Consolidated Statements Of Income - USD ($) shares in Thousands, $ in Thousands	3 Months Ended
	Mar. 31, 2017	Mar. 31, 2016
Income Statement [Abstract]
Sales	$ 1,153,782	$ 982,996
Cost of sales	911,291	735,418
Gross profit	242,491	247,578
Operating expenses:
Selling and marketing	114,313	77,241
Research and development	52,005	43,109
General and administrative	75,514	69,580
Total operating expenses	241,832	189,930
Income from financial services	20,430	19,496
Operating income	21,089	77,144
Non-operating expense:
Interest expense	7,914	2,865
Equity in loss of other affiliates	1,900	2,058
Other expense, net	11,608	81
Income (loss) before income taxes	(333)	72,140
Provision for income taxes	2,578	25,251
Net income (loss)	$ (2,911)	$ 46,889
Basic net income per share (in dollars per share)	$ (0.05)	$ 0.72
Diluted net income per share (in dollars per share)	$ (0.05)	$ 0.71
Weighted average shares outstanding:
Basic (in shares)	63,128	65,046
Diluted (in shares)	64,133	65,982