v2.4.0.8
Document And Entity Information
9 Months Ended
Sep. 30, 2015
Nov. 02, 2015
Entity Registrant Name GENERAC HOLDINGS INC.  
Entity Central Index Key 0001474735  
Trading Symbol gnrc  
Current Fiscal Year End Date --12-31  
Entity Filer Category Large Accelerated Filer  
Entity Current Reporting Status Yes  
Entity Voluntary Filers No  
Entity Well-known Seasoned Issuer Yes  
Entity Common Stock, Shares Outstanding (in shares)   67,163,204
Document Type 10-Q  
Document Period End Date Sep. 30, 2015  
Document Fiscal Year Focus 2015  
Document Fiscal Period Focus Q3  
Amendment Flag false