v3.19.3
Document and Entity Information - shares
9 Months Ended
Sep. 30, 2019
Nov. 08, 2019
Document and Entity Information [Abstract]    
Document Type 10-Q  
Amendment Flag false  
Document Period End Date Sep. 30, 2019  
Document Fiscal Year Focus 2019  
Document Fiscal Period Focus Q3  
Entity Registrant Name Manning & Napier, Inc.  
Entity Central Index Key 0001524223  
Current Fiscal Year End Date --12-31  
Entity Filer Category Non-accelerated Filer  
Entity Small Business true  
Entity Emerging Growth Company false  
Entity Current Reporting Status Yes  
Entity Shell Company false  
Entity Common Stock, Shares Outstanding   15,594,407