Consolidated Statements of Income - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Revenue:
Motorcycles and Related Products	$ 4,915,027	$ 5,271,376	$ 5,308,744
Financial Services	732,197	725,082	686,658
Total revenue	5,647,224	5,996,458	5,995,402
Costs and expenses:
Motorcycles and Related Products cost of goods sold	3,261,683	3,419,710	3,356,284
Financial Services interest expense	180,193	173,756	161,983
Financial Services provision for credit losses	132,444	136,617	101,345
Selling, administrative and engineering expense	1,181,641	1,217,439	1,220,095
Total costs and expenses	4,755,961	4,947,522	4,839,707
Operating income	891,263	1,048,936	1,155,695
Investment income	3,580	4,645	6,585
Interest expense	31,004	29,670	12,117
Income before provision for income taxes	863,839	1,023,911	1,150,163
Provision for income taxes	342,080	331,747	397,956
Net income	$ 521,759	$ 692,164	$ 752,207
Earnings per common share:
Basic (in dollars per share)	$ 3.03	$ 3.85	$ 3.71
Diluted (in dollars per share)	3.02	3.83	3.69
Cash dividends per common share (in dollars per share)	$ 1.46	$ 1.40	$ 1.24