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Noncontrolling interest - Holdings (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2019	Jun. 30, 2018	Jun. 30, 2019	Jun. 30, 2018
Noncontrolling Interest [Line Items]
Cumulative impact of changes in ownership of Artisan Partners Holdings LP, net of tax	$ 0	$ 0	$ 0	$ 0
Cumulative impact of changes in ownership of Artisan Partners Holdings, LP, net of tax			0	0
Additional paid-in capital
Noncontrolling Interest [Line Items]
Cumulative impact of changes in ownership of Artisan Partners Holdings LP, net of tax	(1,737)	(2,708)	(1,828)	(3,091)
Non-controlling interests - Artisan Partners Holdings
Noncontrolling Interest [Line Items]
Cumulative impact of changes in ownership of Artisan Partners Holdings LP, net of tax	1,753	2,715	1,869	3,133
Accumulated other comprehensive income (loss)
Noncontrolling Interest [Line Items]
Cumulative impact of changes in ownership of Artisan Partners Holdings LP, net of tax	$ (16)	$ (7)	(41)	(42)
Cumulative impact of changes in ownership of Artisan Partners Holdings, LP, net of tax			(41)	(42)
Deferred Tax Assets | Additional paid-in capital
Noncontrolling Interest [Line Items]
Cumulative impact of changes in ownership of Artisan Partners Holdings, LP, net of tax			$ 600	$ (800)
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			1,202,517

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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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