Consolidated Statements Of Income - USD ($) shares in Thousands, $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2015	Jun. 30, 2014	Jun. 30, 2015	Jun. 30, 2014
Income Statement [Abstract]
Sales	$ 1,124,327	$ 1,013,959	$ 2,157,672	$ 1,902,305
Cost of sales	804,913	709,045	1,544,527	1,338,974
Gross profit	319,414	304,914	613,145	563,331
Operating expenses:
Selling and marketing	79,656	74,178	149,341	139,748
Research and development	41,431	36,984	80,294	72,497
General and administrative	51,948	52,942	101,487	94,234
Total operating expenses	173,035	164,104	331,122	306,479
Income from financial services	17,638	14,625	32,280	25,265
Operating income	164,017	155,435	314,303	282,117
Non-operating expense (income):
Interest expense	2,972	3,039	5,882	5,851
Equity in loss of other affiliates	1,748	967	3,371	1,863
Other expense (income), net	2,681	(1,883)	10,121	(3,988)
Income before income taxes	156,616	153,312	294,929	278,391
Provision for income taxes	55,673	56,407	105,423	100,585
Net income	$ 100,943	$ 96,905	$ 189,506	$ 177,806
Basic net income per share (in dollars per share)	$ 1.52	$ 1.47	$ 2.86	$ 2.70
Diluted net income per share (in dollars per share)	$ 1.49	$ 1.42	$ 2.79	$ 2.61
Weighted average shares outstanding:
Basic (in shares)	66,324	66,060	66,376	65,946
Diluted (in shares)	67,829	68,088	67,987	68,023