XML 12 R1.htm IDEA: XBRL DOCUMENT v3.19.2
Document and Entity Information - shares
 6 Months Ended
Jun. 30, 2019
Jul. 26, 2019
Document Information [Line Items]    
Document Type 10-Q  
Document Quarterly Report true  
Document Period End Date Jun. 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 Q2  
Amendment Flag false  
Class A Common Stock    
Document Information [Line Items]    
Entity Common Stock, Shares Outstanding   56,138,806
Class B Common Stock    
Document Information [Line Items]    
Entity Common Stock, Shares Outstanding   7,912,056
Class C Common Stock    
Document Information [Line Items]    
Entity Common Stock, Shares Outstanding   13,757,111