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Financial Services Arrangements - Additional Information (Detail) - USD ($)
$ in Thousands
Dec. 31, 2017
Dec. 31, 2016
Investments in and Advances to Affiliates [Line Items]    
Investment in finance affiliate $ 88,764 $ 94,009
Net amount financed for dealers 1,192,971  
Trade receivables, net 200,144 $ 174,832
Aggregate repurchase obligation, amount $ 183,951  
Maximum    
Investments in and Advances to Affiliates [Line Items]    
Aggregate repurchase obligation 15.00%  
Polaris Acceptance    
Investments in and Advances to Affiliates [Line Items]    
Equity method investment ownership percentage 50.00%  
Trade receivables, net $ 518,199  
Securitization Facility    
Investments in and Advances to Affiliates [Line Items]    
Outstanding balance of receivables $ 674,772