Goodwill and Other Intangible Assets - Changes in Carrying Amount of Goodwill (Detail) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2021	Mar. 31, 2020	Dec. 31, 2020	Dec. 31, 2019
Goodwill [Roll Forward]
Goodwill, Gross	$ 664,000	$ 658,400	$ 667,600	$ 659,900
Accumulated goodwill impairment losses	(270,300)		(270,300)
Currency translation effect on foreign goodwill balances	(3,600)	(1,500)
Goodwill	393,700	658,400	397,300	659,900
ORV/Snowmobiles
Goodwill [Roll Forward]
Goodwill, Gross	72,800	71,500	72,900	72,000
Currency translation effect on foreign goodwill balances	(100)	(500)
Goodwill	72,800	71,500	72,900	72,000
Motorcycles
Goodwill [Roll Forward]
Goodwill, Gross	5,200	5,200	5,200	5,200
Goodwill	5,200	5,200	5,200	5,200
Global Adjacent Markets
Goodwill [Roll Forward]
Goodwill, Gross	88,600	84,300	92,100	85,200
Currency translation effect on foreign goodwill balances	(3,500)	(900)
Goodwill	88,600	84,300	92,100	85,200
Aftermarket
Goodwill [Roll Forward]
Goodwill, Gross	270,300	270,300	270,300	270,400
Accumulated goodwill impairment losses	(270,300)		(270,300)
Currency translation effect on foreign goodwill balances		(100)
Goodwill	0	270,300	0	270,400
Boats
Goodwill [Roll Forward]
Goodwill, Gross	227,100	227,100	227,100	227,100
Goodwill	$ 227,100	$ 227,100	$ 227,100	$ 227,100