Goodwill and Intangible Assets - Changes In Carrying Amount Of Goodwill (Details) - USD ($) $ in Thousands		12 Months Ended
	Mar. 04, 2019	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Goodwill [Line Items]
Balance, beginning of period		$ 64,160
Acquisitions	$ 9,500
Balance, end of period		65,976	$ 64,160
Motorcycles
Goodwill [Line Items]
Balance, beginning of period		64,160	55,048	$ 55,947
Acquisitions		0	9,520	0
Currency translation		1,816	(408)	(899)
Balance, end of period		$ 65,976	$ 64,160	$ 55,048