Consolidated Statements Of Income (USD $) In Thousands, except Per Share data, unless otherwise specified	3 Months Ended		6 Months Ended
	Jun. 30, 2013	Jun. 30, 2012	Jun. 30, 2013	Jun. 30, 2012
Sales	$ 844,800	$ 755,446	$ 1,590,709	$ 1,429,196
Cost of sales	592,462	538,697	1,121,723	1,017,484
Gross profit	252,338	216,749	468,986	411,712
Operating expenses:
Selling and marketing	62,238	50,555	116,731	95,688
Research and development	34,604	31,216	66,054	61,682
General and administrative	41,444	32,759	80,254	67,759
Total operating expenses	138,286	114,530	263,039	225,129
Income from financial services	11,502	8,215	21,576	15,398
Operating income	125,554	110,434	227,523	201,981
Non-operating expense (income):
Interest expense	1,371	1,466	2,844	2,978
Equity in loss of other affiliates	586	0	998	0
Other (income) expense, net	(1,230)	210	(3,698)	(2,367)
Income before income taxes	124,827	108,758	227,379	201,370
Provision for income taxes	44,823	38,935	71,911	71,469
Net income	$ 80,004	$ 69,823	$ 155,468	$ 129,901
Basic net income per share (in dollars per share)	$ 1.16	$ 1.01	$ 2.26	$ 1.89
Diluted net income per share ( in dollars per share)	$ 1.13	$ 0.98	$ 2.20	$ 1.83
Weighted average shares outstanding:
Basic (in shares)	68,867	68,954	68,830	68,795
Diluted (in shares)	70,755	71,161	70,759	70,993