Consolidated Statements Of Cash Flows - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Operating Activities:
Net income	$ 455,361	$ 454,029	$ 377,292
Loss from discontinued operations	0	0	3,777
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization	152,138	127,507	92,100
Noncash compensation	61,929	63,183	57,893
Noncash income from financial services	(29,405)	(18,645)	(4,983)
Deferred income taxes	(16,343)	(50,388)	(5,892)
Tax effect of share-based compensation exercises	(34,654)	(36,966)	(28,621)
Other, net	6,802	6,124	7,414
Changes in operating assets and liabilities:
Trade receivables	48,798	(24,174)	(54,055)
Inventories	(148,725)	(158,476)	(52,049)
Accounts payable	(46,095)	105,783	51,519
Accrued expenses	9,182	30,664	53,278
Income taxes payable/receivable	(247)	45,324	33,398
Prepaid expenses and others, net	(18,510)	(14,695)	(31,919)
Cash provided by continuing operations	440,231	529,270	499,152
Cash used for discontinued operations	0	0	(6,912)
Net cash provided by operating activities	440,231	529,270	492,240
Investing Activities:
Purchase of property and equipment	(249,485)	(205,079)	(251,401)
Investment in finance affiliate	(23,087)	(32,582)	(19,251)
Distributions from finance affiliate	42,527	31,337	12,005
Investment in other affiliates	(17,848)	(12,445)	(10,934)
Acquisition of businesses, net of cash acquired	(41,195)	(28,013)	(137,104)
Net cash used for investing activities	(289,088)	(246,782)	(406,685)
Financing Activities:
Borrowings under debt arrangements / capital lease obligations	2,631,067	2,146,457	776,669
Repayments under debt arrangements / capital lease obligations	(2,385,480)	(2,228,587)	(597,492)
Repurchase and retirement of common shares	(293,616)	(81,812)	(530,033)
Cash dividends to shareholders	(139,285)	(126,908)	(113,722)
Tax effect of proceeds from share-based compensation exercises	34,654	36,966	28,621
Proceeds from stock issuances under employee plans	32,535	31,313	26,922
Net cash used for financing activities	(120,125)	(222,571)	(409,035)
Impact of currency exchange rates on cash balances	(13,269)	(14,565)	(1,287)
Net increase (decrease) in cash and cash equivalents	17,749	45,352	(324,767)
Cash and cash equivalents at beginning of period	137,600	92,248	417,015
Cash and cash equivalents at end of period	155,349	137,600	92,248
Noncash Activity:
Property and equipment obtained through capital leases and notes payable	14,500	24,908	0
Supplemental Cash Flow Information:
Interest paid on debt borrowings	11,451	11,259	6,076
Income taxes paid	$ 244,328	$ 261,550	$ 162,647