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Basis of Presentation - Additional Information (Detail)
3 Months Ended
Dec. 31, 2014
Operations
Dealer
Organization, Consolidation and Presentation of Financial Statements [Abstract]  
Previously independent recreational boat dealers 5hzo_IndependentRecreationalBoatDealersInNumber
Recreational boat dealers 24hzo_RecreationalBoatDealersInNumber
Boat brokerage operations 2hzo_BoatBrokerageOperationsNumber
Full-service yacht repair operations 2hzo_FullServiceYachtRepairOperationsNumber