XML 20 R1.htm IDEA: XBRL DOCUMENT v3.20.2
Document and Entity Information - USD ($)
 12 Months Ended
Sep. 30, 2020
Nov. 25, 2020
Mar. 31, 2020
Cover [Abstract]      
Document Type 10-K    
Amendment Flag false    
Document Period End Date Sep. 30, 2020    
Document Fiscal Year Focus 2020    
Document Fiscal Period Focus FY    
Trading Symbol HZO    
Entity Registrant Name MarineMax, Inc.    
Entity Central Index Key 0001057060    
Current Fiscal Year End Date --09-30    
Entity Well-known Seasoned Issuer No    
Entity Current Reporting Status Yes    
Entity Voluntary Filers No    
Entity Filer Category Accelerated Filer    
Entity Small Business false    
Entity Emerging Growth Company false    
Entity Shell Company false    
Security Exchange Name NYSE    
Title of 12(b) Security Common Stock, par value $.001 per share    
Entity Interactive Data Current Yes    
Entity File Number 1-14173    
Entity Incorporation, State or Country Code FL    
Entity Tax Identification Number 59-3496957    
Entity Address, Address Line One 2600 McCormick Drive    
Entity Address, Address Line Two Suite 200    
Entity Address, City or Town Clearwater    
Entity Address, State or Province FL    
Entity Address, Postal Zip Code 33759    
City Area Code 727    
Local Phone Number 531-1700    
Document Annual Report true    
Document Transition Report false    
Entity Common Stock, Shares Outstanding   22,073,368  
Entity Public Float     $ 215,559,040