Revenue (Disaggregation of Revenue) (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2019	Apr. 01, 2018
Disaggregation of Revenue
Revenue	$ 1,384,380	$ 1,542,121
Motorcycles and Related Products
Disaggregation of Revenue
Revenue	1,195,637	1,363,947
Motorcycles and Related Products | Motorcycles
Disaggregation of Revenue
Revenue	964,575	1,121,673
Motorcycles and Related Products | Parts & Accessories
Disaggregation of Revenue
Revenue	159,703	169,075
Motorcycles and Related Products | General Merchandise
Disaggregation of Revenue
Revenue	55,401	56,601
Motorcycles and Related Products | Licensing
Disaggregation of Revenue
Revenue	8,577	8,358
Motorcycles and Related Products | Other
Disaggregation of Revenue
Revenue	7,381	8,240
Financial Services
Disaggregation of Revenue
Revenue	188,743	178,174
Financial Services | Financial Services Interest income
Disaggregation of Revenue
Revenue	159,804	154,041
Financial Services | Securitization and servicing fee income
Disaggregation of Revenue
Revenue	189	352
Financial Services | Financial Services Other income
Disaggregation of Revenue
Revenue	$ 28,750	$ 23,781