Consolidated Statements Of Income (USD $) In Thousands, except Per Share data, unless otherwise specified	12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010
Sales	$ 3,209,782	$ 2,656,949	$ 1,991,139
Cost of sales	2,284,485	1,916,366	1,460,926
Gross profit	925,297	740,583	530,213
Operating expenses:
Selling and marketing	210,367	178,725	142,353
Research and development	127,361	105,631	84,940
General and administrative	143,064	130,395	99,055
Total operating expenses	480,792	414,751	326,348
Income from financial services	33,920	24,092	16,856
Operating income	478,425	349,924	220,721
Non-operating expense (income):
Interest expense	5,932	3,987	2,680
Gain on securities available for sale			(825)
Equity in loss of other affiliates	179
Other (income) expense, net	(7,529)	(689)	325
Income before income taxes	479,843	346,626	218,541
Provision for income taxes	167,533	119,051	71,403
Net income	$ 312,310	$ 227,575	$ 147,138
Basic net income per share	$ 4.54	$ 3.31	$ 2.20
Diluted Net Income per Share	$ 4.40	$ 3.20	$ 2.14
Weighted average shares outstanding:
Basic	68,849	68,792	66,900
Diluted	71,005	71,057	68,765