Consolidated Statements Of Cash Flows (USD $) In Thousands, unless otherwise specified	9 Months Ended
	Sep. 30, 2012	Sep. 30, 2011
Operating Activities:
Net income	$ 224,246	$ 163,676
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization	51,489	50,692
Noncash compensation	26,964	14,815
Noncash income from financial services	(2,479)	(3,398)
Deferred income taxes	(5,277)	(6,404)
Tax effect of share-based compensation exercises	(17,810)	(13,361)
Changes in current operating items:
Trade receivables	(20,272)	(17,563)
Inventories	(109,912)	(96,474)
Accounts payable	81,489	73,207
Accrued expenses	(451)	27,243
Income taxes payable/receivable	36,185	4,819
Prepaid expenses and other, net	(9,684)	827
Net cash provided by operating activities	254,488	198,079
Investing Activities:
Purchase of property and equipment	(65,804)	(62,474)
Investment in finance affiliate, net	(2,790)	3,294
Investment in other affiliates	(7,000)
Acquisition of businesses, net of cash acquired	(383)	(27,960)
Net cash used for investing activities	(75,977)	(87,140)
Financing Activities:
Borrowings under senior notes/capital lease obligations	2,232	100,000
Repayments under credit agreement/capital lease obligations	(2,137)	(200,000)
Repurchase and retirement of common shares	(58,978)	(62,462)
Cash dividends to shareholders	(76,009)	(46,147)
Tax effect of proceeds from share-based compensation exercises	17,810	13,361
Proceeds from stock issuances under employee plans	25,458	28,005
Net cash used for financing activities	(91,624)	(167,243)
Impact of currency translation on cash balances	675	(1,876)
Net increase (decrease) in cash and cash equivalents	87,562	(58,180)
Cash and cash equivalents at beginning of period	325,336	393,927
Cash and cash equivalents at end of period	$ 412,898	$ 335,747