Consolidated Statements Of Income - USD ($) shares in Thousands, $ in Thousands	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Income Statement [Abstract]
Sales	$ 4,719,290	$ 4,479,648	$ 3,777,068
Cost of sales	3,380,248	3,160,470	2,656,189
Gross profit	1,339,042	1,319,178	1,120,879
Operating expenses:
Selling and marketing	316,669	314,449	270,266
Research and development	166,460	148,458	139,193
General and administrative	209,077	203,248	179,407
Total operating expenses	692,206	666,155	588,866
Income from financial services	69,303	61,667	45,901
Operating income	716,139	714,690	577,914
Non-operating expense (income):
Interest expense	11,456	11,239	6,210
Equity in loss of other affiliates	6,802	4,124	2,414
Other expense (income), net	12,144	10	(5,139)
Income before income taxes	685,737	699,317	574,429
Provision for income taxes	230,376	245,288	193,360
Net income from continuing operations	455,361	454,029	381,069
Loss from discontinued operations, net of tax	0	0	(3,777)
Net income	$ 455,361	$ 454,029	$ 377,292
Basic net income per share:
Continuing operations (in dollars per share)	$ 6.90	$ 6.86	$ 5.56
Loss from discontinued operations (in dollars per share)	0.00	0.00	(0.05)
Basic net income per share (in dollars per share)	6.90	6.86	5.51
Diluted net income per share:
Continuing operations (in dollars per share)	6.75	6.65	5.40
Loss from discontinued operations (in dollars per share)	0.00	0.00	(0.05)
Diluted net income per share (in dollars per share)	$ 6.75	$ 6.65	$ 5.35
Weighted average shares outstanding:
Basic (in shares)	66,020	66,175	68,535
Diluted (in shares)	67,484	68,229	70,546