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Noncontrolling Interest - Holdings - Result of Increased Equity Ownership Interest in Holdings (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Noncontrolling Interest [Line Items]
Cumulative impact of changes in ownership	$ 0	$ 0
Stock Issued During Period, Shares, New Issues	(24,233)
Share-based Payment Arrangement, Shares Withheld for Tax Withholding Obligation	126,971	82,729	77,442
Artisan Partners Holdings LP
Noncontrolling Interest [Line Items]
APAM economic interest in Artisan Partners Holdings LP (as a percent)	80.00%
General Partnership Units
Noncontrolling Interest [Line Items]
Capital Units, Outstanding	63,131,007	56,429,825	54,071,188	50,463,126
Shares repurchased and retired during the period (shares)		(17,289)	(67,255)
Stock Issued During Period, Shares, Conversion of Units		(1,499,655)	(1,590,611)
Limited Partnership Units
Noncontrolling Interest [Line Items]
Capital Units, Outstanding	15,441,103	21,372,029	22,871,684	25,106,719
Shares repurchased and retired during the period (shares)	0	0	0
Stock Issued During Period, Shares, Conversion of Units	(4,128,600)	(1,499,655)	(1,590,611)
Capital Units
Noncontrolling Interest [Line Items]
Units of Partnership Interest, Amount	78,572,110	77,801,854	76,942,872	75,569,845
Shares repurchased and retired during the period (shares)	(43,091)	(17,289)	(67,255)
Stock Issued During Period, Shares, Conversion of Units	0	0	0
Noncontrolling Interest, Increase (Decrease) Ownership Interest, Exchange of Units, Percent	5.00%	3.00%	2.00%
Capital Units | Artisan Partners Holdings LP
Noncontrolling Interest [Line Items]
APAM economic interest in Artisan Partners Holdings LP (as a percent)	80.00%	73.00%	70.00%	67.00%
Class A Common Stock
Noncontrolling Interest [Line Items]
Stock Issued During Period, Shares, New Issues	(24,233)
Shares repurchased and retired during the period (shares)	(43,091)
Stock Issued During Period, Shares, Conversion of Units	(4,128,600)
Share-based Payment Arrangement, Shares Withheld for Tax Withholding Obligation	126,971	82,729	77,442
Unvested restricted share-based awards
Noncontrolling Interest [Line Items]
Stock Issued During Period, Shares, New Issues	(916,085)	(959,000)	(1,517,724)
Unvested restricted share-based awards | General Partnership Units
Noncontrolling Interest [Line Items]
Stock Issued During Period, Shares, New Issues	(789,114)	(876,271)	(1,440,282)
Unvested restricted share-based awards | Limited Partnership Units
Noncontrolling Interest [Line Items]
Stock Issued During Period, Shares, New Issues	0	0	0
Unvested restricted share-based awards | Capital Units
Noncontrolling Interest [Line Items]
Stock Issued During Period, Shares, New Issues	(789,114)	(876,271)	(1,440,282)
Change in APAM Economic Ownership Interest in Artisan Partners Holdings LP (as a percent)	0.00%	0.00%	0.00%
Unvested restricted share-based awards | Class A Common Stock
Noncontrolling Interest [Line Items]
Stock Issued During Period, Shares, New Issues	(916,085)	(959,000)	(1,517,724)
Capital Units
Noncontrolling Interest [Line Items]
Change in APAM Economic Ownership Interest in Artisan Partners Holdings LP (as a percent)	0.00%	0.00%	0.00%
Follow On Offering | General Partnership Units
Noncontrolling Interest [Line Items]
Stock Issued During Period, Shares, New Issues			(644,424)
Follow On Offering | Limited Partnership Units
Noncontrolling Interest [Line Items]
Shares repurchased and retired during the period (shares)	(1,802,326)		(644,424)
Follow On Offering | Class A Common Stock
Noncontrolling Interest [Line Items]
Stock Issued During Period, Shares, New Issues	(1,802,326)
Capital Units | Unvested restricted share-based awards
Noncontrolling Interest [Line Items]
Change in APAM Economic Ownership Interest in Artisan Partners Holdings LP (as a percent)	0.00%
Capital Units | Follow On Offering
Noncontrolling Interest [Line Items]
Stock Issued During Period, Shares, New Issues	0		0
Change in APAM Economic Ownership Interest in Artisan Partners Holdings LP (as a percent)	2.00%		1.00%

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