Consolidated Statements Of Cash Flows - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Operating Activities:
Net income	$ 212,948	$ 455,361	$ 454,029
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization	167,512	152,138	127,507
Noncash compensation	57,927	61,929	63,183
Noncash income from financial services	(30,116)	(29,405)	(18,645)
Deferred income taxes	(26,056)	(16,343)	(50,388)
Excess tax benefits from share-based compensation	(3,578)	(34,654)	(36,966)
Other, net	13,462	6,802	6,124
Changes in operating assets and liabilities:
Trade receivables	2,030	48,798	(24,174)
Inventories	111,999	(148,725)	(158,476)
Accounts payable	(62,693)	(46,095)	105,783
Accrued expenses	145,261	9,182	30,664
Income taxes payable/receivable	(1,997)	(247)	45,324
Prepaid expenses and others, net	(14,916)	(18,510)	(14,695)
Net cash provided by operating activities	571,783	440,231	529,270
Investing Activities:
Purchase of property and equipment	(209,137)	(249,485)	(205,079)
Investment in finance affiliate	(8,641)	(23,087)	(32,582)
Distributions from finance affiliate	43,820	42,527	31,337
Investment in other affiliates	(11,595)	(17,848)	(12,445)
Acquisition of businesses, net of cash acquired	(723,705)	(41,195)	(28,013)
Net cash used for investing activities	(909,258)	(289,088)	(246,782)
Financing Activities:
Borrowings under debt arrangements / capital lease obligations	3,232,137	2,631,067	2,146,457
Repayments under debt arrangements / capital lease obligations	(2,552,760)	(2,385,480)	(2,228,587)
Repurchase and retirement of common shares	(245,816)	(293,616)	(81,812)
Cash dividends to shareholders	(140,336)	(139,285)	(126,908)
Excess tax benefits from share-based compensation	3,578	34,654	36,966
Proceeds from stock issuances under employee plans	17,690	32,535	31,313
Net cash provided by (used for) financing activities	314,493	(120,125)	(222,571)
Impact of currency exchange rates on cash balances	(5,042)	(13,269)	(14,565)
Net increase (decrease) in cash and cash equivalents	(28,024)	17,749	45,352
Cash and cash equivalents at beginning of period	155,349	137,600	92,248
Cash and cash equivalents at end of period	127,325	155,349	137,600
Noncash Activity:
Property and equipment obtained through capital leases and notes payable	0	14,500	24,908
Supplemental Cash Flow Information:
Interest paid on debt borrowings	15,833	11,451	11,259
Income taxes paid	$ 126,799	$ 244,328	$ 261,550