XML 38 R1.htm IDEA: XBRL DOCUMENT v3.19.3
Document and Entity Information - $ / shares
 9 Months Ended
Sep. 30, 2019
Oct. 25, 2019
Dec. 31, 2018
Document Information [Line Items]      
Document Type 10-Q    
Document Quarterly Report true    
Document Period End Date Sep. 30, 2019    
Document Transition Report false    
Entity File Number 001-35826    
Entity Registrant Name Artisan Partners Asset Management Inc.    
Entity Incorporation, State or Country Code DE    
Entity Tax Identification Number 45-0969585    
Entity Address, Address Line One 875 E. Wisconsin Avenue, Suite 800    
Entity Address, City or Town Milwaukee,    
Entity Address, State or Province WI    
Entity Address, Postal Zip Code 53202    
City Area Code 414    
Local Phone Number 390-6100    
Title of 12(b) Security Class A common stock, par value $0.01 per share    
Trading Symbol APAM    
Security Exchange Name NYSE    
Entity Current Reporting Status Yes    
Entity Interactive Data Current Yes    
Entity Filer Category Large Accelerated Filer    
Entity Small Business false    
Entity Emerging Growth Company false    
Entity Shell Company false    
Entity Central Index Key 0001517302    
Current Fiscal Year End Date --12-31    
Document Fiscal Year Focus 2019    
Document Fiscal Period Focus Q3    
Amendment Flag false    
Class A Common Stock      
Document Information [Line Items]      
Common stock, par value per share (in dollars per share) $ 0.01   $ 0.01
Entity Common Stock, Shares Outstanding   56,260,602  
Common stock, par value per share (in dollars per share) 0.01   0.01
Class B Common Stock      
Document Information [Line Items]      
Common stock, par value per share (in dollars per share) 0.01   0.01
Entity Common Stock, Shares Outstanding   7,853,364  
Common stock, par value per share (in dollars per share) 0.01   0.01
Class C Common Stock      
Document Information [Line Items]      
Common stock, par value per share (in dollars per share) 0.01   0.01
Entity Common Stock, Shares Outstanding   13,687,888  
Common stock, par value per share (in dollars per share) $ 0.01   $ 0.01