Restructuring Expenses - Restructuring Plan Reserve Recorded in Accrued Liabilities (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 29, 2020	Mar. 31, 2019
Restructuring Reserve [Roll Forward]
Restructuring expense	$ 0	$ 13,630
Motorcycles and Related Products
Restructuring Reserve [Roll Forward]
Balance, beginning of period	867	28,498
Restructuring expense	0	13,630
Utilized – cash	(447)	(10,142)
Utilized – non cash		(8,379)
Foreign currency changes		32
Balance, end of period	420	23,639
Motorcycles and Related Products | Manufacturing Optimization Plan
Restructuring Reserve [Roll Forward]
Balance, beginning of period	867	25,037
Restructuring expense		14,024
Utilized – cash	(447)	(8,128)
Utilized – non cash		(8,379)
Foreign currency changes		34
Balance, end of period	420	22,588
Motorcycles and Related Products | Employee Termination Benefits
Restructuring Reserve [Roll Forward]
Balance, beginning of period	0	3,461
Restructuring expense		(394)
Utilized – cash	0	(2,014)
Utilized – non cash		0
Foreign currency changes		(2)
Balance, end of period	0	1,051
Motorcycles and Related Products | Employee Termination Benefits | Manufacturing Optimization Plan
Restructuring Reserve [Roll Forward]
Balance, beginning of period	865	24,958
Restructuring expense		9
Utilized – cash	(445)	(2,600)
Utilized – non cash		0
Foreign currency changes		34
Balance, end of period	420	22,401
Motorcycles and Related Products | Accelerated Depreciation | Manufacturing Optimization Plan
Restructuring Reserve [Roll Forward]
Balance, beginning of period	0	0
Restructuring expense		8,379
Utilized – cash	0	0
Utilized – non cash		(8,379)
Foreign currency changes		0
Balance, end of period	0	0
Motorcycles and Related Products | Other | Manufacturing Optimization Plan
Restructuring Reserve [Roll Forward]
Balance, beginning of period	2	79
Restructuring expense		5,636
Utilized – cash	(2)	(5,528)
Utilized – non cash		0
Foreign currency changes		0
Balance, end of period	$ 0	$ 187