Revenue (Disaggregation of Revenue) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Disaggregation of Revenue
Revenues	$ 5,716,875	$ 5,647,224	$ 5,996,458
Motorcycles
Disaggregation of Revenue
Revenues	3,882,963
Parts & Accessories
Disaggregation of Revenue
Revenues	754,663
General Merchandise
Disaggregation of Revenue
Revenues	241,964
Licensing
Disaggregation of Revenue
Revenues	38,676
Other
Disaggregation of Revenue
Revenues	50,380
Motorcycles and Related Products
Disaggregation of Revenue
Revenues	4,968,646	4,915,027	5,271,376
Interest income
Disaggregation of Revenue
Revenues	645,985
Securitization and servicing fee income
Disaggregation of Revenue
Revenues	1,136
Other income
Disaggregation of Revenue
Revenues	101,108
Financial Services
Disaggregation of Revenue
Revenues	$ 748,229	$ 732,197	$ 725,082