Acquisitions - Additional Informaton (Detail) - USD ($)		12 Months Ended
	Jul. 02, 2018	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Business Acquisition [Line Items]
Total consideration for acquisition, less cash acquired		$ 0	$ 1,800,000	$ 759,800,000
Pro forma net income		124,900,000	323,900,000	335,300,000
Sales		7,027,900,000	6,782,500,000	6,078,500,000
Gross profit		1,710,200,000	1,648,800,000	1,501,200,000
Boats
Business Acquisition [Line Items]
Sales		603,400,000	621,300,000	279,700,000
Operating Segments [Member] | Boats
Business Acquisition [Line Items]
Sales		603,400,000	621,300,000	279,700,000
Gross profit		116,400,000	124,600,000	$ 46,300,000
Boat Holdings, LLC
Business Acquisition [Line Items]
Percentage of outstanding voting interest acquired	100.00%
Weighted average useful life	19 years
Acquisition-related costs		$ 6,400,000	$ 9,600,000
Total consideration for acquisition, less cash acquired	$ 806,700,000
Aggregate consideration	$ 100,000,000.0
Deferred annual payment term	12 years
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%