44)
Common Stock
Noncontrolling Interest [Line Items]
Stock Repurchased and Retired During Period, Shares			0
Holdings GP Units | Common Stock
Noncontrolling Interest [Line Items]
Stock Repurchased and Retired During Period, Shares			1,330,432

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Cumulative equity impact of changes in ownership of APAM's subsidiary, Artisan Partners Holdings LP as a result of the issuance and forfeiture of equity.

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Number of shares that have been repurchased and retired during the period.

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