Consolidated Statements Of Income - USD ($) shares in Thousands, $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2016	Jun. 30, 2015	Jun. 30, 2016	Jun. 30, 2015
Income Statement [Abstract]
Sales	$ 1,130,777	$ 1,124,327	$ 2,113,773	$ 2,157,672
Cost of sales	846,274	804,913	1,581,692	1,544,527
Gross profit	284,503	319,414	532,081	613,145
Operating expenses:
Selling and marketing	77,820	79,656	155,061	149,341
Research and development	45,579	41,431	88,688	80,294
General and administrative	64,566	51,948	134,146	101,487
Total operating expenses	187,965	173,035	377,895	331,122
Income from financial services	20,464	17,638	39,960	32,280
Operating income	117,002	164,017	194,146	314,303
Non-operating expense:
Interest expense	3,802	2,972	6,667	5,882
Equity in loss of other affiliates	1,583	1,748	3,641	3,371
Other expense, net	1,805	2,681	1,886	10,121
Income before income taxes	109,812	156,616	181,952	294,929
Provision for income taxes	38,646	55,673	63,897	105,423
Net income	$ 71,166	$ 100,943	$ 118,055	$ 189,506
Basic net income per share (in dollars per share)	$ 1.10	$ 1.52	$ 1.82	$ 2.86
Diluted net income per share (in dollars per share)	$ 1.09	$ 1.49	$ 1.80	$ 2.79
Weighted average shares outstanding:
Basic (in shares)	64,406	66,324	64,726	66,376
Diluted (in shares)	65,297	67,829	65,639	67,987