Stockholders' Equity - Distributions (Details) - Artisan Partners Holdings LP - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019
Distribution Made to Limited Partner [Line Items]
Holdings Partnership Distributions to Limited Partners	$ 20,923	$ 21,828	$ 60,245	$ 70,152
Holdings Partnership Distributions to APAM	70,024	53,423	181,379	166,307
Partners' Capital Account, Distributions, Total	$ 90,947	$ 75,251	$ 241,624	$ 236,459