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%