Consolidated Statements Of Income (USD $) In Thousands, except Per Share data, unless otherwise specified	3 Months Ended		6 Months Ended
	Jun. 30, 2014	Jun. 30, 2013	Jun. 30, 2014	Jun. 30, 2013
Income Statement [Abstract]
Sales	$ 1,013,959	$ 844,800	$ 1,902,305	$ 1,590,709
Cost of sales	709,045	592,462	1,338,974	1,121,723
Gross profit	304,914	252,338	563,331	468,986
Operating expenses:
Selling and marketing	74,178	62,238	139,748	116,731
Research and development	36,984	34,604	72,497	66,054
General and administrative	52,942	41,444	94,234	80,254
Total operating expenses	164,104	138,286	306,479	263,039
Income from financial services	14,625	11,502	25,265	21,576
Operating income	155,435	125,554	282,117	227,523
Non-operating expense (income):
Interest expense	3,039	1,371	5,851	2,844
Equity in loss of other affiliates	967	586	1,863	998
Other (income), net	(1,883)	(1,230)	(3,988)	(3,698)
Income before income taxes	153,312	124,827	278,391	227,379
Provision for income taxes	56,407	44,823	100,585	71,911
Net income	$ 96,905	$ 80,004	$ 177,806	$ 155,468
Basic net income per share
Basic net income per share (in dollars per share)	$ 1.47	$ 1.16	$ 2.70	$ 2.26
Diluted net income per share
Diluted net income per share (in dollars per share)	$ 1.42	$ 1.13	$ 2.61	$ 2.20
Weighted average shares outstanding:
Basic (in shares)	66,060	68,867	65,946	68,830
Diluted (in shares)	68,088	70,755	68,023	70,759