Consolidated Statements Of Income (USD $) In Thousands, except Per Share data, unless otherwise specified	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Income Statement [Abstract]
Sales	$ 3,777,068	$ 3,209,782	$ 2,656,949
Cost of sales	2,656,189	2,284,485	1,916,366
Gross profit	1,120,879	925,297	740,583
Operating expenses:
Selling and marketing	270,266	210,367	178,725
Research and development	139,193	127,361	105,631
General and administrative	179,407	143,064	130,395
Total operating expenses	588,866	480,792	414,751
Income from financial services	45,901	33,920	24,092
Operating income	577,914	478,425	349,924
Non-operating expense (income):
Interest expense	6,210	5,932	3,987
Equity in loss of other affiliates	2,414	179	0
Other (income), net	(5,139)	(7,529)	(689)
Income before income taxes	574,429	479,843	346,626
Provision for income taxes	193,360	167,533	119,051
Net income from continuing operations	381,069	312,310	227,575
Loss from discontinued operations, net of tax	(3,777)	0	0
Net income	$ 377,292	$ 312,310	$ 227,575
Basic net income per share:
Continuing operations (in dollars per share)	$ 5.56	$ 4.54	$ 3.31
Loss from discontinued operations (in dollars per share)	$ (0.05)	$ 0.00	$ 0.00
Basic net income per share (in dollars per share)	$ 5.51	$ 4.54	$ 3.31
Diluted net income per share:
Continuing operations (in dollars per share)	$ 5.40	$ 4.40	$ 3.20
Loss from discontinued operations (in dollars per share)	$ (0.05)	$ 0.00	$ 0.00
Diluted net income per share (in dollars per share)	$ 5.35	$ 4.40	$ 3.20
Weighted average shares outstanding:
Basic (in shares)	68,535	68,849	68,792
Diluted (in shares)	70,546	71,005	71,057