Reportable Segments and Geographic Information (Information By Industry Segment) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Segment Reporting Information [Line Items]
Total assets	$ 10,665,664	$ 9,972,672	$ 9,890,240
Depreciation and amortization	264,863	222,188	209,555
Capital expenditures	213,516	206,294	256,263
Motorcycles
Segment Reporting Information [Line Items]
Total assets	2,562,931	2,449,603	2,490,450
Depreciation and amortization	260,707	215,639	202,122
Capital expenditures	197,905	193,204	245,316
Financial Services
Segment Reporting Information [Line Items]
Total assets	8,102,733	7,523,069	7,399,790
Depreciation and amortization	4,156	6,549	7,433
Capital expenditures	$ 15,611	$ 13,090	$ 10,947