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Acquisitions - Additional Informaton (Detail) - USD ($)
3 Months Ended 12 Months Ended
Jul. 02, 2018
Dec. 31, 2019
Sep. 30, 2019
Jun. 30, 2019
Mar. 31, 2019
Dec. 31, 2018
Sep. 30, 2018
Jun. 30, 2018
Mar. 31, 2018
Dec. 31, 2019
Dec. 31, 2018
Dec. 31, 2017
Business Acquisition [Line Items]                        
Total consideration for acquisition, less cash acquired                   $ 1,800,000 $ 759,801,000 $ (1,645,000)
Pro forma net income                   323,884,000 335,257,000 172,492,000
Sales   $ 1,735,866,000 $ 1,771,647,000 $ 1,779,315,000 $ 1,495,690,000 $ 1,627,120,000 $ 1,651,415,000 $ 1,502,532,000 $ 1,297,473,000 6,782,518,000 6,078,540,000 5,428,477,000
Gross profit   $ 423,344,000 $ 436,542,000 $ 436,448,000 $ 352,448,000 $ 391,273,000 $ 401,270,000 $ 385,176,000 $ 323,481,000 1,648,782,000 1,501,200,000 $ 1,324,651,000
Boat Holdings, LLC                        
Business Acquisition [Line Items]                        
Percentage of outstanding voting interest acquired 100.00%                      
Weighted average useful life 19 years                      
Acquisition-related costs                   6,352,000 9,646,000  
Total consideration for acquisition, less cash acquired $ 806,658,000                      
Aggregate consideration $ 100,000,000                      
Deferred annual payment term 12 years                      
Sales                   621,353,000 279,656,000  
Gross profit                   $ 124,613,000 $ 46,252,000  
Boat Holdings, LLC | Customer Relationships | Minimum                        
Business Acquisition [Line Items]                        
Weighted average useful life 15 years                      
Boat Holdings, LLC | Customer Relationships | Maximum                        
Business Acquisition [Line Items]                        
Weighted average useful life 20 years                      
Senior Unsecured Notes 4.23 Percent, Due July 2028 | Senior Notes                        
Business Acquisition [Line Items]                        
Interest rate, stated percentage 4.23% 4.23%               4.23%