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Cover Page - shares
 3 Months Ended
Sep. 30, 2019
Nov. 05, 2019
Document Information [Line Items]    
City Area Code (865)  
Document Type 10-Q  
Document Quarterly Report true  
Document Transition Report false  
Security Exchange Name NASDAQ  
Trading Symbol MBUU  
Title of 12(b) Security Class A Common Stock, par value $0.01  
Entity Interactive Data Current Yes  
Entity Current Reporting Status Yes  
Entity Tax Identification Number 46-4024640  
Entity Incorporation, State or Country Code DE  
Entity Address, Address Line One 5075 Kimberly Way,  
Entity Address, City or Town Loudon,  
Entity Address, State or Province TN  
Local Phone Number 458-5478  
Entity Address, Postal Zip Code 37774  
Entity File Number 001-36290  
Entity Registrant Name MALIBU BOATS, INC.  
Entity Central Index Key 0001590976  
Document Period End Date Sep. 30, 2019  
Amendment Flag false  
Document Fiscal Year Focus 2020  
Document Fiscal Period Focus Q1  
Current Fiscal Year End Date --06-30  
Entity Filer Category Large Accelerated Filer  
Entity Emerging Growth Company false  
Entity Smaller Reporting Company false  
Entity Shell Company false  
Class A Common Stock    
Document Information [Line Items]    
Entity Common Stock, Shares Outstanding (in shares)   20,465,064
Class B Common Stock    
Document Information [Line Items]    
Entity Common Stock, Shares Outstanding (in shares)   15