Consolidated Statements Of Income - USD ($) shares in Thousands, $ in Thousands	3 Months Ended
	Mar. 31, 2016	Mar. 31, 2015
Income Statement [Abstract]
Sales	$ 982,996	$ 1,033,345
Cost of sales	735,418	739,614
Gross profit	247,578	293,731
Operating expenses:
Selling and marketing	77,241	69,685
Research and development	43,109	38,863
General and administrative	69,580	49,539
Total operating expenses	189,930	158,087
Income from financial services	19,496	14,642
Operating income	77,144	150,286
Non-operating expense:
Interest expense	2,865	2,910
Equity in loss of other affiliates	2,058	1,623
Other expense, net	81	7,440
Income before income taxes	72,140	138,313
Provision for income taxes	25,251	49,750
Net income	$ 46,889	$ 88,563
Basic net income per share (in dollars per share)	$ 0.72	$ 1.33
Diluted net income per share (in dollars per share)	$ 0.71	$ 1.30
Weighted average shares outstanding:
Basic (in shares)	65,046	66,429
Diluted (in shares)	65,982	68,146