Consolidated Statements Of Income - USD ($) shares in Thousands, $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2017	Jun. 30, 2016	Jun. 30, 2017	Jun. 30, 2016
Income Statement [Abstract]
Sales	$ 1,364,920	$ 1,130,777	$ 2,518,702	$ 2,113,773
Cost of sales	1,014,534	846,274	1,925,825	1,581,692
Gross profit	350,386	284,503	592,877	532,081
Operating expenses:
Selling and marketing	118,531	77,820	232,844	155,061
Research and development	60,753	45,579	112,758	88,688
General and administrative	91,063	64,566	166,577	134,146
Total operating expenses	270,347	187,965	512,179	377,895
Income from financial services	19,143	20,464	39,573	39,960
Operating income	99,182	117,002	120,271	194,146
Non-operating expense:
Interest expense	8,032	3,802	15,946	6,667
Equity in loss of other affiliates	1,336	1,583	3,236	3,641
Other expense (income), net	(2,152)	1,805	9,456	1,886
Income before income taxes	91,966	109,812	91,633	181,952
Provision for income taxes	29,925	38,646	32,503	63,897
Net income	$ 62,041	$ 71,166	$ 59,130	$ 118,055
Basic net income per share (in dollars per share)	$ 0.99	$ 1.10	$ 0.94	$ 1.82
Diluted net income per share (in dollars per share)	$ 0.97	$ 1.09	$ 0.92	$ 1.80
Weighted average shares outstanding:
Basic (in shares)	62,895	64,406	63,012	64,726
Diluted (in shares)	63,807	65,297	63,970	65,639