Consolidated Statements Of Income (USD $) In Thousands, except Per Share data, unless otherwise specified	3 Months Ended
	Mar. 31, 2014	Mar. 31, 2013
Income Statement [Abstract]
Sales	$ 888,346	$ 745,909
Cost of sales	629,929	529,261
Gross profit	258,417	216,648
Operating expenses:
Selling and marketing	65,570	54,493
Research and development	35,513	31,450
General and administrative	41,292	38,810
Total operating expenses	142,375	124,753
Income from financial services	10,640	10,074
Operating income	126,682	101,969
Non-operating expense (income):
Interest expense	2,812	1,473
Equity in loss of other affiliates	896	412
Other (income), net	(2,105)	(2,468)
Income before income taxes	125,079	102,552
Provision for income taxes	44,178	27,088
Net income	$ 80,901	$ 75,464
Basic net income per share:
Basic net income per share (in dollars per share)	$ 1.23	$ 1.10
Diluted net income per share:
Diluted net income per share (in dollars per share)	$ 1.19	$ 1.07
Weighted average shares outstanding:
Basic (in shares)	65,833	68,793
Diluted (in shares)	67,958	70,762