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Product Warranties Narrative (Details)
 6 Months Ended
Dec. 31, 2017
Malibu and Axis Products MY16 and subsequent  
Product Warranty Liability [Line Items]  
Standard product warranty, period 5 years
Malibu boats MY15 and prior  
Product Warranty Liability [Line Items]  
Standard product warranty, period 3 years
Axis boats MY15 and prior  
Product Warranty Liability [Line Items]  
Standard product warranty, period 2 years
Cobalt structural products  
Product Warranty Liability [Line Items]  
Standard product warranty, period 10 years
Cobalt bow-to-stern products  
Product Warranty Liability [Line Items]  
Standard product warranty, period 5 years
Gelcoat products  
Product Warranty Liability [Line Items]  
Standard product warranty, period 3 years